diff --git a/.rubocop.yml b/.rubocop.yml
index fc4ee39572..8a0c55d5d4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -97,10 +97,6 @@ Style/StringLiterals:
   Enabled: true
   EnforcedStyle: double_quotes
 
-Style/FrozenStringLiteralComment:
-  Enabled: true
-  EnforcedStyle: always
-
 # Detect hard tabs, no hard tabs.
 Layout/Tab:
   Enabled: true
diff --git a/Gemfile b/Gemfile
index 1a62782cbe..23b9b34b77 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 source "https://rubygems.org"
 
 git_source(:github) do |repo_name|
diff --git a/Rakefile b/Rakefile
index 3fde31c697..ae269fbce7 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "net/http"
 
 $:.unshift __dir__
diff --git a/actioncable/Rakefile b/actioncable/Rakefile
index 95875fa27b..e21843bb44 100644
--- a/actioncable/Rakefile
+++ b/actioncable/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 require "pathname"
 require "open3"
diff --git a/actioncable/actioncable.gemspec b/actioncable/actioncable.gemspec
index a95e8f8bda..a72c0d2608 100644
--- a/actioncable/actioncable.gemspec
+++ b/actioncable/actioncable.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actioncable/bin/test b/actioncable/bin/test
index c53377cc97..470ce93f10 100755
--- a/actioncable/bin/test
+++ b/actioncable/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/actioncable/lib/action_cable.rb b/actioncable/lib/action_cable.rb
index 8c274b130e..c2d3550acb 100644
--- a/actioncable/lib/action_cable.rb
+++ b/actioncable/lib/action_cable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2015-2017 Basecamp, LLC
 #
diff --git a/actioncable/lib/action_cable/channel.rb b/actioncable/lib/action_cable/channel.rb
index 4ad5e1b003..7ae262ce5f 100644
--- a/actioncable/lib/action_cable/channel.rb
+++ b/actioncable/lib/action_cable/channel.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Channel
     extend ActiveSupport::Autoload
diff --git a/actioncable/lib/action_cable/channel/base.rb b/actioncable/lib/action_cable/channel/base.rb
index ca812e80d2..718f630f58 100644
--- a/actioncable/lib/action_cable/channel/base.rb
+++ b/actioncable/lib/action_cable/channel/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/channel/broadcasting.rb b/actioncable/lib/action_cable/channel/broadcasting.rb
index 3db211446a..23ed4ec943 100644
--- a/actioncable/lib/action_cable/channel/broadcasting.rb
+++ b/actioncable/lib/action_cable/channel/broadcasting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/to_param"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/channel/callbacks.rb b/actioncable/lib/action_cable/channel/callbacks.rb
index 65629e4191..c740132c94 100644
--- a/actioncable/lib/action_cable/channel/callbacks.rb
+++ b/actioncable/lib/action_cable/channel/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/callbacks"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/channel/naming.rb b/actioncable/lib/action_cable/channel/naming.rb
index 433d9c5219..b565cb3cac 100644
--- a/actioncable/lib/action_cable/channel/naming.rb
+++ b/actioncable/lib/action_cable/channel/naming.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Channel
     module Naming
diff --git a/actioncable/lib/action_cable/channel/periodic_timers.rb b/actioncable/lib/action_cable/channel/periodic_timers.rb
index 4686145f64..90c68cfe84 100644
--- a/actioncable/lib/action_cable/channel/periodic_timers.rb
+++ b/actioncable/lib/action_cable/channel/periodic_timers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Channel
     module PeriodicTimers
diff --git a/actioncable/lib/action_cable/channel/streams.rb b/actioncable/lib/action_cable/channel/streams.rb
index c938adab9a..dbba333353 100644
--- a/actioncable/lib/action_cable/channel/streams.rb
+++ b/actioncable/lib/action_cable/channel/streams.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Channel
     # Streams allow channels to route broadcastings to the subscriber. A broadcasting is, as discussed elsewhere, a pubsub queue where any data
diff --git a/actioncable/lib/action_cable/connection.rb b/actioncable/lib/action_cable/connection.rb
index c301846da6..902efb07e2 100644
--- a/actioncable/lib/action_cable/connection.rb
+++ b/actioncable/lib/action_cable/connection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Connection
     extend ActiveSupport::Autoload
diff --git a/actioncable/lib/action_cable/connection/authorization.rb b/actioncable/lib/action_cable/connection/authorization.rb
index e01fdf6c89..989a67d6df 100644
--- a/actioncable/lib/action_cable/connection/authorization.rb
+++ b/actioncable/lib/action_cable/connection/authorization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Connection
     module Authorization
diff --git a/actioncable/lib/action_cable/connection/base.rb b/actioncable/lib/action_cable/connection/base.rb
index e50ed7ef05..ac5f405dea 100644
--- a/actioncable/lib/action_cable/connection/base.rb
+++ b/actioncable/lib/action_cable/connection/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/connection/client_socket.rb b/actioncable/lib/action_cable/connection/client_socket.rb
index 2b45befb01..c7e30e78c8 100644
--- a/actioncable/lib/action_cable/connection/client_socket.rb
+++ b/actioncable/lib/action_cable/connection/client_socket.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "websocket/driver"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/connection/identification.rb b/actioncable/lib/action_cable/connection/identification.rb
index b10728a911..ffab359429 100644
--- a/actioncable/lib/action_cable/connection/identification.rb
+++ b/actioncable/lib/action_cable/connection/identification.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/connection/internal_channel.rb b/actioncable/lib/action_cable/connection/internal_channel.rb
index 1feb1cf0dc..8f0ec766c3 100644
--- a/actioncable/lib/action_cable/connection/internal_channel.rb
+++ b/actioncable/lib/action_cable/connection/internal_channel.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Connection
     # Makes it possible for the RemoteConnection to disconnect a specific connection.
diff --git a/actioncable/lib/action_cable/connection/message_buffer.rb b/actioncable/lib/action_cable/connection/message_buffer.rb
index 222505de6c..4ccd322644 100644
--- a/actioncable/lib/action_cable/connection/message_buffer.rb
+++ b/actioncable/lib/action_cable/connection/message_buffer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Connection
     # Allows us to buffer messages received from the WebSocket before the Connection has been fully initialized, and is ready to receive them.
diff --git a/actioncable/lib/action_cable/connection/stream.rb b/actioncable/lib/action_cable/connection/stream.rb
index 4b755cc7d5..e620b93845 100644
--- a/actioncable/lib/action_cable/connection/stream.rb
+++ b/actioncable/lib/action_cable/connection/stream.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/connection/stream_event_loop.rb b/actioncable/lib/action_cable/connection/stream_event_loop.rb
index 2ea233ed72..2d1af0ff9f 100644
--- a/actioncable/lib/action_cable/connection/stream_event_loop.rb
+++ b/actioncable/lib/action_cable/connection/stream_event_loop.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "nio"
 require "thread"
 
diff --git a/actioncable/lib/action_cable/connection/subscriptions.rb b/actioncable/lib/action_cable/connection/subscriptions.rb
index ae82d2f164..44bce1e195 100644
--- a/actioncable/lib/action_cable/connection/subscriptions.rb
+++ b/actioncable/lib/action_cable/connection/subscriptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/connection/tagged_logger_proxy.rb b/actioncable/lib/action_cable/connection/tagged_logger_proxy.rb
index 7e22a551a3..aef549aa86 100644
--- a/actioncable/lib/action_cable/connection/tagged_logger_proxy.rb
+++ b/actioncable/lib/action_cable/connection/tagged_logger_proxy.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Connection
     # Allows the use of per-connection tags against the server logger. This wouldn't work using the traditional
diff --git a/actioncable/lib/action_cable/connection/web_socket.rb b/actioncable/lib/action_cable/connection/web_socket.rb
index 3df2c577e3..27ae499f29 100644
--- a/actioncable/lib/action_cable/connection/web_socket.rb
+++ b/actioncable/lib/action_cable/connection/web_socket.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "websocket/driver"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/engine.rb b/actioncable/lib/action_cable/engine.rb
index 0cfd0a84c9..63a26636a0 100644
--- a/actioncable/lib/action_cable/engine.rb
+++ b/actioncable/lib/action_cable/engine.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails"
 require "action_cable"
 require "action_cable/helpers/action_cable_helper"
diff --git a/actioncable/lib/action_cable/gem_version.rb b/actioncable/lib/action_cable/gem_version.rb
index f15c22da00..5d6f9af0bb 100644
--- a/actioncable/lib/action_cable/gem_version.rb
+++ b/actioncable/lib/action_cable/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   # Returns the version of the currently loaded Action Cable as a <tt>Gem::Version</tt>.
   def self.gem_version
diff --git a/actioncable/lib/action_cable/helpers/action_cable_helper.rb b/actioncable/lib/action_cable/helpers/action_cable_helper.rb
index b1d312ca53..f53be0bc31 100644
--- a/actioncable/lib/action_cable/helpers/action_cable_helper.rb
+++ b/actioncable/lib/action_cable/helpers/action_cable_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Helpers
     module ActionCableHelper
diff --git a/actioncable/lib/action_cable/remote_connections.rb b/actioncable/lib/action_cable/remote_connections.rb
index 4a4e36a0f1..e689fbf21b 100644
--- a/actioncable/lib/action_cable/remote_connections.rb
+++ b/actioncable/lib/action_cable/remote_connections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   # If you need to disconnect a given connection, you can go through the
   # RemoteConnections. You can find the connections you're looking for by
diff --git a/actioncable/lib/action_cable/server.rb b/actioncable/lib/action_cable/server.rb
index 13ead5486d..22f9353825 100644
--- a/actioncable/lib/action_cable/server.rb
+++ b/actioncable/lib/action_cable/server.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Server
     extend ActiveSupport::Autoload
diff --git a/actioncable/lib/action_cable/server/base.rb b/actioncable/lib/action_cable/server/base.rb
index dd968e88b2..3b3a17a532 100644
--- a/actioncable/lib/action_cable/server/base.rb
+++ b/actioncable/lib/action_cable/server/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "monitor"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/server/broadcasting.rb b/actioncable/lib/action_cable/server/broadcasting.rb
index 10549b5d32..7fcd6c6587 100644
--- a/actioncable/lib/action_cable/server/broadcasting.rb
+++ b/actioncable/lib/action_cable/server/broadcasting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Server
     # Broadcasting is how other parts of your application can send messages to a channel's subscribers. As explained in Channel, most of the time, these
diff --git a/actioncable/lib/action_cable/server/configuration.rb b/actioncable/lib/action_cable/server/configuration.rb
index ecfc846264..17e0dee064 100644
--- a/actioncable/lib/action_cable/server/configuration.rb
+++ b/actioncable/lib/action_cable/server/configuration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Server
     # An instance of this configuration object is available via ActionCable.server.config, which allows you to tweak Action Cable configuration
diff --git a/actioncable/lib/action_cable/server/connections.rb b/actioncable/lib/action_cable/server/connections.rb
index c506c744b3..5e61b4e335 100644
--- a/actioncable/lib/action_cable/server/connections.rb
+++ b/actioncable/lib/action_cable/server/connections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Server
     # Collection class for all the connections that have been established on this specific server. Remember, usually you'll run many Action Cable servers, so
diff --git a/actioncable/lib/action_cable/server/worker.rb b/actioncable/lib/action_cable/server/worker.rb
index c6fb8ec775..43639c27af 100644
--- a/actioncable/lib/action_cable/server/worker.rb
+++ b/actioncable/lib/action_cable/server/worker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/callbacks"
 require "active_support/core_ext/module/attribute_accessors_per_thread"
 require "concurrent"
diff --git a/actioncable/lib/action_cable/server/worker/active_record_connection_management.rb b/actioncable/lib/action_cable/server/worker/active_record_connection_management.rb
index 02886ee441..c1e4aa8103 100644
--- a/actioncable/lib/action_cable/server/worker/active_record_connection_management.rb
+++ b/actioncable/lib/action_cable/server/worker/active_record_connection_management.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module Server
     class Worker
diff --git a/actioncable/lib/action_cable/subscription_adapter.rb b/actioncable/lib/action_cable/subscription_adapter.rb
index 018e8dbe31..596269ab9b 100644
--- a/actioncable/lib/action_cable/subscription_adapter.rb
+++ b/actioncable/lib/action_cable/subscription_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module SubscriptionAdapter
     extend ActiveSupport::Autoload
diff --git a/actioncable/lib/action_cable/subscription_adapter/async.rb b/actioncable/lib/action_cable/subscription_adapter/async.rb
index b1d29a693c..46819dbfec 100644
--- a/actioncable/lib/action_cable/subscription_adapter/async.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/async.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_cable/subscription_adapter/inline"
 
 module ActionCable
diff --git a/actioncable/lib/action_cable/subscription_adapter/base.rb b/actioncable/lib/action_cable/subscription_adapter/base.rb
index c33d75986d..796db5ffa3 100644
--- a/actioncable/lib/action_cable/subscription_adapter/base.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module SubscriptionAdapter
     class Base
diff --git a/actioncable/lib/action_cable/subscription_adapter/channel_prefix.rb b/actioncable/lib/action_cable/subscription_adapter/channel_prefix.rb
index 4beeaa24a0..8b293cc785 100644
--- a/actioncable/lib/action_cable/subscription_adapter/channel_prefix.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/channel_prefix.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module SubscriptionAdapter
     module ChannelPrefix # :nodoc:
diff --git a/actioncable/lib/action_cable/subscription_adapter/evented_redis.rb b/actioncable/lib/action_cable/subscription_adapter/evented_redis.rb
index 2703c7f297..ae71708240 100644
--- a/actioncable/lib/action_cable/subscription_adapter/evented_redis.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/evented_redis.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 
 gem "em-hiredis", "~> 0.3.0"
diff --git a/actioncable/lib/action_cable/subscription_adapter/inline.rb b/actioncable/lib/action_cable/subscription_adapter/inline.rb
index 7e04253635..81357faead 100644
--- a/actioncable/lib/action_cable/subscription_adapter/inline.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module SubscriptionAdapter
     class Inline < Base # :nodoc:
diff --git a/actioncable/lib/action_cable/subscription_adapter/postgresql.rb b/actioncable/lib/action_cable/subscription_adapter/postgresql.rb
index 58db65f546..bdab5205ec 100644
--- a/actioncable/lib/action_cable/subscription_adapter/postgresql.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/postgresql.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 gem "pg", "~> 0.18"
 require "pg"
 require "thread"
diff --git a/actioncable/lib/action_cable/subscription_adapter/redis.rb b/actioncable/lib/action_cable/subscription_adapter/redis.rb
index 1931f443c1..225609c236 100644
--- a/actioncable/lib/action_cable/subscription_adapter/redis.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/redis.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 
 gem "redis", "~> 3.0"
diff --git a/actioncable/lib/action_cable/subscription_adapter/subscriber_map.rb b/actioncable/lib/action_cable/subscription_adapter/subscriber_map.rb
index 373b9d7fe3..4cce86dcca 100644
--- a/actioncable/lib/action_cable/subscription_adapter/subscriber_map.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/subscriber_map.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionCable
   module SubscriptionAdapter
     class SubscriberMap
diff --git a/actioncable/lib/action_cable/version.rb b/actioncable/lib/action_cable/version.rb
index a6fe27aa68..d6081409f0 100644
--- a/actioncable/lib/action_cable/version.rb
+++ b/actioncable/lib/action_cable/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionCable
diff --git a/actioncable/lib/rails/generators/channel/channel_generator.rb b/actioncable/lib/rails/generators/channel/channel_generator.rb
index 0b833611d3..80f512c94c 100644
--- a/actioncable/lib/rails/generators/channel/channel_generator.rb
+++ b/actioncable/lib/rails/generators/channel/channel_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class ChannelGenerator < NamedBase
diff --git a/actioncable/test/channel/base_test.rb b/actioncable/test/channel/base_test.rb
index afefbaf076..9a3a3581e6 100644
--- a/actioncable/test/channel/base_test.rb
+++ b/actioncable/test/channel/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_connection"
 require "stubs/room"
diff --git a/actioncable/test/channel/broadcasting_test.rb b/actioncable/test/channel/broadcasting_test.rb
index 9062a244e4..3476c1db31 100644
--- a/actioncable/test/channel/broadcasting_test.rb
+++ b/actioncable/test/channel/broadcasting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_connection"
 require "stubs/room"
diff --git a/actioncable/test/channel/naming_test.rb b/actioncable/test/channel/naming_test.rb
index b6ac7cfd42..08f0e7be48 100644
--- a/actioncable/test/channel/naming_test.rb
+++ b/actioncable/test/channel/naming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 
 class ActionCable::Channel::NamingTest < ActiveSupport::TestCase
diff --git a/actioncable/test/channel/periodic_timers_test.rb b/actioncable/test/channel/periodic_timers_test.rb
index 02945a2eed..17a8e45a35 100644
--- a/actioncable/test/channel/periodic_timers_test.rb
+++ b/actioncable/test/channel/periodic_timers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_connection"
 require "stubs/room"
diff --git a/actioncable/test/channel/rejection_test.rb b/actioncable/test/channel/rejection_test.rb
index 989ecef1f1..99c4a7603a 100644
--- a/actioncable/test/channel/rejection_test.rb
+++ b/actioncable/test/channel/rejection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_connection"
 require "stubs/room"
diff --git a/actioncable/test/channel/stream_test.rb b/actioncable/test/channel/stream_test.rb
index 14b5d24fbd..50fc7be30b 100644
--- a/actioncable/test/channel/stream_test.rb
+++ b/actioncable/test/channel/stream_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_connection"
 require "stubs/room"
diff --git a/actioncable/test/client_test.rb b/actioncable/test/client_test.rb
index d38d280339..30ac1e9c38 100644
--- a/actioncable/test/client_test.rb
+++ b/actioncable/test/client_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "concurrent"
 
diff --git a/actioncable/test/connection/authorization_test.rb b/actioncable/test/connection/authorization_test.rb
index 174821f785..dcdbe9c1d1 100644
--- a/actioncable/test/connection/authorization_test.rb
+++ b/actioncable/test/connection/authorization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/connection/base_test.rb b/actioncable/test/connection/base_test.rb
index a460fa2a33..9bcd0700cf 100644
--- a/actioncable/test/connection/base_test.rb
+++ b/actioncable/test/connection/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 require "active_support/core_ext/object/json"
diff --git a/actioncable/test/connection/client_socket_test.rb b/actioncable/test/connection/client_socket_test.rb
index b0e01fa5cc..bc3ff6a3d7 100644
--- a/actioncable/test/connection/client_socket_test.rb
+++ b/actioncable/test/connection/client_socket_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/connection/cross_site_forgery_test.rb b/actioncable/test/connection/cross_site_forgery_test.rb
index f94717fecd..37bedfd734 100644
--- a/actioncable/test/connection/cross_site_forgery_test.rb
+++ b/actioncable/test/connection/cross_site_forgery_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/connection/identifier_test.rb b/actioncable/test/connection/identifier_test.rb
index de9447ba3b..f3d3bc0603 100644
--- a/actioncable/test/connection/identifier_test.rb
+++ b/actioncable/test/connection/identifier_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 require "stubs/user"
diff --git a/actioncable/test/connection/multiple_identifiers_test.rb b/actioncable/test/connection/multiple_identifiers_test.rb
index 754e76a123..ca1a08f4d6 100644
--- a/actioncable/test/connection/multiple_identifiers_test.rb
+++ b/actioncable/test/connection/multiple_identifiers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 require "stubs/user"
diff --git a/actioncable/test/connection/stream_test.rb b/actioncable/test/connection/stream_test.rb
index b0f7408cac..36e1d3c095 100644
--- a/actioncable/test/connection/stream_test.rb
+++ b/actioncable/test/connection/stream_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/connection/string_identifier_test.rb b/actioncable/test/connection/string_identifier_test.rb
index 22dc95b8f6..6d53e249cb 100644
--- a/actioncable/test/connection/string_identifier_test.rb
+++ b/actioncable/test/connection/string_identifier_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/connection/subscriptions_test.rb b/actioncable/test/connection/subscriptions_test.rb
index 20333376e9..a1c8a4613c 100644
--- a/actioncable/test/connection/subscriptions_test.rb
+++ b/actioncable/test/connection/subscriptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 
 class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
diff --git a/actioncable/test/server/base_test.rb b/actioncable/test/server/base_test.rb
index bb79ed2ab9..f0a51c5a7d 100644
--- a/actioncable/test/server/base_test.rb
+++ b/actioncable/test/server/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 require "active_support/core_ext/hash/indifferent_access"
diff --git a/actioncable/test/server/broadcasting_test.rb b/actioncable/test/server/broadcasting_test.rb
index b941eb1e4f..ed377b7d5d 100644
--- a/actioncable/test/server/broadcasting_test.rb
+++ b/actioncable/test/server/broadcasting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/stubs/global_id.rb b/actioncable/test/stubs/global_id.rb
index 374503487d..334f0d03e8 100644
--- a/actioncable/test/stubs/global_id.rb
+++ b/actioncable/test/stubs/global_id.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class GlobalID
   attr_reader :uri
   delegate :to_param, :to_s, to: :uri
diff --git a/actioncable/test/stubs/room.rb b/actioncable/test/stubs/room.rb
index 662200aa68..1664b07d12 100644
--- a/actioncable/test/stubs/room.rb
+++ b/actioncable/test/stubs/room.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Room
   attr_reader :id, :name
 
diff --git a/actioncable/test/stubs/test_adapter.rb b/actioncable/test/stubs/test_adapter.rb
index 0d23576d2c..bbd142b287 100644
--- a/actioncable/test/stubs/test_adapter.rb
+++ b/actioncable/test/stubs/test_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class SuccessAdapter < ActionCable::SubscriptionAdapter::Base
   def broadcast(channel, payload)
   end
diff --git a/actioncable/test/stubs/test_connection.rb b/actioncable/test/stubs/test_connection.rb
index c543518929..cd2e219d88 100644
--- a/actioncable/test/stubs/test_connection.rb
+++ b/actioncable/test/stubs/test_connection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "stubs/user"
 
 class TestConnection
diff --git a/actioncable/test/stubs/test_server.rb b/actioncable/test/stubs/test_server.rb
index fc5b0df6bc..5bf2a151dc 100644
--- a/actioncable/test/stubs/test_server.rb
+++ b/actioncable/test/stubs/test_server.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "ostruct"
 
 class TestServer
diff --git a/actioncable/test/stubs/user.rb b/actioncable/test/stubs/user.rb
index e6b917b281..a66b4f87d5 100644
--- a/actioncable/test/stubs/user.rb
+++ b/actioncable/test/stubs/user.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class User
   attr_reader :name
 
diff --git a/actioncable/test/subscription_adapter/async_test.rb b/actioncable/test/subscription_adapter/async_test.rb
index 0b5bfb2fa9..8a447c7a4f 100644
--- a/actioncable/test/subscription_adapter/async_test.rb
+++ b/actioncable/test/subscription_adapter/async_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require_relative "common"
 
diff --git a/actioncable/test/subscription_adapter/base_test.rb b/actioncable/test/subscription_adapter/base_test.rb
index 15ce40b1c1..212ea49d2f 100644
--- a/actioncable/test/subscription_adapter/base_test.rb
+++ b/actioncable/test/subscription_adapter/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "stubs/test_server"
 
diff --git a/actioncable/test/subscription_adapter/channel_prefix.rb b/actioncable/test/subscription_adapter/channel_prefix.rb
index 71f993b72a..9ad659912e 100644
--- a/actioncable/test/subscription_adapter/channel_prefix.rb
+++ b/actioncable/test/subscription_adapter/channel_prefix.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 
 class ActionCable::Server::WithIndependentConfig < ActionCable::Server::Base
diff --git a/actioncable/test/subscription_adapter/common.rb b/actioncable/test/subscription_adapter/common.rb
index 10639cb112..3aa88c2caa 100644
--- a/actioncable/test/subscription_adapter/common.rb
+++ b/actioncable/test/subscription_adapter/common.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require "concurrent"
 
diff --git a/actioncable/test/subscription_adapter/evented_redis_test.rb b/actioncable/test/subscription_adapter/evented_redis_test.rb
index 33aab4672b..1c99031ab0 100644
--- a/actioncable/test/subscription_adapter/evented_redis_test.rb
+++ b/actioncable/test/subscription_adapter/evented_redis_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require_relative "common"
 require_relative "channel_prefix"
diff --git a/actioncable/test/subscription_adapter/inline_test.rb b/actioncable/test/subscription_adapter/inline_test.rb
index a3d83c07fc..eafa3df2df 100644
--- a/actioncable/test/subscription_adapter/inline_test.rb
+++ b/actioncable/test/subscription_adapter/inline_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require_relative "common"
 
diff --git a/actioncable/test/subscription_adapter/postgresql_test.rb b/actioncable/test/subscription_adapter/postgresql_test.rb
index 4534846e6e..ada4c2e2bd 100644
--- a/actioncable/test/subscription_adapter/postgresql_test.rb
+++ b/actioncable/test/subscription_adapter/postgresql_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require_relative "common"
 
diff --git a/actioncable/test/subscription_adapter/redis_test.rb b/actioncable/test/subscription_adapter/redis_test.rb
index 64dbd74a60..60596dd205 100644
--- a/actioncable/test/subscription_adapter/redis_test.rb
+++ b/actioncable/test/subscription_adapter/redis_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 require_relative "common"
 require_relative "channel_prefix"
diff --git a/actioncable/test/subscription_adapter/subscriber_map_test.rb b/actioncable/test/subscription_adapter/subscriber_map_test.rb
index ee36dd7a22..76b984c849 100644
--- a/actioncable/test/subscription_adapter/subscriber_map_test.rb
+++ b/actioncable/test/subscription_adapter/subscriber_map_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 
 class SubscriberMapTest < ActionCable::TestCase
diff --git a/actioncable/test/test_helper.rb b/actioncable/test/test_helper.rb
index b9d407fb6d..5d246c2b76 100644
--- a/actioncable/test/test_helper.rb
+++ b/actioncable/test/test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_cable"
 require "active_support/testing/autorun"
 
diff --git a/actioncable/test/worker_test.rb b/actioncable/test/worker_test.rb
index 2512df59e8..3385593f74 100644
--- a/actioncable/test/worker_test.rb
+++ b/actioncable/test/worker_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "test_helper"
 
 class WorkerTest < ActiveSupport::TestCase
diff --git a/actionmailer/Rakefile b/actionmailer/Rakefile
index 942c14b2d6..6f05d236d9 100644
--- a/actionmailer/Rakefile
+++ b/actionmailer/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 desc "Default Task"
diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
index 66022602e3..ae908ddda7 100644
--- a/actionmailer/actionmailer.gemspec
+++ b/actionmailer/actionmailer.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actionmailer/bin/test b/actionmailer/bin/test
index c53377cc97..470ce93f10 100755
--- a/actionmailer/bin/test
+++ b/actionmailer/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/actionmailer/lib/action_mailer.rb b/actionmailer/lib/action_mailer.rb
index 16dfe53e18..8e59f033d0 100644
--- a/actionmailer/lib/action_mailer.rb
+++ b/actionmailer/lib/action_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 782c369961..f8aa54bd44 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "mail"
 require "action_mailer/collector"
 require "active_support/core_ext/string/inflections"
diff --git a/actionmailer/lib/action_mailer/collector.rb b/actionmailer/lib/action_mailer/collector.rb
index c17715bac2..d97a73d65a 100644
--- a/actionmailer/lib/action_mailer/collector.rb
+++ b/actionmailer/lib/action_mailer/collector.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_controller/collector"
 require "active_support/core_ext/hash/reverse_merge"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionmailer/lib/action_mailer/delivery_job.rb b/actionmailer/lib/action_mailer/delivery_job.rb
index 010edf5800..a617daa87e 100644
--- a/actionmailer/lib/action_mailer/delivery_job.rb
+++ b/actionmailer/lib/action_mailer/delivery_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/delivery_methods.rb b/actionmailer/lib/action_mailer/delivery_methods.rb
index f4897e2b98..93ae10fd70 100644
--- a/actionmailer/lib/action_mailer/delivery_methods.rb
+++ b/actionmailer/lib/action_mailer/delivery_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "tmpdir"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index c9bf5b3f75..f5594ef928 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionMailer
   # Returns the version of the currently loaded Action Mailer as a <tt>Gem::Version</tt>.
   def self.gem_version
diff --git a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
index 925926ba46..980415afe0 100644
--- a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
+++ b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "base64"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/log_subscriber.rb b/actionmailer/lib/action_mailer/log_subscriber.rb
index 4f8aa98aaf..2c058ccf66 100644
--- a/actionmailer/lib/action_mailer/log_subscriber.rb
+++ b/actionmailer/lib/action_mailer/log_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/log_subscriber"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/mail_helper.rb b/actionmailer/lib/action_mailer/mail_helper.rb
index 69b6aebd8f..e04fc08866 100644
--- a/actionmailer/lib/action_mailer/mail_helper.rb
+++ b/actionmailer/lib/action_mailer/mail_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionMailer
   # Provides helper methods for ActionMailer::Base that can be used for easily
   # formatting messages, accessing mailer or message instances, and the
diff --git a/actionmailer/lib/action_mailer/message_delivery.rb b/actionmailer/lib/action_mailer/message_delivery.rb
index a13a8a7ebe..0b54e12431 100644
--- a/actionmailer/lib/action_mailer/message_delivery.rb
+++ b/actionmailer/lib/action_mailer/message_delivery.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "delegate"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/parameterized.rb b/actionmailer/lib/action_mailer/parameterized.rb
index 5a1adfca8f..3acacc1f14 100644
--- a/actionmailer/lib/action_mailer/parameterized.rb
+++ b/actionmailer/lib/action_mailer/parameterized.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionMailer
   # Provides the option to parameterize mailers in order to share instance variable
   # setup, processing, and common headers.
diff --git a/actionmailer/lib/action_mailer/preview.rb b/actionmailer/lib/action_mailer/preview.rb
index 8053bf9eba..4f72eca930 100644
--- a/actionmailer/lib/action_mailer/preview.rb
+++ b/actionmailer/lib/action_mailer/preview.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/descendants_tracker"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index 65a23e1ae7..913df8cf93 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job/railtie"
 require "action_mailer"
 require "rails"
diff --git a/actionmailer/lib/action_mailer/rescuable.rb b/actionmailer/lib/action_mailer/rescuable.rb
index 7e8a9642b6..f2eabfa057 100644
--- a/actionmailer/lib/action_mailer/rescuable.rb
+++ b/actionmailer/lib/action_mailer/rescuable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionMailer #:nodoc:
   # Provides `rescue_from` for mailers. Wraps mailer action processing,
   # mail job processing, and mail delivery.
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index 1aee49d791..9ead03a40c 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/test_case"
 require "rails-dom-testing"
 
diff --git a/actionmailer/lib/action_mailer/test_helper.rb b/actionmailer/lib/action_mailer/test_helper.rb
index dad260d1b6..c30fb1fc18 100644
--- a/actionmailer/lib/action_mailer/test_helper.rb
+++ b/actionmailer/lib/action_mailer/test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index b0cfa19891..8452d6370e 100644
--- a/actionmailer/lib/action_mailer/version.rb
+++ b/actionmailer/lib/action_mailer/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionMailer
diff --git a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
index 335f991dec..bc21b07109 100644
--- a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
+++ b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class MailerGenerator < NamedBase
diff --git a/actionmailer/test/abstract_unit.rb b/actionmailer/test/abstract_unit.rb
index f71ca117d2..dbfdb07e6e 100644
--- a/actionmailer/test/abstract_unit.rb
+++ b/actionmailer/test/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/reporting"
 
 # These are the normal settings that will be set up by Railties
diff --git a/actionmailer/test/assert_select_email_test.rb b/actionmailer/test/assert_select_email_test.rb
index 0a99e0c8f3..bf14fe0853 100644
--- a/actionmailer/test/assert_select_email_test.rb
+++ b/actionmailer/test/assert_select_email_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class AssertSelectEmailTest < ActionMailer::TestCase
diff --git a/actionmailer/test/asset_host_test.rb b/actionmailer/test/asset_host_test.rb
index e2b614c568..812df01a34 100644
--- a/actionmailer/test/asset_host_test.rb
+++ b/actionmailer/test/asset_host_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller"
 
diff --git a/actionmailer/test/base_test.rb b/actionmailer/test/base_test.rb
index 1aee95b45a..06d4ea197c 100644
--- a/actionmailer/test/base_test.rb
+++ b/actionmailer/test/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "set"
 
diff --git a/actionmailer/test/caching_test.rb b/actionmailer/test/caching_test.rb
index d491bba905..e76466439e 100644
--- a/actionmailer/test/caching_test.rb
+++ b/actionmailer/test/caching_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "abstract_unit"
 require "mailers/base_mailer"
diff --git a/actionmailer/test/delivery_methods_test.rb b/actionmailer/test/delivery_methods_test.rb
index 23a501862c..f64a69019f 100644
--- a/actionmailer/test/delivery_methods_test.rb
+++ b/actionmailer/test/delivery_methods_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MyCustomDelivery
diff --git a/actionmailer/test/i18n_with_controller_test.rb b/actionmailer/test/i18n_with_controller_test.rb
index df7e969042..4f09339800 100644
--- a/actionmailer/test/i18n_with_controller_test.rb
+++ b/actionmailer/test/i18n_with_controller_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_view"
 require "action_controller"
diff --git a/actionmailer/test/log_subscriber_test.rb b/actionmailer/test/log_subscriber_test.rb
index fabc7c3669..799c6144d7 100644
--- a/actionmailer/test/log_subscriber_test.rb
+++ b/actionmailer/test/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "mailers/base_mailer"
 require "active_support/log_subscriber/test_helper"
diff --git a/actionmailer/test/mail_helper_test.rb b/actionmailer/test/mail_helper_test.rb
index da1241a4e2..6042548aef 100644
--- a/actionmailer/test/mail_helper_test.rb
+++ b/actionmailer/test/mail_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class HelperMailer < ActionMailer::Base
diff --git a/actionmailer/test/mail_layout_test.rb b/actionmailer/test/mail_layout_test.rb
index ac66a733c6..73059d782d 100644
--- a/actionmailer/test/mail_layout_test.rb
+++ b/actionmailer/test/mail_layout_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class AutoLayoutMailer < ActionMailer::Base
diff --git a/actionmailer/test/mailers/asset_mailer.rb b/actionmailer/test/mailers/asset_mailer.rb
index a59000382c..1cf15128d2 100644
--- a/actionmailer/test/mailers/asset_mailer.rb
+++ b/actionmailer/test/mailers/asset_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AssetMailer < ActionMailer::Base
   self.mailer_name = "asset_mailer"
 
diff --git a/actionmailer/test/mailers/base_mailer.rb b/actionmailer/test/mailers/base_mailer.rb
index a339ef190d..2a8884959c 100644
--- a/actionmailer/test/mailers/base_mailer.rb
+++ b/actionmailer/test/mailers/base_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class BaseMailer < ActionMailer::Base
   self.mailer_name = "base_mailer"
 
diff --git a/actionmailer/test/mailers/caching_mailer.rb b/actionmailer/test/mailers/caching_mailer.rb
index fa548b98e5..92d3cff7c9 100644
--- a/actionmailer/test/mailers/caching_mailer.rb
+++ b/actionmailer/test/mailers/caching_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CachingMailer < ActionMailer::Base
   self.mailer_name = "caching_mailer"
 
diff --git a/actionmailer/test/mailers/delayed_mailer.rb b/actionmailer/test/mailers/delayed_mailer.rb
index 21eded8d05..cae4ec2f48 100644
--- a/actionmailer/test/mailers/delayed_mailer.rb
+++ b/actionmailer/test/mailers/delayed_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job/arguments"
 
 class DelayedMailerError < StandardError; end
diff --git a/actionmailer/test/mailers/params_mailer.rb b/actionmailer/test/mailers/params_mailer.rb
index 94f8da2201..4c0fae6d91 100644
--- a/actionmailer/test/mailers/params_mailer.rb
+++ b/actionmailer/test/mailers/params_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ParamsMailer < ActionMailer::Base
   before_action { @inviter, @invitee = params[:inviter], params[:invitee] }
 
diff --git a/actionmailer/test/mailers/proc_mailer.rb b/actionmailer/test/mailers/proc_mailer.rb
index f69615e768..2487db9eb9 100644
--- a/actionmailer/test/mailers/proc_mailer.rb
+++ b/actionmailer/test/mailers/proc_mailer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ProcMailer < ActionMailer::Base
   default to: "system@test.lindsaar.net",
           "X-Proc-Method" => Proc.new { Time.now.to_i.to_s },
diff --git a/actionmailer/test/message_delivery_test.rb b/actionmailer/test/message_delivery_test.rb
index 58675e6d37..51f10b0bf1 100644
--- a/actionmailer/test/message_delivery_test.rb
+++ b/actionmailer/test/message_delivery_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_job"
 require "mailers/delayed_mailer"
diff --git a/actionmailer/test/parameterized_test.rb b/actionmailer/test/parameterized_test.rb
index 4a53df37fa..e988fffcb9 100644
--- a/actionmailer/test/parameterized_test.rb
+++ b/actionmailer/test/parameterized_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_job"
 require "mailers/params_mailer"
diff --git a/actionmailer/test/test_case_test.rb b/actionmailer/test/test_case_test.rb
index fa8a55163c..193d107b0a 100644
--- a/actionmailer/test/test_case_test.rb
+++ b/actionmailer/test/test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestTestMailer < ActionMailer::Base
diff --git a/actionmailer/test/test_helper_test.rb b/actionmailer/test/test_helper_test.rb
index cbb7572fd8..876e9b0634 100644
--- a/actionmailer/test/test_helper_test.rb
+++ b/actionmailer/test/test_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/testing/stream"
 
diff --git a/actionmailer/test/url_test.rb b/actionmailer/test/url_test.rb
index 08c1bf1d23..6dbfb3a1ff 100644
--- a/actionmailer/test/url_test.rb
+++ b/actionmailer/test/url_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller"
 
diff --git a/actionpack/Rakefile b/actionpack/Rakefile
index 984951f96d..69408c8aab 100644
--- a/actionpack/Rakefile
+++ b/actionpack/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 test_files = Dir.glob("test/**/*_test.rb")
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index a09c23bdb5..294cc45593 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actionpack/bin/test b/actionpack/bin/test
index c53377cc97..470ce93f10 100755
--- a/actionpack/bin/test
+++ b/actionpack/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/actionpack/lib/abstract_controller.rb b/actionpack/lib/abstract_controller.rb
index 5d56d71aa1..8bd965b198 100644
--- a/actionpack/lib/abstract_controller.rb
+++ b/actionpack/lib/abstract_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_pack"
 require "active_support/rails"
 require "active_support/i18n"
diff --git a/actionpack/lib/abstract_controller/asset_paths.rb b/actionpack/lib/abstract_controller/asset_paths.rb
index 96031b3aa0..e6170228d9 100644
--- a/actionpack/lib/abstract_controller/asset_paths.rb
+++ b/actionpack/lib/abstract_controller/asset_paths.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   module AssetPaths #:nodoc:
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/abstract_controller/base.rb b/actionpack/lib/abstract_controller/base.rb
index 0046baacd0..dc79820a82 100644
--- a/actionpack/lib/abstract_controller/base.rb
+++ b/actionpack/lib/abstract_controller/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_controller/error"
 require "active_support/configurable"
 require "active_support/descendants_tracker"
diff --git a/actionpack/lib/abstract_controller/caching.rb b/actionpack/lib/abstract_controller/caching.rb
index 272ec79970..30e3d4426c 100644
--- a/actionpack/lib/abstract_controller/caching.rb
+++ b/actionpack/lib/abstract_controller/caching.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   module Caching
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/abstract_controller/caching/fragments.rb b/actionpack/lib/abstract_controller/caching/fragments.rb
index 1fe653cd12..14e4a82523 100644
--- a/actionpack/lib/abstract_controller/caching/fragments.rb
+++ b/actionpack/lib/abstract_controller/caching/fragments.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   module Caching
     # Fragment caching is used for caching various blocks within
diff --git a/actionpack/lib/abstract_controller/callbacks.rb b/actionpack/lib/abstract_controller/callbacks.rb
index c0ba1bff96..e4400e8704 100644
--- a/actionpack/lib/abstract_controller/callbacks.rb
+++ b/actionpack/lib/abstract_controller/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   # = Abstract Controller Callbacks
   #
diff --git a/actionpack/lib/abstract_controller/collector.rb b/actionpack/lib/abstract_controller/collector.rb
index 2910a69ca4..40ae5aa1ca 100644
--- a/actionpack/lib/abstract_controller/collector.rb
+++ b/actionpack/lib/abstract_controller/collector.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/mime_type"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/error.rb b/actionpack/lib/abstract_controller/error.rb
index 450a6fc9df..7fafce4dd4 100644
--- a/actionpack/lib/abstract_controller/error.rb
+++ b/actionpack/lib/abstract_controller/error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   class Error < StandardError #:nodoc:
   end
diff --git a/actionpack/lib/abstract_controller/helpers.rb b/actionpack/lib/abstract_controller/helpers.rb
index 6cd16b0286..2e50637c39 100644
--- a/actionpack/lib/abstract_controller/helpers.rb
+++ b/actionpack/lib/abstract_controller/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/dependencies"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/logger.rb b/actionpack/lib/abstract_controller/logger.rb
index 61df54fff2..c31ea6c5b5 100644
--- a/actionpack/lib/abstract_controller/logger.rb
+++ b/actionpack/lib/abstract_controller/logger.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/benchmarkable"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/railties/routes_helpers.rb b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
index 0a6a5315b3..14b574e322 100644
--- a/actionpack/lib/abstract_controller/railties/routes_helpers.rb
+++ b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   module Railties
     module RoutesHelpers
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index b822d36e72..54af938a93 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_controller/error"
 require "action_view"
 require "action_view/view_paths"
diff --git a/actionpack/lib/abstract_controller/translation.rb b/actionpack/lib/abstract_controller/translation.rb
index 2cfc8d1484..e4ac95df50 100644
--- a/actionpack/lib/abstract_controller/translation.rb
+++ b/actionpack/lib/abstract_controller/translation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   module Translation
     # Delegates to <tt>I18n.translate</tt>. Also aliased as <tt>t</tt>.
diff --git a/actionpack/lib/abstract_controller/url_for.rb b/actionpack/lib/abstract_controller/url_for.rb
index ddde3eacc2..72d07b0927 100644
--- a/actionpack/lib/abstract_controller/url_for.rb
+++ b/actionpack/lib/abstract_controller/url_for.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbstractController
   # Includes +url_for+ into the host class (e.g. an abstract controller or mailer). The class
   # has to provide a +RouteSet+ by implementing the <tt>_routes</tt> methods. Otherwise, an
diff --git a/actionpack/lib/action_controller.rb b/actionpack/lib/action_controller.rb
index 806797bc50..50f20aa789 100644
--- a/actionpack/lib/action_controller.rb
+++ b/actionpack/lib/action_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/rails"
 require "abstract_controller"
 require "action_dispatch"
diff --git a/actionpack/lib/action_controller/api.rb b/actionpack/lib/action_controller/api.rb
index 3060afd1f8..94698df730 100644
--- a/actionpack/lib/action_controller/api.rb
+++ b/actionpack/lib/action_controller/api.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view"
 require "action_controller"
 require "action_controller/log_subscriber"
diff --git a/actionpack/lib/action_controller/api/api_rendering.rb b/actionpack/lib/action_controller/api/api_rendering.rb
index 5ff11cf855..3a08d28c39 100644
--- a/actionpack/lib/action_controller/api/api_rendering.rb
+++ b/actionpack/lib/action_controller/api/api_rendering.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module ApiRendering
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index ff9e6702dc..8c2b111f89 100644
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view"
 require "action_controller/log_subscriber"
 require "action_controller/metal/params_wrapper"
diff --git a/actionpack/lib/action_controller/caching.rb b/actionpack/lib/action_controller/caching.rb
index 86c1194ce0..954265ad97 100644
--- a/actionpack/lib/action_controller/caching.rb
+++ b/actionpack/lib/action_controller/caching.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # \Caching is a cheap way of speeding up slow applications by keeping the result of
   # calculations, renderings, and database calls around for subsequent requests.
diff --git a/actionpack/lib/action_controller/form_builder.rb b/actionpack/lib/action_controller/form_builder.rb
index f636c81829..f2656ca894 100644
--- a/actionpack/lib/action_controller/form_builder.rb
+++ b/actionpack/lib/action_controller/form_builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # Override the default form builder for all views rendered by this
   # controller and any of its descendants. Accepts a subclass of
diff --git a/actionpack/lib/action_controller/log_subscriber.rb b/actionpack/lib/action_controller/log_subscriber.rb
index 61f8adb2c1..5d75393897 100644
--- a/actionpack/lib/action_controller/log_subscriber.rb
+++ b/actionpack/lib/action_controller/log_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   class LogSubscriber < ActiveSupport::LogSubscriber
     INTERNAL_PARAMS = %w(controller action format _method only_path)
diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index 5d9983eb49..96c708f45a 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "action_dispatch/middleware/stack"
 require "action_dispatch/http/request"
diff --git a/actionpack/lib/action_controller/metal/basic_implicit_render.rb b/actionpack/lib/action_controller/metal/basic_implicit_render.rb
index b993a6afdf..cef65a362c 100644
--- a/actionpack/lib/action_controller/metal/basic_implicit_render.rb
+++ b/actionpack/lib/action_controller/metal/basic_implicit_render.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module BasicImplicitRender # :nodoc:
     def send_action(method, *args)
diff --git a/actionpack/lib/action_controller/metal/conditional_get.rb b/actionpack/lib/action_controller/metal/conditional_get.rb
index cbf87d2ec9..0525252c7c 100644
--- a/actionpack/lib/action_controller/metal/conditional_get.rb
+++ b/actionpack/lib/action_controller/metal/conditional_get.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/cookies.rb b/actionpack/lib/action_controller/metal/cookies.rb
index 6616d9665e..44925641a1 100644
--- a/actionpack/lib/action_controller/metal/cookies.rb
+++ b/actionpack/lib/action_controller/metal/cookies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController #:nodoc:
   module Cookies
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index 333efcf6aa..731e03e2fc 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_controller/metal/exceptions"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/etag_with_flash.rb b/actionpack/lib/action_controller/metal/etag_with_flash.rb
index f5f9c6267a..7bd338bd7c 100644
--- a/actionpack/lib/action_controller/metal/etag_with_flash.rb
+++ b/actionpack/lib/action_controller/metal/etag_with_flash.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # When you're using the flash, it's generally used as a conditional on the view.
   # This means the content of the view depends on the flash. Which in turn means
diff --git a/actionpack/lib/action_controller/metal/etag_with_template_digest.rb b/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
index 4c563d5072..69c3979a0e 100644
--- a/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
+++ b/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # When our views change, they should bubble up into HTTP cache freshness
   # and bust browser caches. So the template digest for the current action
diff --git a/actionpack/lib/action_controller/metal/exceptions.rb b/actionpack/lib/action_controller/metal/exceptions.rb
index 9bff006e2b..175dd9eb9e 100644
--- a/actionpack/lib/action_controller/metal/exceptions.rb
+++ b/actionpack/lib/action_controller/metal/exceptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   class ActionControllerError < StandardError #:nodoc:
   end
diff --git a/actionpack/lib/action_controller/metal/flash.rb b/actionpack/lib/action_controller/metal/flash.rb
index e0708a9421..24d1097ebe 100644
--- a/actionpack/lib/action_controller/metal/flash.rb
+++ b/actionpack/lib/action_controller/metal/flash.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController #:nodoc:
   module Flash
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/force_ssl.rb b/actionpack/lib/action_controller/metal/force_ssl.rb
index 99daa20d1c..73e67573ca 100644
--- a/actionpack/lib/action_controller/metal/force_ssl.rb
+++ b/actionpack/lib/action_controller/metal/force_ssl.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/hash/slice"
 
diff --git a/actionpack/lib/action_controller/metal/head.rb b/actionpack/lib/action_controller/metal/head.rb
index 33a1e4d70f..0c50894bce 100644
--- a/actionpack/lib/action_controller/metal/head.rb
+++ b/actionpack/lib/action_controller/metal/head.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module Head
     # Returns a response that has no content (merely headers). The options
diff --git a/actionpack/lib/action_controller/metal/helpers.rb b/actionpack/lib/action_controller/metal/helpers.rb
index ad3aaf4232..913a4b9a04 100644
--- a/actionpack/lib/action_controller/metal/helpers.rb
+++ b/actionpack/lib/action_controller/metal/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # The \Rails framework provides a large number of helpers for working with assets, dates, forms,
   # numbers and model objects, to name a few. These helpers are available to all templates
diff --git a/actionpack/lib/action_controller/metal/http_authentication.rb b/actionpack/lib/action_controller/metal/http_authentication.rb
index 1d38e3504a..d8bc895265 100644
--- a/actionpack/lib/action_controller/metal/http_authentication.rb
+++ b/actionpack/lib/action_controller/metal/http_authentication.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "base64"
 require "active_support/security_utils"
 
diff --git a/actionpack/lib/action_controller/metal/implicit_render.rb b/actionpack/lib/action_controller/metal/implicit_render.rb
index 3cfbf01805..eeb27f99f4 100644
--- a/actionpack/lib/action_controller/metal/implicit_render.rb
+++ b/actionpack/lib/action_controller/metal/implicit_render.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # Handles implicit rendering for a controller action that does not
   # explicitly respond with +render+, +respond_to+, +redirect+, or +head+.
diff --git a/actionpack/lib/action_controller/metal/instrumentation.rb b/actionpack/lib/action_controller/metal/instrumentation.rb
index d9be52bc71..2485d27cec 100644
--- a/actionpack/lib/action_controller/metal/instrumentation.rb
+++ b/actionpack/lib/action_controller/metal/instrumentation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "benchmark"
 require "abstract_controller/logger"
 
diff --git a/actionpack/lib/action_controller/metal/live.rb b/actionpack/lib/action_controller/metal/live.rb
index 4bd59ea482..a607ee2309 100644
--- a/actionpack/lib/action_controller/metal/live.rb
+++ b/actionpack/lib/action_controller/metal/live.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/response"
 require "delegate"
 require "active_support/json"
diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index ca4bb100d3..96bd548268 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_controller/collector"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/parameter_encoding.rb b/actionpack/lib/action_controller/metal/parameter_encoding.rb
index b16c2f636a..ecc691619e 100644
--- a/actionpack/lib/action_controller/metal/parameter_encoding.rb
+++ b/actionpack/lib/action_controller/metal/parameter_encoding.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # Specify binary encoding for parameters for a given action.
   module ParameterEncoding
diff --git a/actionpack/lib/action_controller/metal/params_wrapper.rb b/actionpack/lib/action_controller/metal/params_wrapper.rb
index 86919aebf5..44151c9f71 100644
--- a/actionpack/lib/action_controller/metal/params_wrapper.rb
+++ b/actionpack/lib/action_controller/metal/params_wrapper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/module/anonymous"
diff --git a/actionpack/lib/action_controller/metal/redirecting.rb b/actionpack/lib/action_controller/metal/redirecting.rb
index c021699b0d..fdfe82f96b 100644
--- a/actionpack/lib/action_controller/metal/redirecting.rb
+++ b/actionpack/lib/action_controller/metal/redirecting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module Redirecting
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/renderers.rb b/actionpack/lib/action_controller/metal/renderers.rb
index 79314fa505..23c21b0501 100644
--- a/actionpack/lib/action_controller/metal/renderers.rb
+++ b/actionpack/lib/action_controller/metal/renderers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index ff75c558ee..67f207afc2 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/request_forgery_protection.rb b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
index 0616840a56..5051c02a62 100644
--- a/actionpack/lib/action_controller/metal/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/session/abstract/id"
 require "action_controller/metal/exceptions"
 require "active_support/security_utils"
diff --git a/actionpack/lib/action_controller/metal/rescue.rb b/actionpack/lib/action_controller/metal/rescue.rb
index 35e3cae985..25757938f5 100644
--- a/actionpack/lib/action_controller/metal/rescue.rb
+++ b/actionpack/lib/action_controller/metal/rescue.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController #:nodoc:
   # This module is responsible for providing `rescue_from` helpers
   # to controllers and configuring when detailed exceptions must be
diff --git a/actionpack/lib/action_controller/metal/streaming.rb b/actionpack/lib/action_controller/metal/streaming.rb
index 407ae95086..58cf60ad2a 100644
--- a/actionpack/lib/action_controller/metal/streaming.rb
+++ b/actionpack/lib/action_controller/metal/streaming.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/chunked"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index 6f57a3d626..a1b8b7cd6e 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/array/wrap"
diff --git a/actionpack/lib/action_controller/metal/testing.rb b/actionpack/lib/action_controller/metal/testing.rb
index 4fd0fb40de..9bb416178a 100644
--- a/actionpack/lib/action_controller/metal/testing.rb
+++ b/actionpack/lib/action_controller/metal/testing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module Testing
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/url_for.rb b/actionpack/lib/action_controller/metal/url_for.rb
index 068ad00130..21ed5b4ec8 100644
--- a/actionpack/lib/action_controller/metal/url_for.rb
+++ b/actionpack/lib/action_controller/metal/url_for.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   # Includes +url_for+ into the host class. The class has to provide a +RouteSet+ by implementing
   # the <tt>_routes</tt> method. Otherwise, an exception will be raised.
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index 0eec7b383c..fadfc8de60 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails"
 require "action_controller"
 require "action_dispatch/railtie"
diff --git a/actionpack/lib/action_controller/railties/helpers.rb b/actionpack/lib/action_controller/railties/helpers.rb
index 4417ebdedb..3985c6b273 100644
--- a/actionpack/lib/action_controller/railties/helpers.rb
+++ b/actionpack/lib/action_controller/railties/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module Railties
     module Helpers
diff --git a/actionpack/lib/action_controller/renderer.rb b/actionpack/lib/action_controller/renderer.rb
index c35a778d46..cbb719d8b2 100644
--- a/actionpack/lib/action_controller/renderer.rb
+++ b/actionpack/lib/action_controller/renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/template_assertions.rb b/actionpack/lib/action_controller/template_assertions.rb
index 086c42fea7..0179f4afcd 100644
--- a/actionpack/lib/action_controller/template_assertions.rb
+++ b/actionpack/lib/action_controller/template_assertions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionController
   module TemplateAssertions
     def assert_template(options = {}, message = nil)
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index 9df9381be8..bc42d50205 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/session/abstract/id"
 require "active_support/core_ext/hash/conversions"
 require "active_support/core_ext/object/to_query"
diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb
index 1f3f6d615a..303790e96d 100644
--- a/actionpack/lib/action_dispatch.rb
+++ b/actionpack/lib/action_dispatch.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionpack/lib/action_dispatch/http/cache.rb b/actionpack/lib/action_dispatch/http/cache.rb
index 2cbb3facb7..985e0fb972 100644
--- a/actionpack/lib/action_dispatch/http/cache.rb
+++ b/actionpack/lib/action_dispatch/http/cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Http
     module Cache
diff --git a/actionpack/lib/action_dispatch/http/filter_parameters.rb b/actionpack/lib/action_dispatch/http/filter_parameters.rb
index 872c2cb9d3..077ab2561f 100644
--- a/actionpack/lib/action_dispatch/http/filter_parameters.rb
+++ b/actionpack/lib/action_dispatch/http/filter_parameters.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/parameter_filter"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/filter_redirect.rb b/actionpack/lib/action_dispatch/http/filter_redirect.rb
index 91f1ebeb79..fc3c44582a 100644
--- a/actionpack/lib/action_dispatch/http/filter_redirect.rb
+++ b/actionpack/lib/action_dispatch/http/filter_redirect.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Http
     module FilterRedirect
diff --git a/actionpack/lib/action_dispatch/http/headers.rb b/actionpack/lib/action_dispatch/http/headers.rb
index 59323d26d6..3c03976f03 100644
--- a/actionpack/lib/action_dispatch/http/headers.rb
+++ b/actionpack/lib/action_dispatch/http/headers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Http
     # Provides access to the request's HTTP headers from the environment.
diff --git a/actionpack/lib/action_dispatch/http/mime_negotiation.rb b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
index 9e97b14170..5994a01c78 100644
--- a/actionpack/lib/action_dispatch/http/mime_negotiation.rb
+++ b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 7dc3a175fb..74a3afab44 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # -*- frozen-string-literal: true -*-
 
 require "singleton"
diff --git a/actionpack/lib/action_dispatch/http/mime_types.rb b/actionpack/lib/action_dispatch/http/mime_types.rb
index 9ddb560d98..8b04174f1f 100644
--- a/actionpack/lib/action_dispatch/http/mime_types.rb
+++ b/actionpack/lib/action_dispatch/http/mime_types.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Build list of Mime types for HTTP responses
 # http://www.iana.org/assignments/media-types/
 
diff --git a/actionpack/lib/action_dispatch/http/parameter_filter.rb b/actionpack/lib/action_dispatch/http/parameter_filter.rb
index 8a53407323..1d2b4b902b 100644
--- a/actionpack/lib/action_dispatch/http/parameter_filter.rb
+++ b/actionpack/lib/action_dispatch/http/parameter_filter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/duplicable"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index 9723d78dfc..7c585dbe68 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Http
     module Parameters
diff --git a/actionpack/lib/action_dispatch/http/rack_cache.rb b/actionpack/lib/action_dispatch/http/rack_cache.rb
index dff27a568f..003ae4029d 100644
--- a/actionpack/lib/action_dispatch/http/rack_cache.rb
+++ b/actionpack/lib/action_dispatch/http/rack_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/cache"
 require "rack/cache/context"
 require "active_support/cache"
diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index bd3d7fb5b8..6d42404a98 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "stringio"
 
 require "active_support/inflector"
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 0b8f890907..4155c155da 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "action_dispatch/http/filter_redirect"
 require "action_dispatch/http/cache"
diff --git a/actionpack/lib/action_dispatch/http/upload.rb b/actionpack/lib/action_dispatch/http/upload.rb
index 03def91070..225272d66e 100644
--- a/actionpack/lib/action_dispatch/http/upload.rb
+++ b/actionpack/lib/action_dispatch/http/upload.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Http
     # Models uploaded files.
diff --git a/actionpack/lib/action_dispatch/http/url.rb b/actionpack/lib/action_dispatch/http/url.rb
index 513bf9eedc..f902fe36e0 100644
--- a/actionpack/lib/action_dispatch/http/url.rb
+++ b/actionpack/lib/action_dispatch/http/url.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey.rb b/actionpack/lib/action_dispatch/journey.rb
index d93d9473ed..d1cfc51f3e 100644
--- a/actionpack/lib/action_dispatch/journey.rb
+++ b/actionpack/lib/action_dispatch/journey.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/router"
 require "action_dispatch/journey/gtg/builder"
 require "action_dispatch/journey/gtg/simulator"
diff --git a/actionpack/lib/action_dispatch/journey/formatter.rb b/actionpack/lib/action_dispatch/journey/formatter.rb
index a6b16c83a3..326f4e52f9 100644
--- a/actionpack/lib/action_dispatch/journey/formatter.rb
+++ b/actionpack/lib/action_dispatch/journey/formatter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_controller/metal/exceptions"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/builder.rb b/actionpack/lib/action_dispatch/journey/gtg/builder.rb
index ed8b994408..0f8bed89bf 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/builder.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/gtg/transition_table"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/simulator.rb b/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
index 240536dd7c..62f052ced6 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "strscan"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb b/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
index b99a228c32..45aff287b1 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/nfa/dot"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nfa/builder.rb b/actionpack/lib/action_dispatch/journey/nfa/builder.rb
index 0796d98cfd..532f765094 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/builder.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/nfa/transition_table"
 require "action_dispatch/journey/gtg/transition_table"
 
diff --git a/actionpack/lib/action_dispatch/journey/nfa/dot.rb b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
index 8b1d40149b..8119e5d9da 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/dot.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     module NFA # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
index 284b734b39..324d0eed15 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "strscan"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
index 9cdb4a2496..543a670da0 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/nfa/dot"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nodes/node.rb b/actionpack/lib/action_dispatch/journey/nodes/node.rb
index 6f2cd48d93..0d874a84c9 100644
--- a/actionpack/lib/action_dispatch/journey/nodes/node.rb
+++ b/actionpack/lib/action_dispatch/journey/nodes/node.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/visitors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/parser_extras.rb b/actionpack/lib/action_dispatch/journey/parser_extras.rb
index 8f1a12f286..4c7e82d93c 100644
--- a/actionpack/lib/action_dispatch/journey/parser_extras.rb
+++ b/actionpack/lib/action_dispatch/journey/parser_extras.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/scanner"
 require "action_dispatch/journey/nodes/node"
 
diff --git a/actionpack/lib/action_dispatch/journey/path/pattern.rb b/actionpack/lib/action_dispatch/journey/path/pattern.rb
index d63eecb600..cf0108ec32 100644
--- a/actionpack/lib/action_dispatch/journey/path/pattern.rb
+++ b/actionpack/lib/action_dispatch/journey/path/pattern.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     module Path # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/route.rb b/actionpack/lib/action_dispatch/journey/route.rb
index 38aa45f942..0acbac1d9d 100644
--- a/actionpack/lib/action_dispatch/journey/route.rb
+++ b/actionpack/lib/action_dispatch/journey/route.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # :stopdoc:
   module Journey
diff --git a/actionpack/lib/action_dispatch/journey/router.rb b/actionpack/lib/action_dispatch/journey/router.rb
index f55b187cc8..d55e1399e4 100644
--- a/actionpack/lib/action_dispatch/journey/router.rb
+++ b/actionpack/lib/action_dispatch/journey/router.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey/router/utils"
 require "action_dispatch/journey/routes"
 require "action_dispatch/journey/formatter"
diff --git a/actionpack/lib/action_dispatch/journey/router/utils.rb b/actionpack/lib/action_dispatch/journey/router/utils.rb
index 87046f524f..1ac86d10d6 100644
--- a/actionpack/lib/action_dispatch/journey/router/utils.rb
+++ b/actionpack/lib/action_dispatch/journey/router/utils.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     class Router # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/routes.rb b/actionpack/lib/action_dispatch/journey/routes.rb
index bee2140c5f..f7b009109e 100644
--- a/actionpack/lib/action_dispatch/journey/routes.rb
+++ b/actionpack/lib/action_dispatch/journey/routes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     # The Routing table. Contains all routes for a system. Routes can be
diff --git a/actionpack/lib/action_dispatch/journey/visitors.rb b/actionpack/lib/action_dispatch/journey/visitors.rb
index 6670079241..335797f4b9 100644
--- a/actionpack/lib/action_dispatch/journey/visitors.rb
+++ b/actionpack/lib/action_dispatch/journey/visitors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # :stopdoc:
   module Journey
diff --git a/actionpack/lib/action_dispatch/middleware/callbacks.rb b/actionpack/lib/action_dispatch/middleware/callbacks.rb
index cc3b344d72..ff129cf96a 100644
--- a/actionpack/lib/action_dispatch/middleware/callbacks.rb
+++ b/actionpack/lib/action_dispatch/middleware/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # Provides callbacks to be executed before and after dispatching the request.
   class Callbacks
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb
index 6a9d54a32a..533925ebe1 100644
--- a/actionpack/lib/action_dispatch/middleware/cookies.rb
+++ b/actionpack/lib/action_dispatch/middleware/cookies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "active_support/key_generator"
 require "active_support/message_verifier"
diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index fe01c55116..336a775880 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "action_dispatch/middleware/exception_wrapper"
 require "action_dispatch/routing/inspector"
diff --git a/actionpack/lib/action_dispatch/middleware/debug_locks.rb b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
index 600b0a51b1..74b952528e 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_locks.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # This middleware can be used to diagnose deadlocks in the autoload interlock.
   #
diff --git a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
index 47ed09ecb5..08b4541d24 100644
--- a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
+++ b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "rack/utils"
 
diff --git a/actionpack/lib/action_dispatch/middleware/executor.rb b/actionpack/lib/action_dispatch/middleware/executor.rb
index 7423d59119..3d43f97a2b 100644
--- a/actionpack/lib/action_dispatch/middleware/executor.rb
+++ b/actionpack/lib/action_dispatch/middleware/executor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/body_proxy"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/flash.rb b/actionpack/lib/action_dispatch/middleware/flash.rb
index 3fe80cf03d..6b29ce63ba 100644
--- a/actionpack/lib/action_dispatch/middleware/flash.rb
+++ b/actionpack/lib/action_dispatch/middleware/flash.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/public_exceptions.rb b/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
index e37416d957..46f0f675b9 100644
--- a/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # When called, this middleware renders an error page. By default if an HTML
   # response is expected it will render static error pages from the `/public`
diff --git a/actionpack/lib/action_dispatch/middleware/reloader.rb b/actionpack/lib/action_dispatch/middleware/reloader.rb
index 989d6c3cd7..6d64b1424b 100644
--- a/actionpack/lib/action_dispatch/middleware/reloader.rb
+++ b/actionpack/lib/action_dispatch/middleware/reloader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # ActionDispatch::Reloader wraps the request with callbacks provided by ActiveSupport::Reloader
   # callbacks, intended to assist with code reloading during development.
diff --git a/actionpack/lib/action_dispatch/middleware/remote_ip.rb b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
index b5decc98b5..53d5a4918c 100644
--- a/actionpack/lib/action_dispatch/middleware/remote_ip.rb
+++ b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "ipaddr"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/request_id.rb b/actionpack/lib/action_dispatch/middleware/request_id.rb
index 6ac846e10b..1925ffd9dd 100644
--- a/actionpack/lib/action_dispatch/middleware/request_id.rb
+++ b/actionpack/lib/action_dispatch/middleware/request_id.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 require "active_support/core_ext/string/access"
 
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index 6af03da443..21ccf5a097 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/utils"
 require "rack/request"
 require "rack/session/abstract/id"
diff --git a/actionpack/lib/action_dispatch/middleware/session/cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
index 456febcfba..71274bc13a 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/middleware/session/abstract_store"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
index f71997a6d7..57d325a9d8 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "action_dispatch/middleware/session/abstract_store"
 require "rack/session/cookie"
diff --git a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
index 977b4c7031..ee2b1f26ad 100644
--- a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/middleware/session/abstract_store"
 begin
   require "rack/session/dalli"
diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index 5289b3cb87..5a99714ec2 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "action_dispatch/middleware/exception_wrapper"
 
diff --git a/actionpack/lib/action_dispatch/middleware/ssl.rb b/actionpack/lib/action_dispatch/middleware/ssl.rb
index 36faf6a7c6..557721c301 100644
--- a/actionpack/lib/action_dispatch/middleware/ssl.rb
+++ b/actionpack/lib/action_dispatch/middleware/ssl.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # This middleware is added to the stack when `config.force_ssl = true`, and is passed
   # the options set in `config.ssl_options`. It does three jobs to enforce secure HTTP
diff --git a/actionpack/lib/action_dispatch/middleware/stack.rb b/actionpack/lib/action_dispatch/middleware/stack.rb
index 66d07f57d5..6949b31e75 100644
--- a/actionpack/lib/action_dispatch/middleware/stack.rb
+++ b/actionpack/lib/action_dispatch/middleware/stack.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 require "active_support/dependencies"
 
diff --git a/actionpack/lib/action_dispatch/middleware/static.rb b/actionpack/lib/action_dispatch/middleware/static.rb
index 338e0d45a1..fb99f13a1c 100644
--- a/actionpack/lib/action_dispatch/middleware/static.rb
+++ b/actionpack/lib/action_dispatch/middleware/static.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/utils"
 require "active_support/core_ext/uri"
 
diff --git a/actionpack/lib/action_dispatch/railtie.rb b/actionpack/lib/action_dispatch/railtie.rb
index c865713b31..7662e164b8 100644
--- a/actionpack/lib/action_dispatch/railtie.rb
+++ b/actionpack/lib/action_dispatch/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/request/session.rb b/actionpack/lib/action_dispatch/request/session.rb
index 4f9e2e62d3..3547a8604f 100644
--- a/actionpack/lib/action_dispatch/request/session.rb
+++ b/actionpack/lib/action_dispatch/request/session.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/session/abstract/id"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/request/utils.rb b/actionpack/lib/action_dispatch/request/utils.rb
index 89c4d49e1a..4f79c4c21e 100644
--- a/actionpack/lib/action_dispatch/request/utils.rb
+++ b/actionpack/lib/action_dispatch/request/utils.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   class Request
     class Utils # :nodoc:
diff --git a/actionpack/lib/action_dispatch/routing.rb b/actionpack/lib/action_dispatch/routing.rb
index da0afa5e13..87dd1eba38 100644
--- a/actionpack/lib/action_dispatch/routing.rb
+++ b/actionpack/lib/action_dispatch/routing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/routing/endpoint.rb b/actionpack/lib/action_dispatch/routing/endpoint.rb
index e2dbf8a2cd..88aa13c3e8 100644
--- a/actionpack/lib/action_dispatch/routing/endpoint.rb
+++ b/actionpack/lib/action_dispatch/routing/endpoint.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Routing
     class Endpoint # :nodoc:
diff --git a/actionpack/lib/action_dispatch/routing/inspector.rb b/actionpack/lib/action_dispatch/routing/inspector.rb
index ba533d63d6..9aa4b92df2 100644
--- a/actionpack/lib/action_dispatch/routing/inspector.rb
+++ b/actionpack/lib/action_dispatch/routing/inspector.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "delegate"
 require "active_support/core_ext/string/strip"
 
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 1376469c2b..88deee5f5e 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 require "active_support/core_ext/enumerable"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index 6c26e2198e..e89ea8b21d 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Routing
     # Polymorphic URL helpers are methods for smart resolution to a named route call when
diff --git a/actionpack/lib/action_dispatch/routing/redirection.rb b/actionpack/lib/action_dispatch/routing/redirection.rb
index a87dfa4037..3bcb341758 100644
--- a/actionpack/lib/action_dispatch/routing/redirection.rb
+++ b/actionpack/lib/action_dispatch/routing/redirection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "active_support/core_ext/uri"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 3849316af5..d9f7180f51 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/journey"
 require "active_support/core_ext/object/to_query"
 require "active_support/core_ext/hash/slice"
diff --git a/actionpack/lib/action_dispatch/routing/routes_proxy.rb b/actionpack/lib/action_dispatch/routing/routes_proxy.rb
index 996d40e911..c1423f770f 100644
--- a/actionpack/lib/action_dispatch/routing/routes_proxy.rb
+++ b/actionpack/lib/action_dispatch/routing/routes_proxy.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/routing/url_for.rb b/actionpack/lib/action_dispatch/routing/url_for.rb
index deccd22f23..a9bdefa775 100644
--- a/actionpack/lib/action_dispatch/routing/url_for.rb
+++ b/actionpack/lib/action_dispatch/routing/url_for.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Routing
     # In <tt>config/routes.rb</tt> you define URL-to-controller mappings, but the reverse
diff --git a/actionpack/lib/action_dispatch/system_test_case.rb b/actionpack/lib/action_dispatch/system_test_case.rb
index 11f2ff4384..c39a135ce0 100644
--- a/actionpack/lib/action_dispatch/system_test_case.rb
+++ b/actionpack/lib/action_dispatch/system_test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "capybara/dsl"
 require "capybara/minitest"
 require "action_controller"
diff --git a/actionpack/lib/action_dispatch/system_testing/driver.rb b/actionpack/lib/action_dispatch/system_testing/driver.rb
index 2b4addde08..1a027f2e23 100644
--- a/actionpack/lib/action_dispatch/system_testing/driver.rb
+++ b/actionpack/lib/action_dispatch/system_testing/driver.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     class Driver # :nodoc:
diff --git a/actionpack/lib/action_dispatch/system_testing/server.rb b/actionpack/lib/action_dispatch/system_testing/server.rb
index b98a1deee9..89ca6944d9 100644
--- a/actionpack/lib/action_dispatch/system_testing/server.rb
+++ b/actionpack/lib/action_dispatch/system_testing/server.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/handler/puma"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
index 40150c1fe5..859d68e475 100644
--- a/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
+++ b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     module TestHelpers
diff --git a/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb b/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
index 7c45e165bc..f03f0d4299 100644
--- a/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
+++ b/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     module TestHelpers
diff --git a/actionpack/lib/action_dispatch/testing/assertion_response.rb b/actionpack/lib/action_dispatch/testing/assertion_response.rb
index 869b98b480..c37726957e 100644
--- a/actionpack/lib/action_dispatch/testing/assertion_response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertion_response.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   # This is a class that abstracts away an asserted response. It purposely
   # does not inherit from Response because it doesn't need it. That means it
diff --git a/actionpack/lib/action_dispatch/testing/assertions.rb b/actionpack/lib/action_dispatch/testing/assertions.rb
index c6eaae0a95..4ea18d671d 100644
--- a/actionpack/lib/action_dispatch/testing/assertions.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails-dom-testing"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/testing/assertions/response.rb b/actionpack/lib/action_dispatch/testing/assertions/response.rb
index 918174c241..749f2eab57 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/response.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   module Assertions
     # A small suite of assertions that test responses from \Rails applications.
diff --git a/actionpack/lib/action_dispatch/testing/assertions/routing.rb b/actionpack/lib/action_dispatch/testing/assertions/routing.rb
index cde83dc537..8645df4370 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/routing.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/routing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "uri"
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/string/access"
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index d38a364801..f16647fac8 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "stringio"
 require "uri"
 require "active_support/core_ext/kernel/singleton_class"
diff --git a/actionpack/lib/action_dispatch/testing/request_encoder.rb b/actionpack/lib/action_dispatch/testing/request_encoder.rb
index a614a9d5bc..8c27e9ecb7 100644
--- a/actionpack/lib/action_dispatch/testing/request_encoder.rb
+++ b/actionpack/lib/action_dispatch/testing/request_encoder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionDispatch
   class RequestEncoder # :nodoc:
     class IdentityEncoder
diff --git a/actionpack/lib/action_dispatch/testing/test_process.rb b/actionpack/lib/action_dispatch/testing/test_process.rb
index ea0e6dcb1a..0282eb15c3 100644
--- a/actionpack/lib/action_dispatch/testing/test_process.rb
+++ b/actionpack/lib/action_dispatch/testing/test_process.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/middleware/cookies"
 require "action_dispatch/middleware/flash"
 
diff --git a/actionpack/lib/action_dispatch/testing/test_request.rb b/actionpack/lib/action_dispatch/testing/test_request.rb
index 0b2e8a6232..ec949c869b 100644
--- a/actionpack/lib/action_dispatch/testing/test_request.rb
+++ b/actionpack/lib/action_dispatch/testing/test_request.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 require "rack/utils"
 
diff --git a/actionpack/lib/action_dispatch/testing/test_response.rb b/actionpack/lib/action_dispatch/testing/test_response.rb
index c63e4b5b09..5c89f9c75e 100644
--- a/actionpack/lib/action_dispatch/testing/test_response.rb
+++ b/actionpack/lib/action_dispatch/testing/test_response.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/testing/request_encoder"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_pack.rb b/actionpack/lib/action_pack.rb
index ada60031b0..eec622e085 100644
--- a/actionpack/lib/action_pack.rb
+++ b/actionpack/lib/action_pack.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionpack/lib/action_pack/gem_version.rb b/actionpack/lib/action_pack/gem_version.rb
index 88c4bcd2d9..fddc3033d5 100644
--- a/actionpack/lib/action_pack/gem_version.rb
+++ b/actionpack/lib/action_pack/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionPack
   # Returns the version of the currently loaded Action Pack as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/actionpack/lib/action_pack/version.rb b/actionpack/lib/action_pack/version.rb
index 9b0c5026ac..3d96158431 100644
--- a/actionpack/lib/action_pack/version.rb
+++ b/actionpack/lib/action_pack/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionPack
diff --git a/actionpack/test/abstract/callbacks_test.rb b/actionpack/test/abstract/callbacks_test.rb
index 6e1490cabf..9c2261bf76 100644
--- a/actionpack/test/abstract/callbacks_test.rb
+++ b/actionpack/test/abstract/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract/collector_test.rb b/actionpack/test/abstract/collector_test.rb
index c701001a4d..1cd3526483 100644
--- a/actionpack/test/abstract/collector_test.rb
+++ b/actionpack/test/abstract/collector_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract/translation_test.rb b/actionpack/test/abstract/translation_test.rb
index 42f330bc9d..4893144905 100644
--- a/actionpack/test/abstract/translation_test.rb
+++ b/actionpack/test/abstract/translation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index e54c62b96b..bd118b46be 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $:.unshift File.expand_path("lib", __dir__)
 $:.unshift File.expand_path("fixtures/helpers", __dir__)
 $:.unshift File.expand_path("fixtures/alternate_helpers", __dir__)
diff --git a/actionpack/test/assertions/response_assertions_test.rb b/actionpack/test/assertions/response_assertions_test.rb
index 2a0fd92c79..14a04ccdb1 100644
--- a/actionpack/test/assertions/response_assertions_test.rb
+++ b/actionpack/test/assertions/response_assertions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/testing/assertions/response"
 
diff --git a/actionpack/test/controller/action_pack_assertions_test.rb b/actionpack/test/controller/action_pack_assertions_test.rb
index baacd58207..73aab5848b 100644
--- a/actionpack/test/controller/action_pack_assertions_test.rb
+++ b/actionpack/test/controller/action_pack_assertions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/controller/api/conditional_get_test.rb b/actionpack/test/controller/api/conditional_get_test.rb
index fa9aea0cd3..7b70829101 100644
--- a/actionpack/test/controller/api/conditional_get_test.rb
+++ b/actionpack/test/controller/api/conditional_get_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/integer/time"
 require "active_support/core_ext/numeric/time"
diff --git a/actionpack/test/controller/api/data_streaming_test.rb b/actionpack/test/controller/api/data_streaming_test.rb
index cedec53f81..e6419b9adf 100644
--- a/actionpack/test/controller/api/data_streaming_test.rb
+++ b/actionpack/test/controller/api/data_streaming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module TestApiFileUtils
diff --git a/actionpack/test/controller/api/force_ssl_test.rb b/actionpack/test/controller/api/force_ssl_test.rb
index 2343d1340d..d239964e4a 100644
--- a/actionpack/test/controller/api/force_ssl_test.rb
+++ b/actionpack/test/controller/api/force_ssl_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ForceSSLApiController < ActionController::API
diff --git a/actionpack/test/controller/api/implicit_render_test.rb b/actionpack/test/controller/api/implicit_render_test.rb
index 658ec8c4f9..b51ee0cf42 100644
--- a/actionpack/test/controller/api/implicit_render_test.rb
+++ b/actionpack/test/controller/api/implicit_render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ImplicitRenderAPITestController < ActionController::API
diff --git a/actionpack/test/controller/api/params_wrapper_test.rb b/actionpack/test/controller/api/params_wrapper_test.rb
index 62fd2d8c8a..a1da852040 100644
--- a/actionpack/test/controller/api/params_wrapper_test.rb
+++ b/actionpack/test/controller/api/params_wrapper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ParamsWrapperForApiTest < ActionController::TestCase
diff --git a/actionpack/test/controller/api/redirect_to_test.rb b/actionpack/test/controller/api/redirect_to_test.rb
index 442cfcca6e..ab14409f40 100644
--- a/actionpack/test/controller/api/redirect_to_test.rb
+++ b/actionpack/test/controller/api/redirect_to_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RedirectToApiController < ActionController::API
diff --git a/actionpack/test/controller/api/renderers_test.rb b/actionpack/test/controller/api/renderers_test.rb
index fa0f75bcdf..04e34a1f8f 100644
--- a/actionpack/test/controller/api/renderers_test.rb
+++ b/actionpack/test/controller/api/renderers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/conversions"
 
diff --git a/actionpack/test/controller/api/url_for_test.rb b/actionpack/test/controller/api/url_for_test.rb
index 958067f843..cb4ae7a88a 100644
--- a/actionpack/test/controller/api/url_for_test.rb
+++ b/actionpack/test/controller/api/url_for_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class UrlForApiController < ActionController::API
diff --git a/actionpack/test/controller/api/with_cookies_test.rb b/actionpack/test/controller/api/with_cookies_test.rb
index 3dd63a5285..8928237dfd 100644
--- a/actionpack/test/controller/api/with_cookies_test.rb
+++ b/actionpack/test/controller/api/with_cookies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class WithCookiesController < ActionController::API
diff --git a/actionpack/test/controller/api/with_helpers_test.rb b/actionpack/test/controller/api/with_helpers_test.rb
index b9d8f6515f..06db949153 100644
--- a/actionpack/test/controller/api/with_helpers_test.rb
+++ b/actionpack/test/controller/api/with_helpers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ApiWithHelper
diff --git a/actionpack/test/controller/base_test.rb b/actionpack/test/controller/base_test.rb
index 46828a0f9e..4e969fac07 100644
--- a/actionpack/test/controller/base_test.rb
+++ b/actionpack/test/controller/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/logger"
 require "controller/fake_models"
diff --git a/actionpack/test/controller/caching_test.rb b/actionpack/test/controller/caching_test.rb
index aae7d0272f..c86dcafee5 100644
--- a/actionpack/test/controller/caching_test.rb
+++ b/actionpack/test/controller/caching_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "abstract_unit"
 require "lib/controller/fake_models"
diff --git a/actionpack/test/controller/content_type_test.rb b/actionpack/test/controller/content_type_test.rb
index 37b29eedf2..fcb2632b80 100644
--- a/actionpack/test/controller/content_type_test.rb
+++ b/actionpack/test/controller/content_type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class OldContentTypeController < ActionController::Base
diff --git a/actionpack/test/controller/default_url_options_with_before_action_test.rb b/actionpack/test/controller/default_url_options_with_before_action_test.rb
index 78eb72f5d0..e3fe7a6495 100644
--- a/actionpack/test/controller/default_url_options_with_before_action_test.rb
+++ b/actionpack/test/controller/default_url_options_with_before_action_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ControllerWithBeforeActionAndDefaultUrlOptions < ActionController::Base
diff --git a/actionpack/test/controller/filters_test.rb b/actionpack/test/controller/filters_test.rb
index 93706ca888..5f1463cfa8 100644
--- a/actionpack/test/controller/filters_test.rb
+++ b/actionpack/test/controller/filters_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ActionController::Base
diff --git a/actionpack/test/controller/flash_hash_test.rb b/actionpack/test/controller/flash_hash_test.rb
index d571f79b69..45b598a594 100644
--- a/actionpack/test/controller/flash_hash_test.rb
+++ b/actionpack/test/controller/flash_hash_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/controller/flash_test.rb b/actionpack/test/controller/flash_test.rb
index e2025e9ac2..dc641c19ab 100644
--- a/actionpack/test/controller/flash_test.rb
+++ b/actionpack/test/controller/flash_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/key_generator"
 
diff --git a/actionpack/test/controller/force_ssl_test.rb b/actionpack/test/controller/force_ssl_test.rb
index 0bfbed7b2c..2b3859aa57 100644
--- a/actionpack/test/controller/force_ssl_test.rb
+++ b/actionpack/test/controller/force_ssl_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ForceSSLController < ActionController::Base
diff --git a/actionpack/test/controller/form_builder_test.rb b/actionpack/test/controller/form_builder_test.rb
index 06c655f444..5a3dc2ee03 100644
--- a/actionpack/test/controller/form_builder_test.rb
+++ b/actionpack/test/controller/form_builder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class FormBuilderController < ActionController::Base
diff --git a/actionpack/test/controller/helper_test.rb b/actionpack/test/controller/helper_test.rb
index f7fd8c3f8b..03dbd63614 100644
--- a/actionpack/test/controller/helper_test.rb
+++ b/actionpack/test/controller/helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 ActionController::Base.helpers_path = File.expand_path("../fixtures/helpers", __dir__)
diff --git a/actionpack/test/controller/http_basic_authentication_test.rb b/actionpack/test/controller/http_basic_authentication_test.rb
index 5b14855d59..d9ae787689 100644
--- a/actionpack/test/controller/http_basic_authentication_test.rb
+++ b/actionpack/test/controller/http_basic_authentication_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class HttpBasicAuthenticationTest < ActionController::TestCase
diff --git a/actionpack/test/controller/http_digest_authentication_test.rb b/actionpack/test/controller/http_digest_authentication_test.rb
index f3a216075e..0b59e123d7 100644
--- a/actionpack/test/controller/http_digest_authentication_test.rb
+++ b/actionpack/test/controller/http_digest_authentication_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/key_generator"
 
diff --git a/actionpack/test/controller/http_token_authentication_test.rb b/actionpack/test/controller/http_token_authentication_test.rb
index bcb47de98a..09d2793c9a 100644
--- a/actionpack/test/controller/http_token_authentication_test.rb
+++ b/actionpack/test/controller/http_token_authentication_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class HttpTokenAuthenticationTest < ActionController::TestCase
diff --git a/actionpack/test/controller/integration_test.rb b/actionpack/test/controller/integration_test.rb
index a610844fb1..cb282d4330 100644
--- a/actionpack/test/controller/integration_test.rb
+++ b/actionpack/test/controller/integration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "rails/engine"
diff --git a/actionpack/test/controller/live_stream_test.rb b/actionpack/test/controller/live_stream_test.rb
index 01ae9c75de..bfb47b90d5 100644
--- a/actionpack/test/controller/live_stream_test.rb
+++ b/actionpack/test/controller/live_stream_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "timeout"
 require "concurrent/atomic/count_down_latch"
diff --git a/actionpack/test/controller/localized_templates_test.rb b/actionpack/test/controller/localized_templates_test.rb
index bbb5b356d9..0f2242b693 100644
--- a/actionpack/test/controller/localized_templates_test.rb
+++ b/actionpack/test/controller/localized_templates_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class LocalizedController < ActionController::Base
diff --git a/actionpack/test/controller/log_subscriber_test.rb b/actionpack/test/controller/log_subscriber_test.rb
index b17e351e0f..45a120acb6 100644
--- a/actionpack/test/controller/log_subscriber_test.rb
+++ b/actionpack/test/controller/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 require "action_controller/log_subscriber"
diff --git a/actionpack/test/controller/metal/renderers_test.rb b/actionpack/test/controller/metal/renderers_test.rb
index f713024056..7dc3dd6a6d 100644
--- a/actionpack/test/controller/metal/renderers_test.rb
+++ b/actionpack/test/controller/metal/renderers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/conversions"
 
diff --git a/actionpack/test/controller/metal_test.rb b/actionpack/test/controller/metal_test.rb
index 67925359db..e16452ed6f 100644
--- a/actionpack/test/controller/metal_test.rb
+++ b/actionpack/test/controller/metal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MetalControllerInstanceTests < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/mime/accept_format_test.rb b/actionpack/test/controller/mime/accept_format_test.rb
index 01325ba944..d1c4dbfef7 100644
--- a/actionpack/test/controller/mime/accept_format_test.rb
+++ b/actionpack/test/controller/mime/accept_format_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class StarStarMimeController < ActionController::Base
diff --git a/actionpack/test/controller/mime/respond_to_test.rb b/actionpack/test/controller/mime/respond_to_test.rb
index 63be0c7ce9..61bd5c80c4 100644
--- a/actionpack/test/controller/mime/respond_to_test.rb
+++ b/actionpack/test/controller/mime/respond_to_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 
diff --git a/actionpack/test/controller/new_base/bare_metal_test.rb b/actionpack/test/controller/new_base/bare_metal_test.rb
index 7049464969..054757fab3 100644
--- a/actionpack/test/controller/new_base/bare_metal_test.rb
+++ b/actionpack/test/controller/new_base/bare_metal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module BareMetalTest
diff --git a/actionpack/test/controller/new_base/base_test.rb b/actionpack/test/controller/new_base/base_test.rb
index decb154812..b891df4c0f 100644
--- a/actionpack/test/controller/new_base/base_test.rb
+++ b/actionpack/test/controller/new_base/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 # Tests the controller dispatching happy path
diff --git a/actionpack/test/controller/new_base/content_negotiation_test.rb b/actionpack/test/controller/new_base/content_negotiation_test.rb
index a61a573c21..b870745031 100644
--- a/actionpack/test/controller/new_base/content_negotiation_test.rb
+++ b/actionpack/test/controller/new_base/content_negotiation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ContentNegotiation
diff --git a/actionpack/test/controller/new_base/content_type_test.rb b/actionpack/test/controller/new_base/content_type_test.rb
index 1c2cbc8493..85089bafe2 100644
--- a/actionpack/test/controller/new_base/content_type_test.rb
+++ b/actionpack/test/controller/new_base/content_type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ContentType
diff --git a/actionpack/test/controller/new_base/middleware_test.rb b/actionpack/test/controller/new_base/middleware_test.rb
index 7340a57389..0493291c03 100644
--- a/actionpack/test/controller/new_base/middleware_test.rb
+++ b/actionpack/test/controller/new_base/middleware_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module MiddlewareTest
diff --git a/actionpack/test/controller/new_base/render_action_test.rb b/actionpack/test/controller/new_base/render_action_test.rb
index bd55be2adc..4b59a3d676 100644
--- a/actionpack/test/controller/new_base/render_action_test.rb
+++ b/actionpack/test/controller/new_base/render_action_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderAction
diff --git a/actionpack/test/controller/new_base/render_body_test.rb b/actionpack/test/controller/new_base/render_body_test.rb
index 647ae16329..b1467a0deb 100644
--- a/actionpack/test/controller/new_base/render_body_test.rb
+++ b/actionpack/test/controller/new_base/render_body_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderBody
diff --git a/actionpack/test/controller/new_base/render_context_test.rb b/actionpack/test/controller/new_base/render_context_test.rb
index 87b778b21b..25b73ac78c 100644
--- a/actionpack/test/controller/new_base/render_context_test.rb
+++ b/actionpack/test/controller/new_base/render_context_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 # This is testing the decoupling of view renderer and view context
diff --git a/actionpack/test/controller/new_base/render_file_test.rb b/actionpack/test/controller/new_base/render_file_test.rb
index db7b1b94ee..4491dd96ed 100644
--- a/actionpack/test/controller/new_base/render_file_test.rb
+++ b/actionpack/test/controller/new_base/render_file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderFile
diff --git a/actionpack/test/controller/new_base/render_html_test.rb b/actionpack/test/controller/new_base/render_html_test.rb
index 8041e22a11..8019aa1eb5 100644
--- a/actionpack/test/controller/new_base/render_html_test.rb
+++ b/actionpack/test/controller/new_base/render_html_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderHtml
diff --git a/actionpack/test/controller/new_base/render_implicit_action_test.rb b/actionpack/test/controller/new_base/render_implicit_action_test.rb
index 9e2b02914d..c5fc8e15e1 100644
--- a/actionpack/test/controller/new_base/render_implicit_action_test.rb
+++ b/actionpack/test/controller/new_base/render_implicit_action_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderImplicitAction
diff --git a/actionpack/test/controller/new_base/render_layout_test.rb b/actionpack/test/controller/new_base/render_layout_test.rb
index c49e1890c3..0a3809560e 100644
--- a/actionpack/test/controller/new_base/render_layout_test.rb
+++ b/actionpack/test/controller/new_base/render_layout_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ControllerLayouts
diff --git a/actionpack/test/controller/new_base/render_partial_test.rb b/actionpack/test/controller/new_base/render_partial_test.rb
index 70a4f5a9d5..4511826978 100644
--- a/actionpack/test/controller/new_base/render_partial_test.rb
+++ b/actionpack/test/controller/new_base/render_partial_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderPartial
diff --git a/actionpack/test/controller/new_base/render_plain_test.rb b/actionpack/test/controller/new_base/render_plain_test.rb
index 236d9d0fd1..44be8dd380 100644
--- a/actionpack/test/controller/new_base/render_plain_test.rb
+++ b/actionpack/test/controller/new_base/render_plain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderPlain
diff --git a/actionpack/test/controller/new_base/render_streaming_test.rb b/actionpack/test/controller/new_base/render_streaming_test.rb
index 555e961aba..1177b8b03e 100644
--- a/actionpack/test/controller/new_base/render_streaming_test.rb
+++ b/actionpack/test/controller/new_base/render_streaming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderStreaming
diff --git a/actionpack/test/controller/new_base/render_template_test.rb b/actionpack/test/controller/new_base/render_template_test.rb
index 0ea1b6eeb7..1102305f3e 100644
--- a/actionpack/test/controller/new_base/render_template_test.rb
+++ b/actionpack/test/controller/new_base/render_template_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderTemplate
diff --git a/actionpack/test/controller/new_base/render_test.rb b/actionpack/test/controller/new_base/render_test.rb
index ee81760450..cea3f9b5fd 100644
--- a/actionpack/test/controller/new_base/render_test.rb
+++ b/actionpack/test/controller/new_base/render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module Render
diff --git a/actionpack/test/controller/new_base/render_xml_test.rb b/actionpack/test/controller/new_base/render_xml_test.rb
index bf3563080d..8bab413377 100644
--- a/actionpack/test/controller/new_base/render_xml_test.rb
+++ b/actionpack/test/controller/new_base/render_xml_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderXml
diff --git a/actionpack/test/controller/output_escaping_test.rb b/actionpack/test/controller/output_escaping_test.rb
index cf5eda7fc2..c7047d95ae 100644
--- a/actionpack/test/controller/output_escaping_test.rb
+++ b/actionpack/test/controller/output_escaping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class OutputEscapingTest < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/parameter_encoding_test.rb b/actionpack/test/controller/parameter_encoding_test.rb
index 371188c230..234d0bddd1 100644
--- a/actionpack/test/controller/parameter_encoding_test.rb
+++ b/actionpack/test/controller/parameter_encoding_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ParameterEncodingController < ActionController::Base
diff --git a/actionpack/test/controller/parameters/accessors_test.rb b/actionpack/test/controller/parameters/accessors_test.rb
index e9c9d175ec..87407a4272 100644
--- a/actionpack/test/controller/parameters/accessors_test.rb
+++ b/actionpack/test/controller/parameters/accessors_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/hash/transform_values"
diff --git a/actionpack/test/controller/parameters/always_permitted_parameters_test.rb b/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
index 55c9d7b96a..cd7c98f112 100644
--- a/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
+++ b/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/dup_test.rb b/actionpack/test/controller/parameters/dup_test.rb
index 4a163df390..fb707a1354 100644
--- a/actionpack/test/controller/parameters/dup_test.rb
+++ b/actionpack/test/controller/parameters/dup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/object/deep_dup"
diff --git a/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb b/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
index 52b588ee4f..c800c1d3df 100644
--- a/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
+++ b/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb b/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
index ef39fc3b71..88fb477c10 100644
--- a/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
+++ b/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/mutators_test.rb b/actionpack/test/controller/parameters/mutators_test.rb
index 98dc621691..3fe7340782 100644
--- a/actionpack/test/controller/parameters/mutators_test.rb
+++ b/actionpack/test/controller/parameters/mutators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/hash/transform_values"
diff --git a/actionpack/test/controller/parameters/nested_parameters_permit_test.rb b/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
index 46ac102802..00e591d5a7 100644
--- a/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 5b13b65f61..ae2b45c9f0 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/http/upload"
 require "action_controller/metal/strong_parameters"
diff --git a/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb b/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
index b5e0406b9c..8fab7b28e9 100644
--- a/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
+++ b/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/serialization_test.rb b/actionpack/test/controller/parameters/serialization_test.rb
index 11e264a23a..6fba2fde91 100644
--- a/actionpack/test/controller/parameters/serialization_test.rb
+++ b/actionpack/test/controller/parameters/serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/string/strip"
diff --git a/actionpack/test/controller/params_wrapper_test.rb b/actionpack/test/controller/params_wrapper_test.rb
index 7eab456767..4cbb28ef60 100644
--- a/actionpack/test/controller/params_wrapper_test.rb
+++ b/actionpack/test/controller/params_wrapper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module Admin; class User; end; end
diff --git a/actionpack/test/controller/permitted_params_test.rb b/actionpack/test/controller/permitted_params_test.rb
index 37b53360a4..6205a09816 100644
--- a/actionpack/test/controller/permitted_params_test.rb
+++ b/actionpack/test/controller/permitted_params_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class PeopleController < ActionController::Base
diff --git a/actionpack/test/controller/redirect_test.rb b/actionpack/test/controller/redirect_test.rb
index ecec3b63c4..5b16af78c4 100644
--- a/actionpack/test/controller/redirect_test.rb
+++ b/actionpack/test/controller/redirect_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class Workshop
diff --git a/actionpack/test/controller/render_js_test.rb b/actionpack/test/controller/render_js_test.rb
index 29b8651046..290218d4a2 100644
--- a/actionpack/test/controller/render_js_test.rb
+++ b/actionpack/test/controller/render_js_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "pathname"
diff --git a/actionpack/test/controller/render_json_test.rb b/actionpack/test/controller/render_json_test.rb
index 2173d89276..79552ec8f1 100644
--- a/actionpack/test/controller/render_json_test.rb
+++ b/actionpack/test/controller/render_json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "active_support/logger"
diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb
index a9ef36690c..17d834d55f 100644
--- a/actionpack/test/controller/render_test.rb
+++ b/actionpack/test/controller/render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionpack/test/controller/render_xml_test.rb b/actionpack/test/controller/render_xml_test.rb
index 0bd73fe880..24866d7d6a 100644
--- a/actionpack/test/controller/render_xml_test.rb
+++ b/actionpack/test/controller/render_xml_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "pathname"
diff --git a/actionpack/test/controller/renderer_test.rb b/actionpack/test/controller/renderer_test.rb
index 817dbc2f34..052c974d68 100644
--- a/actionpack/test/controller/renderer_test.rb
+++ b/actionpack/test/controller/renderer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RendererTest < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/renderers_test.rb b/actionpack/test/controller/renderers_test.rb
index 63f36adeeb..ccc700d79c 100644
--- a/actionpack/test/controller/renderers_test.rb
+++ b/actionpack/test/controller/renderers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "active_support/logger"
diff --git a/actionpack/test/controller/request/test_request_test.rb b/actionpack/test/controller/request/test_request_test.rb
index a051e0f86c..1440db00f6 100644
--- a/actionpack/test/controller/request/test_request_test.rb
+++ b/actionpack/test/controller/request/test_request_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 
diff --git a/actionpack/test/controller/request_forgery_protection_test.rb b/actionpack/test/controller/request_forgery_protection_test.rb
index 0fb103b444..521d93f02e 100644
--- a/actionpack/test/controller/request_forgery_protection_test.rb
+++ b/actionpack/test/controller/request_forgery_protection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 
diff --git a/actionpack/test/controller/required_params_test.rb b/actionpack/test/controller/required_params_test.rb
index 9d9a9d49b5..46bb374b3f 100644
--- a/actionpack/test/controller/required_params_test.rb
+++ b/actionpack/test/controller/required_params_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class BooksController < ActionController::Base
diff --git a/actionpack/test/controller/rescue_test.rb b/actionpack/test/controller/rescue_test.rb
index 45c04f566d..9ae22c4554 100644
--- a/actionpack/test/controller/rescue_test.rb
+++ b/actionpack/test/controller/rescue_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RescueController < ActionController::Base
diff --git a/actionpack/test/controller/resources_test.rb b/actionpack/test/controller/resources_test.rb
index a3833a593d..fad34dacce 100644
--- a/actionpack/test/controller/resources_test.rb
+++ b/actionpack/test/controller/resources_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/try"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/routing_test.rb b/actionpack/test/controller/routing_test.rb
index 2f82b000d7..56b39510bb 100644
--- a/actionpack/test/controller/routing_test.rb
+++ b/actionpack/test/controller/routing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/runner_test.rb b/actionpack/test/controller/runner_test.rb
index 558995b48b..3c0c1907f9 100644
--- a/actionpack/test/controller/runner_test.rb
+++ b/actionpack/test/controller/runner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/testing/integration"
 
diff --git a/actionpack/test/controller/send_file_test.rb b/actionpack/test/controller/send_file_test.rb
index 20ed938e56..e265c6c49c 100644
--- a/actionpack/test/controller/send_file_test.rb
+++ b/actionpack/test/controller/send_file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module TestFileUtils
diff --git a/actionpack/test/controller/show_exceptions_test.rb b/actionpack/test/controller/show_exceptions_test.rb
index 13a5001f39..38c601ee81 100644
--- a/actionpack/test/controller/show_exceptions_test.rb
+++ b/actionpack/test/controller/show_exceptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ShowExceptions
diff --git a/actionpack/test/controller/streaming_test.rb b/actionpack/test/controller/streaming_test.rb
index c03a09dc1f..d685467cad 100644
--- a/actionpack/test/controller/streaming_test.rb
+++ b/actionpack/test/controller/streaming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionController
diff --git a/actionpack/test/controller/test_case_test.rb b/actionpack/test/controller/test_case_test.rb
index fe10d8f381..677e2ddded 100644
--- a/actionpack/test/controller/test_case_test.rb
+++ b/actionpack/test/controller/test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/json/decoding"
diff --git a/actionpack/test/controller/url_for_integration_test.rb b/actionpack/test/controller/url_for_integration_test.rb
index e910f95e24..f640e77b99 100644
--- a/actionpack/test/controller/url_for_integration_test.rb
+++ b/actionpack/test/controller/url_for_integration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/url_for_test.rb b/actionpack/test/controller/url_for_test.rb
index bd618adb3e..2afe67ed91 100644
--- a/actionpack/test/controller/url_for_test.rb
+++ b/actionpack/test/controller/url_for_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/controller/url_rewriter_test.rb b/actionpack/test/controller/url_rewriter_test.rb
index ca1be68927..a055e6d177 100644
--- a/actionpack/test/controller/url_rewriter_test.rb
+++ b/actionpack/test/controller/url_rewriter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/controller/webservice_test.rb b/actionpack/test/controller/webservice_test.rb
index 3ec6e5eda5..6f97a4b62e 100644
--- a/actionpack/test/controller/webservice_test.rb
+++ b/actionpack/test/controller/webservice_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json/decoding"
 
diff --git a/actionpack/test/dispatch/callbacks_test.rb b/actionpack/test/dispatch/callbacks_test.rb
index 0edeb93cd5..29a5dfc0ad 100644
--- a/actionpack/test/dispatch/callbacks_test.rb
+++ b/actionpack/test/dispatch/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class DispatcherTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/cookies_test.rb b/actionpack/test/dispatch/cookies_test.rb
index 6e37d2ad07..e5646de82e 100644
--- a/actionpack/test/dispatch/cookies_test.rb
+++ b/actionpack/test/dispatch/cookies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "openssl"
 require "active_support/key_generator"
diff --git a/actionpack/test/dispatch/debug_exceptions_test.rb b/actionpack/test/dispatch/debug_exceptions_test.rb
index dc98681c6e..ea477e8908 100644
--- a/actionpack/test/dispatch/debug_exceptions_test.rb
+++ b/actionpack/test/dispatch/debug_exceptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class DebugExceptionsTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/exception_wrapper_test.rb b/actionpack/test/dispatch/exception_wrapper_test.rb
index 54079b3b38..316661a116 100644
--- a/actionpack/test/dispatch/exception_wrapper_test.rb
+++ b/actionpack/test/dispatch/exception_wrapper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/executor_test.rb b/actionpack/test/dispatch/executor_test.rb
index 1250723cb5..0b4e0849c3 100644
--- a/actionpack/test/dispatch/executor_test.rb
+++ b/actionpack/test/dispatch/executor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ExecutorTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/header_test.rb b/actionpack/test/dispatch/header_test.rb
index 11b7dee8c9..958450072e 100644
--- a/actionpack/test/dispatch/header_test.rb
+++ b/actionpack/test/dispatch/header_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class HeaderTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/live_response_test.rb b/actionpack/test/dispatch/live_response_test.rb
index 21d9cccbf7..d10fc7d575 100644
--- a/actionpack/test/dispatch/live_response_test.rb
+++ b/actionpack/test/dispatch/live_response_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "concurrent/atomic/count_down_latch"
 
diff --git a/actionpack/test/dispatch/mapper_test.rb b/actionpack/test/dispatch/mapper_test.rb
index 3fad24ee7f..1596d23b1e 100644
--- a/actionpack/test/dispatch/mapper_test.rb
+++ b/actionpack/test/dispatch/mapper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/middleware_stack_test.rb b/actionpack/test/dispatch/middleware_stack_test.rb
index adb17e83d4..481aa22b10 100644
--- a/actionpack/test/dispatch/middleware_stack_test.rb
+++ b/actionpack/test/dispatch/middleware_stack_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MiddlewareStackTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/mime_type_test.rb b/actionpack/test/dispatch/mime_type_test.rb
index 6c254fb690..2ca03c535a 100644
--- a/actionpack/test/dispatch/mime_type_test.rb
+++ b/actionpack/test/dispatch/mime_type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MimeTypeTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/mount_test.rb b/actionpack/test/dispatch/mount_test.rb
index c64c782136..a7d5ba2345 100644
--- a/actionpack/test/dispatch/mount_test.rb
+++ b/actionpack/test/dispatch/mount_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/engine"
 
diff --git a/actionpack/test/dispatch/prefix_generation_test.rb b/actionpack/test/dispatch/prefix_generation_test.rb
index a40f92dc58..0e093d2188 100644
--- a/actionpack/test/dispatch/prefix_generation_test.rb
+++ b/actionpack/test/dispatch/prefix_generation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rack/test"
 require "rails/engine"
diff --git a/actionpack/test/dispatch/rack_cache_test.rb b/actionpack/test/dispatch/rack_cache_test.rb
index 4f23711a21..d7bb90abbf 100644
--- a/actionpack/test/dispatch/rack_cache_test.rb
+++ b/actionpack/test/dispatch/rack_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/http/rack_cache"
 
diff --git a/actionpack/test/dispatch/reloader_test.rb b/actionpack/test/dispatch/reloader_test.rb
index 1d89abc038..9eb78fe059 100644
--- a/actionpack/test/dispatch/reloader_test.rb
+++ b/actionpack/test/dispatch/reloader_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ReloaderTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/request/json_params_parsing_test.rb b/actionpack/test/dispatch/request/json_params_parsing_test.rb
index 8dec548fc4..10234a4815 100644
--- a/actionpack/test/dispatch/request/json_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/json_params_parsing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class JsonParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/multipart_params_parsing_test.rb b/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
index bfdc675e2c..e7e8c82974 100644
--- a/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MultipartParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/query_string_parsing_test.rb b/actionpack/test/dispatch/request/query_string_parsing_test.rb
index eda8a493c4..2499c33cef 100644
--- a/actionpack/test/dispatch/request/query_string_parsing_test.rb
+++ b/actionpack/test/dispatch/request/query_string_parsing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class QueryStringParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/session_test.rb b/actionpack/test/dispatch/request/session_test.rb
index 6e6b58b633..228135c547 100644
--- a/actionpack/test/dispatch/request/session_test.rb
+++ b/actionpack/test/dispatch/request/session_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/middleware/session/abstract_store"
 
diff --git a/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb b/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
index 80362066da..6721a388c1 100644
--- a/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class UrlEncodedParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request_id_test.rb b/actionpack/test/dispatch/request_id_test.rb
index d2b5505054..4fcd45acf5 100644
--- a/actionpack/test/dispatch/request_id_test.rb
+++ b/actionpack/test/dispatch/request_id_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RequestIdTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/request_test.rb b/actionpack/test/dispatch/request_test.rb
index a2305a0fa2..899b27b962 100644
--- a/actionpack/test/dispatch/request_test.rb
+++ b/actionpack/test/dispatch/request_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class BaseRequestTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/response_test.rb b/actionpack/test/dispatch/response_test.rb
index ca3dfba6ec..7433c5ce0c 100644
--- a/actionpack/test/dispatch/response_test.rb
+++ b/actionpack/test/dispatch/response_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "timeout"
 require "rack/content_length"
diff --git a/actionpack/test/dispatch/routing/concerns_test.rb b/actionpack/test/dispatch/routing/concerns_test.rb
index bf6dfda3b8..2d71c37562 100644
--- a/actionpack/test/dispatch/routing/concerns_test.rb
+++ b/actionpack/test/dispatch/routing/concerns_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ReviewsController < ResourcesController; end
diff --git a/actionpack/test/dispatch/routing/custom_url_helpers_test.rb b/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
index 340b07a929..cbbed66056 100644
--- a/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
+++ b/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestCustomUrlHelpers < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/routing/inspector_test.rb b/actionpack/test/dispatch/routing/inspector_test.rb
index 1d04569d6d..a4babf8554 100644
--- a/actionpack/test/dispatch/routing/inspector_test.rb
+++ b/actionpack/test/dispatch/routing/inspector_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/engine"
 require "action_dispatch/routing/inspector"
diff --git a/actionpack/test/dispatch/routing/ipv6_redirect_test.rb b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
index 6e4fb6842b..179aee9ba7 100644
--- a/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
+++ b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class IPv6IntegrationTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/routing/route_set_test.rb b/actionpack/test/dispatch/routing/route_set_test.rb
index d78b9f85f7..d6ecbda092 100644
--- a/actionpack/test/dispatch/routing/route_set_test.rb
+++ b/actionpack/test/dispatch/routing/route_set_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/routing_assertions_test.rb b/actionpack/test/dispatch/routing_assertions_test.rb
index a1c3cffdef..917ce7e668 100644
--- a/actionpack/test/dispatch/routing_assertions_test.rb
+++ b/actionpack/test/dispatch/routing_assertions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index 967e5c78ff..32cd78e492 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "erb"
 require "abstract_unit"
 require "controller/fake_controllers"
diff --git a/actionpack/test/dispatch/runner_test.rb b/actionpack/test/dispatch/runner_test.rb
index 1adf8e6d11..b76bf4a320 100644
--- a/actionpack/test/dispatch/runner_test.rb
+++ b/actionpack/test/dispatch/runner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RunnerTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/session/abstract_store_test.rb b/actionpack/test/dispatch/session/abstract_store_test.rb
index 903ec8cc77..fd4d359cf8 100644
--- a/actionpack/test/dispatch/session/abstract_store_test.rb
+++ b/actionpack/test/dispatch/session/abstract_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/middleware/session/abstract_store"
 
diff --git a/actionpack/test/dispatch/session/cache_store_test.rb b/actionpack/test/dispatch/session/cache_store_test.rb
index 4f483a851d..859059063f 100644
--- a/actionpack/test/dispatch/session/cache_store_test.rb
+++ b/actionpack/test/dispatch/session/cache_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "fixtures/session_autoload_test/session_autoload_test/foo"
 
diff --git a/actionpack/test/dispatch/session/cookie_store_test.rb b/actionpack/test/dispatch/session/cookie_store_test.rb
index 41a55f2ec0..63dfc07c0d 100644
--- a/actionpack/test/dispatch/session/cookie_store_test.rb
+++ b/actionpack/test/dispatch/session/cookie_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 require "active_support/key_generator"
diff --git a/actionpack/test/dispatch/session/mem_cache_store_test.rb b/actionpack/test/dispatch/session/mem_cache_store_test.rb
index f66075add7..121e9ebef7 100644
--- a/actionpack/test/dispatch/session/mem_cache_store_test.rb
+++ b/actionpack/test/dispatch/session/mem_cache_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "securerandom"
 
diff --git a/actionpack/test/dispatch/session/test_session_test.rb b/actionpack/test/dispatch/session/test_session_test.rb
index e355645acc..0bf3a8b3ee 100644
--- a/actionpack/test/dispatch/session/test_session_test.rb
+++ b/actionpack/test/dispatch/session/test_session_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 
diff --git a/actionpack/test/dispatch/show_exceptions_test.rb b/actionpack/test/dispatch/show_exceptions_test.rb
index 9f6e15ec61..3513534d72 100644
--- a/actionpack/test/dispatch/show_exceptions_test.rb
+++ b/actionpack/test/dispatch/show_exceptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ShowExceptionsTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/ssl_test.rb b/actionpack/test/dispatch/ssl_test.rb
index 7b9cf1cba4..757e26973f 100644
--- a/actionpack/test/dispatch/ssl_test.rb
+++ b/actionpack/test/dispatch/ssl_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class SSLTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/static_test.rb b/actionpack/test/dispatch/static_test.rb
index ce95d2b74b..3082d1072b 100644
--- a/actionpack/test/dispatch/static_test.rb
+++ b/actionpack/test/dispatch/static_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "zlib"
 
diff --git a/actionpack/test/dispatch/system_testing/driver_test.rb b/actionpack/test/dispatch/system_testing/driver_test.rb
index 579c92f2ae..4a1b971da5 100644
--- a/actionpack/test/dispatch/system_testing/driver_test.rb
+++ b/actionpack/test/dispatch/system_testing/driver_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/system_testing/driver"
 
diff --git a/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb b/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
index 0f0c7c157a..a83818fd80 100644
--- a/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
+++ b/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/system_testing/test_helpers/screenshot_helper"
 require "capybara/dsl"
diff --git a/actionpack/test/dispatch/system_testing/server_test.rb b/actionpack/test/dispatch/system_testing/server_test.rb
index e1cecce3e1..10412d6367 100644
--- a/actionpack/test/dispatch/system_testing/server_test.rb
+++ b/actionpack/test/dispatch/system_testing/server_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "capybara/dsl"
 require "action_dispatch/system_testing/server"
diff --git a/actionpack/test/dispatch/system_testing/system_test_case_test.rb b/actionpack/test/dispatch/system_testing/system_test_case_test.rb
index b853079476..8f90e45f5f 100644
--- a/actionpack/test/dispatch/system_testing/system_test_case_test.rb
+++ b/actionpack/test/dispatch/system_testing/system_test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class SetDriverToRackTestTest < DrivenByRackTest
diff --git a/actionpack/test/dispatch/test_request_test.rb b/actionpack/test/dispatch/test_request_test.rb
index 1bfafb6169..85a6df4975 100644
--- a/actionpack/test/dispatch/test_request_test.rb
+++ b/actionpack/test/dispatch/test_request_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestRequestTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/test_response_test.rb b/actionpack/test/dispatch/test_response_test.rb
index 4e208f4784..98eafb5119 100644
--- a/actionpack/test/dispatch/test_response_test.rb
+++ b/actionpack/test/dispatch/test_response_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestResponseTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/uploaded_file_test.rb b/actionpack/test/dispatch/uploaded_file_test.rb
index e47e122dfa..0074d2a314 100644
--- a/actionpack/test/dispatch/uploaded_file_test.rb
+++ b/actionpack/test/dispatch/uploaded_file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/url_generation_test.rb b/actionpack/test/dispatch/url_generation_test.rb
index c87c3f628a..5d81fd6834 100644
--- a/actionpack/test/dispatch/url_generation_test.rb
+++ b/actionpack/test/dispatch/url_generation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module TestUrlGeneration
diff --git a/actionpack/test/fixtures/alternate_helpers/foo_helper.rb b/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
index 66e74edd51..2528584473 100644
--- a/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
+++ b/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module FooHelper
   redefine_method(:baz) {}
 end
diff --git a/actionpack/test/fixtures/company.rb b/actionpack/test/fixtures/company.rb
index 18a197947a..9f527acdd8 100644
--- a/actionpack/test/fixtures/company.rb
+++ b/actionpack/test/fixtures/company.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Company < ActiveRecord::Base
   has_one :mascot
   self.sequence_name = :companies_nonstd_seq
diff --git a/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder b/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
index 91b5160fcb..6599579740 100644
--- a/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
+++ b/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.body do
   cache("fragment") do
     xml.p "Builder"
diff --git a/actionpack/test/fixtures/helpers/abc_helper.rb b/actionpack/test/fixtures/helpers/abc_helper.rb
index a743c7ee9a..cf2774bb5f 100644
--- a/actionpack/test/fixtures/helpers/abc_helper.rb
+++ b/actionpack/test/fixtures/helpers/abc_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbcHelper
   def bare_a() end
 end
diff --git a/actionpack/test/fixtures/helpers/fun/games_helper.rb b/actionpack/test/fixtures/helpers/fun/games_helper.rb
index 7781f9087c..2d5e50f5a5 100644
--- a/actionpack/test/fixtures/helpers/fun/games_helper.rb
+++ b/actionpack/test/fixtures/helpers/fun/games_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Fun
   module GamesHelper
     def stratego() "Iz guuut!" end
diff --git a/actionpack/test/fixtures/helpers/fun/pdf_helper.rb b/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
index 70d8f722fb..16057fd466 100644
--- a/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
+++ b/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Fun
   module PdfHelper
     def foobar() "baz" end
diff --git a/actionpack/test/fixtures/helpers/just_me_helper.rb b/actionpack/test/fixtures/helpers/just_me_helper.rb
index eb0cce3b77..9b43fc6d49 100644
--- a/actionpack/test/fixtures/helpers/just_me_helper.rb
+++ b/actionpack/test/fixtures/helpers/just_me_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module JustMeHelper
   def me() "mine!" end
 end
diff --git a/actionpack/test/fixtures/helpers/me_too_helper.rb b/actionpack/test/fixtures/helpers/me_too_helper.rb
index e8eb1ea52a..8e312e7cd0 100644
--- a/actionpack/test/fixtures/helpers/me_too_helper.rb
+++ b/actionpack/test/fixtures/helpers/me_too_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module MeTooHelper
   def me() "me too!" end
 end
diff --git a/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb b/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
index 9ff86420be..9faa427736 100644
--- a/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
+++ b/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Pack1Helper
   def conflicting_helper
     "pack1"
diff --git a/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb b/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
index 8b39ffd971..cf56697dfb 100644
--- a/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
+++ b/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Pack2Helper
   def conflicting_helper
     "pack2"
diff --git a/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb b/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
index fbfeeaedde..64aa1a0476 100644
--- a/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
+++ b/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Admin
   module UsersHelpeR
   end
diff --git a/actionpack/test/fixtures/layouts/builder.builder b/actionpack/test/fixtures/layouts/builder.builder
index 0f34d03a4c..c55488edd0 100644
--- a/actionpack/test/fixtures/layouts/builder.builder
+++ b/actionpack/test/fixtures/layouts/builder.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.wrapper do
   xml << yield
 end
diff --git a/actionpack/test/fixtures/load_me.rb b/actionpack/test/fixtures/load_me.rb
index e826cba0f7..e516512a4e 100644
--- a/actionpack/test/fixtures/load_me.rb
+++ b/actionpack/test/fixtures/load_me.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class LoadMe
 end
diff --git a/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder b/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
index d2761ed8c3..15c8a7f5cf 100644
--- a/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
+++ b/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/respond_to/using_defaults.xml.builder b/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
index d2761ed8c3..15c8a7f5cf 100644
--- a/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
+++ b/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder b/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
index d2761ed8c3..15c8a7f5cf 100644
--- a/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
+++ b/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/ruby_template.ruby b/actionpack/test/fixtures/ruby_template.ruby
index cae21339f5..5097bce47c 100644
--- a/actionpack/test/fixtures/ruby_template.ruby
+++ b/actionpack/test/fixtures/ruby_template.ruby
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 body = ""
 body << ["Hello", "from", "Ruby", "code"].join(" ")
diff --git a/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb b/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
index cb488a595b..18fa5cd923 100644
--- a/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
+++ b/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module SessionAutoloadTest
   class Foo
     def initialize(bar = "baz")
diff --git a/actionpack/test/fixtures/test/formatted_xml_erb.builder b/actionpack/test/fixtures/test/formatted_xml_erb.builder
index 568a2ddefe..f98aaa34a5 100644
--- a/actionpack/test/fixtures/test/formatted_xml_erb.builder
+++ b/actionpack/test/fixtures/test/formatted_xml_erb.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.test "failed"
diff --git a/actionpack/test/fixtures/test/hello_xml_world.builder b/actionpack/test/fixtures/test/hello_xml_world.builder
index c496fb4160..d16bb6b5cb 100644
--- a/actionpack/test/fixtures/test/hello_xml_world.builder
+++ b/actionpack/test/fixtures/test/hello_xml_world.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.html do
   xml.head do
     xml.title "Hello World"
diff --git a/actionpack/test/fixtures/test/implicit_content_type.atom.builder b/actionpack/test/fixtures/test/implicit_content_type.atom.builder
index bcb3c79f0b..2fcb32d247 100644
--- a/actionpack/test/fixtures/test/implicit_content_type.atom.builder
+++ b/actionpack/test/fixtures/test/implicit_content_type.atom.builder
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 xml.atom do
 end
diff --git a/actionpack/test/journey/gtg/builder_test.rb b/actionpack/test/journey/gtg/builder_test.rb
index f48394a243..aa8427b265 100644
--- a/actionpack/test/journey/gtg/builder_test.rb
+++ b/actionpack/test/journey/gtg/builder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/gtg/transition_table_test.rb b/actionpack/test/journey/gtg/transition_table_test.rb
index 1f908c7c37..889640fdd7 100644
--- a/actionpack/test/journey/gtg/transition_table_test.rb
+++ b/actionpack/test/journey/gtg/transition_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json/decoding"
 
diff --git a/actionpack/test/journey/nfa/simulator_test.rb b/actionpack/test/journey/nfa/simulator_test.rb
index d3a216d4a5..38f99398cb 100644
--- a/actionpack/test/journey/nfa/simulator_test.rb
+++ b/actionpack/test/journey/nfa/simulator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/nfa/transition_table_test.rb b/actionpack/test/journey/nfa/transition_table_test.rb
index 264a8c2a37..0bc6bc1cf8 100644
--- a/actionpack/test/journey/nfa/transition_table_test.rb
+++ b/actionpack/test/journey/nfa/transition_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/nodes/symbol_test.rb b/actionpack/test/journey/nodes/symbol_test.rb
index d4e1753b4a..baf60f40b8 100644
--- a/actionpack/test/journey/nodes/symbol_test.rb
+++ b/actionpack/test/journey/nodes/symbol_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/path/pattern_test.rb b/actionpack/test/journey/path/pattern_test.rb
index 716f2a352c..2c74617944 100644
--- a/actionpack/test/journey/path/pattern_test.rb
+++ b/actionpack/test/journey/path/pattern_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route/definition/parser_test.rb b/actionpack/test/journey/route/definition/parser_test.rb
index bbb521957f..8c6e3c0371 100644
--- a/actionpack/test/journey/route/definition/parser_test.rb
+++ b/actionpack/test/journey/route/definition/parser_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route/definition/scanner_test.rb b/actionpack/test/journey/route/definition/scanner_test.rb
index e39a4b41e2..98578ddbf1 100644
--- a/actionpack/test/journey/route/definition/scanner_test.rb
+++ b/actionpack/test/journey/route/definition/scanner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route_test.rb b/actionpack/test/journey/route_test.rb
index 8c4d5fb0f8..8fd73970b8 100644
--- a/actionpack/test/journey/route_test.rb
+++ b/actionpack/test/journey/route_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/router/utils_test.rb b/actionpack/test/journey/router/utils_test.rb
index 69b720afd5..74277a4325 100644
--- a/actionpack/test/journey/router/utils_test.rb
+++ b/actionpack/test/journey/router/utils_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/router_test.rb b/actionpack/test/journey/router_test.rb
index 5399e2aa0b..f223a125a3 100644
--- a/actionpack/test/journey/router_test.rb
+++ b/actionpack/test/journey/router_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/routes_test.rb b/actionpack/test/journey/routes_test.rb
index 9759a3d692..d8db5ffad1 100644
--- a/actionpack/test/journey/routes_test.rb
+++ b/actionpack/test/journey/routes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/lib/controller/fake_controllers.rb b/actionpack/test/lib/controller/fake_controllers.rb
index a9a2003d19..1a2863b689 100644
--- a/actionpack/test/lib/controller/fake_controllers.rb
+++ b/actionpack/test/lib/controller/fake_controllers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ContentController < ActionController::Base; end
 
 module Admin
diff --git a/actionpack/test/lib/controller/fake_models.rb b/actionpack/test/lib/controller/fake_models.rb
index 8af297a5fd..ff37d85ed8 100644
--- a/actionpack/test/lib/controller/fake_models.rb
+++ b/actionpack/test/lib/controller/fake_models.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model"
 
 Customer = Struct.new(:name, :id) do
diff --git a/actionpack/test/routing/helper_test.rb b/actionpack/test/routing/helper_test.rb
index ce3434dd32..0debacedf7 100644
--- a/actionpack/test/routing/helper_test.rb
+++ b/actionpack/test/routing/helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionview/Rakefile b/actionview/Rakefile
index 564971ce14..0fc38e8db4 100644
--- a/actionview/Rakefile
+++ b/actionview/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 require "fileutils"
 require "open3"
diff --git a/actionview/actionview.gemspec b/actionview/actionview.gemspec
index 5455a37c5e..48e79c53ca 100644
--- a/actionview/actionview.gemspec
+++ b/actionview/actionview.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actionview/bin/test b/actionview/bin/test
index c53377cc97..470ce93f10 100755
--- a/actionview/bin/test
+++ b/actionview/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/actionview/lib/action_view.rb b/actionview/lib/action_view.rb
index c125651a64..99c5b831b5 100644
--- a/actionview/lib/action_view.rb
+++ b/actionview/lib/action_view.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionview/lib/action_view/base.rb b/actionview/lib/action_view/base.rb
index 51f8202de4..1808553239 100644
--- a/actionview/lib/action_view/base.rb
+++ b/actionview/lib/action_view/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attr_internal"
 require "active_support/core_ext/module/attribute_accessors"
 require "active_support/ordered_options"
diff --git a/actionview/lib/action_view/buffers.rb b/actionview/lib/action_view/buffers.rb
index 824995582b..089daa6d60 100644
--- a/actionview/lib/action_view/buffers.rb
+++ b/actionview/lib/action_view/buffers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/output_safety"
 
 module ActionView
diff --git a/actionview/lib/action_view/context.rb b/actionview/lib/action_view/context.rb
index 3a24a7692e..31aa73a0cf 100644
--- a/actionview/lib/action_view/context.rb
+++ b/actionview/lib/action_view/context.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module CompiledTemplates #:nodoc:
     # holds compiled template code
diff --git a/actionview/lib/action_view/dependency_tracker.rb b/actionview/lib/action_view/dependency_tracker.rb
index 9128494501..451eeec9d6 100644
--- a/actionview/lib/action_view/dependency_tracker.rb
+++ b/actionview/lib/action_view/dependency_tracker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "action_view/path_set"
 
diff --git a/actionview/lib/action_view/digestor.rb b/actionview/lib/action_view/digestor.rb
index 9a5e11699c..5ddf1ceb66 100644
--- a/actionview/lib/action_view/digestor.rb
+++ b/actionview/lib/action_view/digestor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "action_view/dependency_tracker"
 require "monitor"
diff --git a/actionview/lib/action_view/flows.rb b/actionview/lib/action_view/flows.rb
index d933f05456..6d5f57a570 100644
--- a/actionview/lib/action_view/flows.rb
+++ b/actionview/lib/action_view/flows.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/output_safety"
 
 module ActionView
diff --git a/actionview/lib/action_view/gem_version.rb b/actionview/lib/action_view/gem_version.rb
index 44425b4aa3..92e21d7a4f 100644
--- a/actionview/lib/action_view/gem_version.rb
+++ b/actionview/lib/action_view/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # Returns the version of the currently loaded Action View as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/actionview/lib/action_view/helpers.rb b/actionview/lib/action_view/helpers.rb
index b98041252c..c1b4b4f84b 100644
--- a/actionview/lib/action_view/helpers.rb
+++ b/actionview/lib/action_view/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/benchmarkable"
 
 module ActionView #:nodoc:
diff --git a/actionview/lib/action_view/helpers/active_model_helper.rb b/actionview/lib/action_view/helpers/active_model_helper.rb
index ba3b5801c9..4bb5788a16 100644
--- a/actionview/lib/action_view/helpers/active_model_helper.rb
+++ b/actionview/lib/action_view/helpers/active_model_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "active_support/core_ext/enumerable"
 
diff --git a/actionview/lib/action_view/helpers/asset_tag_helper.rb b/actionview/lib/action_view/helpers/asset_tag_helper.rb
index cfb6579f67..3a854e82d3 100644
--- a/actionview/lib/action_view/helpers/asset_tag_helper.rb
+++ b/actionview/lib/action_view/helpers/asset_tag_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/hash/keys"
 require "action_view/helpers/asset_url_helper"
diff --git a/actionview/lib/action_view/helpers/asset_url_helper.rb b/actionview/lib/action_view/helpers/asset_url_helper.rb
index f9f12fdba5..03bd1eb008 100644
--- a/actionview/lib/action_view/helpers/asset_url_helper.rb
+++ b/actionview/lib/action_view/helpers/asset_url_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "zlib"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/atom_feed_helper.rb b/actionview/lib/action_view/helpers/atom_feed_helper.rb
index a4ec1f9388..3538515aee 100644
--- a/actionview/lib/action_view/helpers/atom_feed_helper.rb
+++ b/actionview/lib/action_view/helpers/atom_feed_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/cache_helper.rb b/actionview/lib/action_view/helpers/cache_helper.rb
index 101fe86e9f..b7c7324f31 100644
--- a/actionview/lib/action_view/helpers/cache_helper.rb
+++ b/actionview/lib/action_view/helpers/cache_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # = Action View Cache Helper
   module Helpers
diff --git a/actionview/lib/action_view/helpers/capture_helper.rb b/actionview/lib/action_view/helpers/capture_helper.rb
index 0865ac0a7e..719592b5c5 100644
--- a/actionview/lib/action_view/helpers/capture_helper.rb
+++ b/actionview/lib/action_view/helpers/capture_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/output_safety"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/controller_helper.rb b/actionview/lib/action_view/helpers/controller_helper.rb
index 0991fc16e0..e86cdca4e4 100644
--- a/actionview/lib/action_view/helpers/controller_helper.rb
+++ b/actionview/lib/action_view/helpers/controller_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attr_internal"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/csrf_helper.rb b/actionview/lib/action_view/helpers/csrf_helper.rb
index f560445b83..2a15d2aa5a 100644
--- a/actionview/lib/action_view/helpers/csrf_helper.rb
+++ b/actionview/lib/action_view/helpers/csrf_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # = Action View CSRF Helper
   module Helpers
diff --git a/actionview/lib/action_view/helpers/date_helper.rb b/actionview/lib/action_view/helpers/date_helper.rb
index 552d9cfeab..d28eec88a1 100644
--- a/actionview/lib/action_view/helpers/date_helper.rb
+++ b/actionview/lib/action_view/helpers/date_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "action_view/helpers/tag_helper"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionview/lib/action_view/helpers/debug_helper.rb b/actionview/lib/action_view/helpers/debug_helper.rb
index 26c97ab2bf..f61ca2c9c2 100644
--- a/actionview/lib/action_view/helpers/debug_helper.rb
+++ b/actionview/lib/action_view/helpers/debug_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # = Action View Debug Helper
   #
diff --git a/actionview/lib/action_view/helpers/form_helper.rb b/actionview/lib/action_view/helpers/form_helper.rb
index 4a1e6ae9bd..4b2561e53d 100644
--- a/actionview/lib/action_view/helpers/form_helper.rb
+++ b/actionview/lib/action_view/helpers/form_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cgi"
 require "action_view/helpers/date_helper"
 require "action_view/helpers/tag_helper"
diff --git a/actionview/lib/action_view/helpers/form_options_helper.rb b/actionview/lib/action_view/helpers/form_options_helper.rb
index 7d0fbce34e..07d4310a4e 100644
--- a/actionview/lib/action_view/helpers/form_options_helper.rb
+++ b/actionview/lib/action_view/helpers/form_options_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cgi"
 require "erb"
 require "action_view/helpers/form_helper"
diff --git a/actionview/lib/action_view/helpers/form_tag_helper.rb b/actionview/lib/action_view/helpers/form_tag_helper.rb
index 8225fa1e38..9fc08b3837 100644
--- a/actionview/lib/action_view/helpers/form_tag_helper.rb
+++ b/actionview/lib/action_view/helpers/form_tag_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cgi"
 require "action_view/helpers/tag_helper"
 require "active_support/core_ext/string/output_safety"
diff --git a/actionview/lib/action_view/helpers/javascript_helper.rb b/actionview/lib/action_view/helpers/javascript_helper.rb
index 6dfbdcac40..6ba70ec081 100644
--- a/actionview/lib/action_view/helpers/javascript_helper.rb
+++ b/actionview/lib/action_view/helpers/javascript_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tag_helper"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/number_helper.rb b/actionview/lib/action_view/helpers/number_helper.rb
index e40041cb74..b6bc5f4f6f 100644
--- a/actionview/lib/action_view/helpers/number_helper.rb
+++ b/actionview/lib/action_view/helpers/number_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/string/output_safety"
 require "active_support/number_helper"
diff --git a/actionview/lib/action_view/helpers/output_safety_helper.rb b/actionview/lib/action_view/helpers/output_safety_helper.rb
index 71e5862698..25defd1276 100644
--- a/actionview/lib/action_view/helpers/output_safety_helper.rb
+++ b/actionview/lib/action_view/helpers/output_safety_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/output_safety"
 
 module ActionView #:nodoc:
diff --git a/actionview/lib/action_view/helpers/record_tag_helper.rb b/actionview/lib/action_view/helpers/record_tag_helper.rb
index 7aca005d46..f7ee573035 100644
--- a/actionview/lib/action_view/helpers/record_tag_helper.rb
+++ b/actionview/lib/action_view/helpers/record_tag_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module RecordTagHelper
diff --git a/actionview/lib/action_view/helpers/rendering_helper.rb b/actionview/lib/action_view/helpers/rendering_helper.rb
index ffb5627805..7d7f2393ff 100644
--- a/actionview/lib/action_view/helpers/rendering_helper.rb
+++ b/actionview/lib/action_view/helpers/rendering_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     # = Action View Rendering
diff --git a/actionview/lib/action_view/helpers/sanitize_helper.rb b/actionview/lib/action_view/helpers/sanitize_helper.rb
index b7757086c3..0abd5bc5dc 100644
--- a/actionview/lib/action_view/helpers/sanitize_helper.rb
+++ b/actionview/lib/action_view/helpers/sanitize_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/try"
 require "rails-html-sanitizer"
 
diff --git a/actionview/lib/action_view/helpers/tag_helper.rb b/actionview/lib/action_view/helpers/tag_helper.rb
index a64d7e396e..306b71c85e 100644
--- a/actionview/lib/action_view/helpers/tag_helper.rb
+++ b/actionview/lib/action_view/helpers/tag_helper.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: true
+# frozen-string-literal: true
 
 require "active_support/core_ext/string/output_safety"
 require "set"
diff --git a/actionview/lib/action_view/helpers/tags.rb b/actionview/lib/action_view/helpers/tags.rb
index ec06617891..a4f6eb0150 100644
--- a/actionview/lib/action_view/helpers/tags.rb
+++ b/actionview/lib/action_view/helpers/tags.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags #:nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/base.rb b/actionview/lib/action_view/helpers/tags/base.rb
index dec1c1f070..0895533a60 100644
--- a/actionview/lib/action_view/helpers/tags/base.rb
+++ b/actionview/lib/action_view/helpers/tags/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/check_box.rb b/actionview/lib/action_view/helpers/tags/check_box.rb
index 88da221eb2..02f87fc89f 100644
--- a/actionview/lib/action_view/helpers/tags/check_box.rb
+++ b/actionview/lib/action_view/helpers/tags/check_box.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/checkable"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/checkable.rb b/actionview/lib/action_view/helpers/tags/checkable.rb
index a3638aa3fa..052e9df662 100644
--- a/actionview/lib/action_view/helpers/tags/checkable.rb
+++ b/actionview/lib/action_view/helpers/tags/checkable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb b/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb
index 1e9f6a1cee..e02b7bdb2e 100644
--- a/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb
+++ b/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/collection_helpers"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/collection_helpers.rb b/actionview/lib/action_view/helpers/tags/collection_helpers.rb
index 7f0296e466..75d237eb35 100644
--- a/actionview/lib/action_view/helpers/tags/collection_helpers.rb
+++ b/actionview/lib/action_view/helpers/tags/collection_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/collection_radio_buttons.rb b/actionview/lib/action_view/helpers/tags/collection_radio_buttons.rb
index 85648991d7..f085a5fb73 100644
--- a/actionview/lib/action_view/helpers/tags/collection_radio_buttons.rb
+++ b/actionview/lib/action_view/helpers/tags/collection_radio_buttons.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/collection_helpers"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/collection_select.rb b/actionview/lib/action_view/helpers/tags/collection_select.rb
index c6a81cf795..4365c714eb 100644
--- a/actionview/lib/action_view/helpers/tags/collection_select.rb
+++ b/actionview/lib/action_view/helpers/tags/collection_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/color_field.rb b/actionview/lib/action_view/helpers/tags/color_field.rb
index c133fcab77..b4bbe92746 100644
--- a/actionview/lib/action_view/helpers/tags/color_field.rb
+++ b/actionview/lib/action_view/helpers/tags/color_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/date_field.rb b/actionview/lib/action_view/helpers/tags/date_field.rb
index 2043a05689..c22be0db29 100644
--- a/actionview/lib/action_view/helpers/tags/date_field.rb
+++ b/actionview/lib/action_view/helpers/tags/date_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/date_select.rb b/actionview/lib/action_view/helpers/tags/date_select.rb
index fdfcad7e48..638c134deb 100644
--- a/actionview/lib/action_view/helpers/tags/date_select.rb
+++ b/actionview/lib/action_view/helpers/tags/date_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/time/calculations"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/datetime_field.rb b/actionview/lib/action_view/helpers/tags/datetime_field.rb
index 4686606806..b3940c7e44 100644
--- a/actionview/lib/action_view/helpers/tags/datetime_field.rb
+++ b/actionview/lib/action_view/helpers/tags/datetime_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/datetime_local_field.rb b/actionview/lib/action_view/helpers/tags/datetime_local_field.rb
index ba0c7fa5f7..b4a74185d1 100644
--- a/actionview/lib/action_view/helpers/tags/datetime_local_field.rb
+++ b/actionview/lib/action_view/helpers/tags/datetime_local_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/datetime_select.rb b/actionview/lib/action_view/helpers/tags/datetime_select.rb
index 3a36e47714..563de1840e 100644
--- a/actionview/lib/action_view/helpers/tags/datetime_select.rb
+++ b/actionview/lib/action_view/helpers/tags/datetime_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/email_field.rb b/actionview/lib/action_view/helpers/tags/email_field.rb
index 4ba0905cfb..7ce3ccb9bf 100644
--- a/actionview/lib/action_view/helpers/tags/email_field.rb
+++ b/actionview/lib/action_view/helpers/tags/email_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/file_field.rb b/actionview/lib/action_view/helpers/tags/file_field.rb
index 201b7fffa5..476b820d84 100644
--- a/actionview/lib/action_view/helpers/tags/file_field.rb
+++ b/actionview/lib/action_view/helpers/tags/file_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/grouped_collection_select.rb b/actionview/lib/action_view/helpers/tags/grouped_collection_select.rb
index 1b3f993b32..20e312dd0f 100644
--- a/actionview/lib/action_view/helpers/tags/grouped_collection_select.rb
+++ b/actionview/lib/action_view/helpers/tags/grouped_collection_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/hidden_field.rb b/actionview/lib/action_view/helpers/tags/hidden_field.rb
index ca5cd395a2..c3757c2461 100644
--- a/actionview/lib/action_view/helpers/tags/hidden_field.rb
+++ b/actionview/lib/action_view/helpers/tags/hidden_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/label.rb b/actionview/lib/action_view/helpers/tags/label.rb
index 9f8dac4bbd..cab15ae201 100644
--- a/actionview/lib/action_view/helpers/tags/label.rb
+++ b/actionview/lib/action_view/helpers/tags/label.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/month_field.rb b/actionview/lib/action_view/helpers/tags/month_field.rb
index ed74ca3f35..4c0fb846ee 100644
--- a/actionview/lib/action_view/helpers/tags/month_field.rb
+++ b/actionview/lib/action_view/helpers/tags/month_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/number_field.rb b/actionview/lib/action_view/helpers/tags/number_field.rb
index fc5adfeab1..4f95b1b4de 100644
--- a/actionview/lib/action_view/helpers/tags/number_field.rb
+++ b/actionview/lib/action_view/helpers/tags/number_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/password_field.rb b/actionview/lib/action_view/helpers/tags/password_field.rb
index 008df0f817..444ef65074 100644
--- a/actionview/lib/action_view/helpers/tags/password_field.rb
+++ b/actionview/lib/action_view/helpers/tags/password_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/placeholderable.rb b/actionview/lib/action_view/helpers/tags/placeholderable.rb
index 5ae57cdeef..cf7b117614 100644
--- a/actionview/lib/action_view/helpers/tags/placeholderable.rb
+++ b/actionview/lib/action_view/helpers/tags/placeholderable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/radio_button.rb b/actionview/lib/action_view/helpers/tags/radio_button.rb
index 538826f749..43dbd32083 100644
--- a/actionview/lib/action_view/helpers/tags/radio_button.rb
+++ b/actionview/lib/action_view/helpers/tags/radio_button.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/checkable"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/range_field.rb b/actionview/lib/action_view/helpers/tags/range_field.rb
index d7c11cc7a4..f98ae88043 100644
--- a/actionview/lib/action_view/helpers/tags/range_field.rb
+++ b/actionview/lib/action_view/helpers/tags/range_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/search_field.rb b/actionview/lib/action_view/helpers/tags/search_field.rb
index 38304d8d73..a848aeabfa 100644
--- a/actionview/lib/action_view/helpers/tags/search_field.rb
+++ b/actionview/lib/action_view/helpers/tags/search_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/select.rb b/actionview/lib/action_view/helpers/tags/select.rb
index 8c166d630f..380f7a8c4e 100644
--- a/actionview/lib/action_view/helpers/tags/select.rb
+++ b/actionview/lib/action_view/helpers/tags/select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/tel_field.rb b/actionview/lib/action_view/helpers/tags/tel_field.rb
index c95127a714..987bb9e67a 100644
--- a/actionview/lib/action_view/helpers/tags/tel_field.rb
+++ b/actionview/lib/action_view/helpers/tags/tel_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/text_area.rb b/actionview/lib/action_view/helpers/tags/text_area.rb
index 6bf3c0c02f..31e3a9e9b1 100644
--- a/actionview/lib/action_view/helpers/tags/text_area.rb
+++ b/actionview/lib/action_view/helpers/tags/text_area.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/placeholderable"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/text_field.rb b/actionview/lib/action_view/helpers/tags/text_field.rb
index 48930770be..613cade7b3 100644
--- a/actionview/lib/action_view/helpers/tags/text_field.rb
+++ b/actionview/lib/action_view/helpers/tags/text_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tags/placeholderable"
 
 module ActionView
diff --git a/actionview/lib/action_view/helpers/tags/time_field.rb b/actionview/lib/action_view/helpers/tags/time_field.rb
index 8c3f082359..0e90a3aed7 100644
--- a/actionview/lib/action_view/helpers/tags/time_field.rb
+++ b/actionview/lib/action_view/helpers/tags/time_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/time_select.rb b/actionview/lib/action_view/helpers/tags/time_select.rb
index d46728698f..0b06311d25 100644
--- a/actionview/lib/action_view/helpers/tags/time_select.rb
+++ b/actionview/lib/action_view/helpers/tags/time_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/time_zone_select.rb b/actionview/lib/action_view/helpers/tags/time_zone_select.rb
index 49e099d38a..80d165ec7e 100644
--- a/actionview/lib/action_view/helpers/tags/time_zone_select.rb
+++ b/actionview/lib/action_view/helpers/tags/time_zone_select.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/translator.rb b/actionview/lib/action_view/helpers/tags/translator.rb
index 0d3ac24689..ced835eaa8 100644
--- a/actionview/lib/action_view/helpers/tags/translator.rb
+++ b/actionview/lib/action_view/helpers/tags/translator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/url_field.rb b/actionview/lib/action_view/helpers/tags/url_field.rb
index 4c474a579f..d76340178d 100644
--- a/actionview/lib/action_view/helpers/tags/url_field.rb
+++ b/actionview/lib/action_view/helpers/tags/url_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/tags/week_field.rb b/actionview/lib/action_view/helpers/tags/week_field.rb
index 08c6fbb81d..835d1667d7 100644
--- a/actionview/lib/action_view/helpers/tags/week_field.rb
+++ b/actionview/lib/action_view/helpers/tags/week_field.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Helpers
     module Tags # :nodoc:
diff --git a/actionview/lib/action_view/helpers/text_helper.rb b/actionview/lib/action_view/helpers/text_helper.rb
index 4fce229276..bc922f9ce8 100644
--- a/actionview/lib/action_view/helpers/text_helper.rb
+++ b/actionview/lib/action_view/helpers/text_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 require "active_support/core_ext/array/extract_options"
 
diff --git a/actionview/lib/action_view/helpers/translation_helper.rb b/actionview/lib/action_view/helpers/translation_helper.rb
index a28acdf1f6..24d1f34c5a 100644
--- a/actionview/lib/action_view/helpers/translation_helper.rb
+++ b/actionview/lib/action_view/helpers/translation_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/tag_helper"
 require "active_support/core_ext/string/access"
 require "i18n/exceptions"
diff --git a/actionview/lib/action_view/helpers/url_helper.rb b/actionview/lib/action_view/helpers/url_helper.rb
index 6bdb8e90ff..b78c367921 100644
--- a/actionview/lib/action_view/helpers/url_helper.rb
+++ b/actionview/lib/action_view/helpers/url_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/helpers/javascript_helper"
 require "active_support/core_ext/array/access"
 require "active_support/core_ext/hash/keys"
diff --git a/actionview/lib/action_view/layouts.rb b/actionview/lib/action_view/layouts.rb
index f5681668e5..ab8409e8d0 100644
--- a/actionview/lib/action_view/layouts.rb
+++ b/actionview/lib/action_view/layouts.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/rendering"
 require "active_support/core_ext/module/remove_method"
 
diff --git a/actionview/lib/action_view/log_subscriber.rb b/actionview/lib/action_view/log_subscriber.rb
index deacf2d001..613be2b877 100644
--- a/actionview/lib/action_view/log_subscriber.rb
+++ b/actionview/lib/action_view/log_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/log_subscriber"
 
 module ActionView
diff --git a/actionview/lib/action_view/lookup_context.rb b/actionview/lib/action_view/lookup_context.rb
index 0220ac3a42..b7dbb38369 100644
--- a/actionview/lib/action_view/lookup_context.rb
+++ b/actionview/lib/action_view/lookup_context.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "active_support/core_ext/module/remove_method"
 require "active_support/core_ext/module/attribute_accessors"
diff --git a/actionview/lib/action_view/model_naming.rb b/actionview/lib/action_view/model_naming.rb
index 5eab00cd1a..b6ed13424e 100644
--- a/actionview/lib/action_view/model_naming.rb
+++ b/actionview/lib/action_view/model_naming.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module ModelNaming #:nodoc:
     # Converts the given object to an ActiveModel compliant one.
diff --git a/actionview/lib/action_view/path_set.rb b/actionview/lib/action_view/path_set.rb
index 0ac5778273..6688519ffd 100644
--- a/actionview/lib/action_view/path_set.rb
+++ b/actionview/lib/action_view/path_set.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView #:nodoc:
   # = Action View PathSet
   #
diff --git a/actionview/lib/action_view/railtie.rb b/actionview/lib/action_view/railtie.rb
index 3971dc0aed..61678933e9 100644
--- a/actionview/lib/action_view/railtie.rb
+++ b/actionview/lib/action_view/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view"
 require "rails"
 
diff --git a/actionview/lib/action_view/record_identifier.rb b/actionview/lib/action_view/record_identifier.rb
index 885f935248..48bea315a9 100644
--- a/actionview/lib/action_view/record_identifier.rb
+++ b/actionview/lib/action_view/record_identifier.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module"
 require "action_view/model_naming"
 
diff --git a/actionview/lib/action_view/renderer/abstract_renderer.rb b/actionview/lib/action_view/renderer/abstract_renderer.rb
index 217b05b5f3..0b315eb569 100644
--- a/actionview/lib/action_view/renderer/abstract_renderer.rb
+++ b/actionview/lib/action_view/renderer/abstract_renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # This class defines the interface for a renderer. Each class that
   # subclasses +AbstractRenderer+ is used by the base +Renderer+ class to
diff --git a/actionview/lib/action_view/renderer/partial_renderer.rb b/actionview/lib/action_view/renderer/partial_renderer.rb
index 0bc414677f..1f8f997a2d 100644
--- a/actionview/lib/action_view/renderer/partial_renderer.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "action_view/renderer/partial_renderer/collection_caching"
 
diff --git a/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
index 61cb6c90b9..32663fb80d 100644
--- a/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module CollectionCaching # :nodoc:
     extend ActiveSupport::Concern
diff --git a/actionview/lib/action_view/renderer/renderer.rb b/actionview/lib/action_view/renderer/renderer.rb
index 07461d3e2e..bcdeb85d30 100644
--- a/actionview/lib/action_view/renderer/renderer.rb
+++ b/actionview/lib/action_view/renderer/renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   # This is the main entry point for rendering. It basically delegates
   # to other objects like TemplateRenderer and PartialRenderer which
diff --git a/actionview/lib/action_view/renderer/streaming_template_renderer.rb b/actionview/lib/action_view/renderer/streaming_template_renderer.rb
index 40d7ce63a6..62ce985243 100644
--- a/actionview/lib/action_view/renderer/streaming_template_renderer.rb
+++ b/actionview/lib/action_view/renderer/streaming_template_renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fiber"
 
 module ActionView
diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb
index 1fe95a5f67..54317199de 100644
--- a/actionview/lib/action_view/renderer/template_renderer.rb
+++ b/actionview/lib/action_view/renderer/template_renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/try"
 
 module ActionView
diff --git a/actionview/lib/action_view/rendering.rb b/actionview/lib/action_view/rendering.rb
index 29cdbf37cb..cf18562c45 100644
--- a/actionview/lib/action_view/rendering.rb
+++ b/actionview/lib/action_view/rendering.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/view_paths"
 
 module ActionView
diff --git a/actionview/lib/action_view/routing_url_for.rb b/actionview/lib/action_view/routing_url_for.rb
index 3f6b59cf98..687ba7c1b4 100644
--- a/actionview/lib/action_view/routing_url_for.rb
+++ b/actionview/lib/action_view/routing_url_for.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_dispatch/routing/polymorphic_routes"
 
 module ActionView
diff --git a/actionview/lib/action_view/tasks/cache_digests.rake b/actionview/lib/action_view/tasks/cache_digests.rake
index 929bace6d4..d30b3f7797 100644
--- a/actionview/lib/action_view/tasks/cache_digests.rake
+++ b/actionview/lib/action_view/tasks/cache_digests.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :cache_digests do
   desc "Lookup nested dependencies for TEMPLATE (like messages/show or comments/_comment.html)"
   task nested_dependencies: :environment do
diff --git a/actionview/lib/action_view/template.rb b/actionview/lib/action_view/template.rb
index 80b294dc3d..3f2546664e 100644
--- a/actionview/lib/action_view/template.rb
+++ b/actionview/lib/action_view/template.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/try"
 require "active_support/core_ext/kernel/singleton_class"
 require "thread"
diff --git a/actionview/lib/action_view/template/error.rb b/actionview/lib/action_view/template/error.rb
index c2f13eb77c..cc90477190 100644
--- a/actionview/lib/action_view/template/error.rb
+++ b/actionview/lib/action_view/template/error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/enumerable"
 
 module ActionView
diff --git a/actionview/lib/action_view/template/handlers.rb b/actionview/lib/action_view/template/handlers.rb
index d5300ea659..f4301f6f07 100644
--- a/actionview/lib/action_view/template/handlers.rb
+++ b/actionview/lib/action_view/template/handlers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView #:nodoc:
   # = Action View Template Handlers
   class Template
diff --git a/actionview/lib/action_view/template/handlers/builder.rb b/actionview/lib/action_view/template/handlers/builder.rb
index f8f5b96704..67ad78133d 100644
--- a/actionview/lib/action_view/template/handlers/builder.rb
+++ b/actionview/lib/action_view/template/handlers/builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Template::Handlers
     class Builder
diff --git a/actionview/lib/action_view/template/handlers/erb.rb b/actionview/lib/action_view/template/handlers/erb.rb
index fc2a901fa9..48c2e22a89 100644
--- a/actionview/lib/action_view/template/handlers/erb.rb
+++ b/actionview/lib/action_view/template/handlers/erb.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   class Template
     module Handlers
diff --git a/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb b/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb
index 59d6018f93..427ea20064 100644
--- a/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb
+++ b/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ::ActiveSupport::Deprecation.warn("ActionView::Template::Handlers::Erubis is deprecated and will be removed from Rails 5.2. Switch to ActionView::Template::Handlers::ERB::Erubi instead.")
 
 module ActionView
diff --git a/actionview/lib/action_view/template/handlers/erb/erubi.rb b/actionview/lib/action_view/template/handlers/erb/erubi.rb
index 85750d57ca..755cc84015 100644
--- a/actionview/lib/action_view/template/handlers/erb/erubi.rb
+++ b/actionview/lib/action_view/template/handlers/erb/erubi.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "erubi"
 
 module ActionView
diff --git a/actionview/lib/action_view/template/handlers/erb/erubis.rb b/actionview/lib/action_view/template/handlers/erb/erubis.rb
index 43a3731f8b..f3c35e1aec 100644
--- a/actionview/lib/action_view/template/handlers/erb/erubis.rb
+++ b/actionview/lib/action_view/template/handlers/erb/erubis.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 gem "erubis"
 require "erubis"
 
diff --git a/actionview/lib/action_view/template/handlers/html.rb b/actionview/lib/action_view/template/handlers/html.rb
index 215de5cfa2..ccaa8d1469 100644
--- a/actionview/lib/action_view/template/handlers/html.rb
+++ b/actionview/lib/action_view/template/handlers/html.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Template::Handlers
     class Html < Raw
diff --git a/actionview/lib/action_view/template/handlers/raw.rb b/actionview/lib/action_view/template/handlers/raw.rb
index 6fc46aaa93..e7519e94f9 100644
--- a/actionview/lib/action_view/template/handlers/raw.rb
+++ b/actionview/lib/action_view/template/handlers/raw.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module Template::Handlers
     class Raw
diff --git a/actionview/lib/action_view/template/html.rb b/actionview/lib/action_view/template/html.rb
index e2d2d05ec7..0ffae10432 100644
--- a/actionview/lib/action_view/template/html.rb
+++ b/actionview/lib/action_view/template/html.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView #:nodoc:
   # = Action View HTML Template
   class Template
diff --git a/actionview/lib/action_view/template/resolver.rb b/actionview/lib/action_view/template/resolver.rb
index 837396bdfd..65f8be26a0 100644
--- a/actionview/lib/action_view/template/resolver.rb
+++ b/actionview/lib/action_view/template/resolver.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "pathname"
 require "active_support/core_ext/class"
 require "active_support/core_ext/module/attribute_accessors"
diff --git a/actionview/lib/action_view/template/text.rb b/actionview/lib/action_view/template/text.rb
index 8249b27aa0..380528d6ef 100644
--- a/actionview/lib/action_view/template/text.rb
+++ b/actionview/lib/action_view/template/text.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView #:nodoc:
   # = Action View Text Template
   class Template
diff --git a/actionview/lib/action_view/template/types.rb b/actionview/lib/action_view/template/types.rb
index 6f00fd0a3b..21959a3798 100644
--- a/actionview/lib/action_view/template/types.rb
+++ b/actionview/lib/action_view/template/types.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module ActionView
diff --git a/actionview/lib/action_view/test_case.rb b/actionview/lib/action_view/test_case.rb
index 0df1314395..424a86ba3e 100644
--- a/actionview/lib/action_view/test_case.rb
+++ b/actionview/lib/action_view/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/remove_method"
 require "action_controller"
 require "action_controller/test_case"
diff --git a/actionview/lib/action_view/testing/resolvers.rb b/actionview/lib/action_view/testing/resolvers.rb
index acd5dc4cb4..b2d3e10690 100644
--- a/actionview/lib/action_view/testing/resolvers.rb
+++ b/actionview/lib/action_view/testing/resolvers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "action_view/template/resolver"
 
 module ActionView #:nodoc:
diff --git a/actionview/lib/action_view/version.rb b/actionview/lib/action_view/version.rb
index 3d4e517f99..315404864d 100644
--- a/actionview/lib/action_view/version.rb
+++ b/actionview/lib/action_view/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionView
diff --git a/actionview/lib/action_view/view_paths.rb b/actionview/lib/action_view/view_paths.rb
index bbff56f88d..938f0fc17f 100644
--- a/actionview/lib/action_view/view_paths.rb
+++ b/actionview/lib/action_view/view_paths.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActionView
   module ViewPaths
     extend ActiveSupport::Concern
diff --git a/actionview/test/abstract_unit.rb b/actionview/test/abstract_unit.rb
index da554b830c..a7d706c5e1 100644
--- a/actionview/test/abstract_unit.rb
+++ b/actionview/test/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $:.unshift File.expand_path("lib", __dir__)
 $:.unshift File.expand_path("fixtures/helpers", __dir__)
 $:.unshift File.expand_path("fixtures/alternate_helpers", __dir__)
diff --git a/actionview/test/actionpack/abstract/abstract_controller_test.rb b/actionview/test/actionpack/abstract/abstract_controller_test.rb
index 7714f97605..8f65a61493 100644
--- a/actionview/test/actionpack/abstract/abstract_controller_test.rb
+++ b/actionview/test/actionpack/abstract/abstract_controller_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "set"
 
diff --git a/actionview/test/actionpack/abstract/helper_test.rb b/actionview/test/actionpack/abstract/helper_test.rb
index e3a1614057..13922e4485 100644
--- a/actionview/test/actionpack/abstract/helper_test.rb
+++ b/actionview/test/actionpack/abstract/helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 ActionController::Base.helpers_path = File.expand_path("../../fixtures/helpers", __dir__)
diff --git a/actionview/test/actionpack/abstract/layouts_test.rb b/actionview/test/actionpack/abstract/layouts_test.rb
index e733dc43af..4ece992597 100644
--- a/actionview/test/actionpack/abstract/layouts_test.rb
+++ b/actionview/test/actionpack/abstract/layouts_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractControllerTests
diff --git a/actionview/test/actionpack/abstract/render_test.rb b/actionview/test/actionpack/abstract/render_test.rb
index 017e9ed2ff..8b0c54fb77 100644
--- a/actionview/test/actionpack/abstract/render_test.rb
+++ b/actionview/test/actionpack/abstract/render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionview/test/actionpack/controller/capture_test.rb b/actionview/test/actionpack/controller/capture_test.rb
index 19167333ae..cc3a23c60c 100644
--- a/actionview/test/actionpack/controller/capture_test.rb
+++ b/actionview/test/actionpack/controller/capture_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/logger"
 
diff --git a/actionview/test/actionpack/controller/layout_test.rb b/actionview/test/actionpack/controller/layout_test.rb
index 8af6539056..b3e0329f57 100644
--- a/actionview/test/actionpack/controller/layout_test.rb
+++ b/actionview/test/actionpack/controller/layout_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array/extract_options"
 
diff --git a/actionview/test/actionpack/controller/render_test.rb b/actionview/test/actionpack/controller/render_test.rb
index c7990f8d96..6528169312 100644
--- a/actionview/test/actionpack/controller/render_test.rb
+++ b/actionview/test/actionpack/controller/render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_model"
 require "controller/fake_models"
diff --git a/actionview/test/actionpack/controller/view_paths_test.rb b/actionview/test/actionpack/controller/view_paths_test.rb
index a0e9842dbf..4c58b959a9 100644
--- a/actionview/test/actionpack/controller/view_paths_test.rb
+++ b/actionview/test/actionpack/controller/view_paths_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ViewLoadPathsTest < ActionController::TestCase
diff --git a/actionview/test/active_record_unit.rb b/actionview/test/active_record_unit.rb
index 23d5d9814f..901c0e2b3e 100644
--- a/actionview/test/active_record_unit.rb
+++ b/actionview/test/active_record_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 # Define the essentials
diff --git a/actionview/test/activerecord/controller_runtime_test.rb b/actionview/test/activerecord/controller_runtime_test.rb
index 176d9e6d8c..1cec5072c0 100644
--- a/actionview/test/activerecord/controller_runtime_test.rb
+++ b/actionview/test/activerecord/controller_runtime_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 require "active_record/railties/controller_runtime"
 require "fixtures/project"
diff --git a/actionview/test/activerecord/debug_helper_test.rb b/actionview/test/activerecord/debug_helper_test.rb
index 6ada7a3e42..06ae555a03 100644
--- a/actionview/test/activerecord/debug_helper_test.rb
+++ b/actionview/test/activerecord/debug_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 require "nokogiri"
 
diff --git a/actionview/test/activerecord/form_helper_activerecord_test.rb b/actionview/test/activerecord/form_helper_activerecord_test.rb
index 099b5322ab..9949c3fde0 100644
--- a/actionview/test/activerecord/form_helper_activerecord_test.rb
+++ b/actionview/test/activerecord/form_helper_activerecord_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 require "fixtures/project"
 require "fixtures/developer"
diff --git a/actionview/test/activerecord/polymorphic_routes_test.rb b/actionview/test/activerecord/polymorphic_routes_test.rb
index 2fd538fee0..b2e0fb08c4 100644
--- a/actionview/test/activerecord/polymorphic_routes_test.rb
+++ b/actionview/test/activerecord/polymorphic_routes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 require "fixtures/project"
 
diff --git a/actionview/test/activerecord/relation_cache_test.rb b/actionview/test/activerecord/relation_cache_test.rb
index a6d8f2d278..d12c426586 100644
--- a/actionview/test/activerecord/relation_cache_test.rb
+++ b/actionview/test/activerecord/relation_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 
 class RelationCacheTest < ActionView::TestCase
diff --git a/actionview/test/activerecord/render_partial_with_record_identification_test.rb b/actionview/test/activerecord/render_partial_with_record_identification_test.rb
index 88e72599d4..60c3ab3045 100644
--- a/actionview/test/activerecord/render_partial_with_record_identification_test.rb
+++ b/actionview/test/activerecord/render_partial_with_record_identification_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record_unit"
 
 class RenderPartialWithRecordIdentificationController < ActionController::Base
diff --git a/actionview/test/fixtures/actionpack/layouts/builder.builder b/actionview/test/fixtures/actionpack/layouts/builder.builder
index 0f34d03a4c..c55488edd0 100644
--- a/actionview/test/fixtures/actionpack/layouts/builder.builder
+++ b/actionview/test/fixtures/actionpack/layouts/builder.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.wrapper do
   xml << yield
 end
diff --git a/actionview/test/fixtures/actionpack/test/_hello.builder b/actionview/test/fixtures/actionpack/test/_hello.builder
index a767060f3c..fc72df16d0 100644
--- a/actionview/test/fixtures/actionpack/test/_hello.builder
+++ b/actionview/test/fixtures/actionpack/test/_hello.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xm.hello
diff --git a/actionview/test/fixtures/actionpack/test/formatted_xml_erb.builder b/actionview/test/fixtures/actionpack/test/formatted_xml_erb.builder
index 568a2ddefe..f98aaa34a5 100644
--- a/actionview/test/fixtures/actionpack/test/formatted_xml_erb.builder
+++ b/actionview/test/fixtures/actionpack/test/formatted_xml_erb.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.test "failed"
diff --git a/actionview/test/fixtures/actionpack/test/hello.builder b/actionview/test/fixtures/actionpack/test/hello.builder
index 205ad8722f..b8ab17ad5b 100644
--- a/actionview/test/fixtures/actionpack/test/hello.builder
+++ b/actionview/test/fixtures/actionpack/test/hello.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.html do
   xml.p "Hello #{@name}"
   xml << render(file: "test/greeting")
diff --git a/actionview/test/fixtures/actionpack/test/hello_world_container.builder b/actionview/test/fixtures/actionpack/test/hello_world_container.builder
index f0291694ee..24032ab5e0 100644
--- a/actionview/test/fixtures/actionpack/test/hello_world_container.builder
+++ b/actionview/test/fixtures/actionpack/test/hello_world_container.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.test do
   render partial: "hello", locals: { xm: xml }
 end
diff --git a/actionview/test/fixtures/actionpack/test/hello_world_from_rxml.builder b/actionview/test/fixtures/actionpack/test/hello_world_from_rxml.builder
index 2a87fd1a3d..619a97ba96 100644
--- a/actionview/test/fixtures/actionpack/test/hello_world_from_rxml.builder
+++ b/actionview/test/fixtures/actionpack/test/hello_world_from_rxml.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.html do
   xml.p "Hello"
 end
diff --git a/actionview/test/fixtures/actionpack/test/hello_xml_world.builder b/actionview/test/fixtures/actionpack/test/hello_xml_world.builder
index c496fb4160..d16bb6b5cb 100644
--- a/actionview/test/fixtures/actionpack/test/hello_xml_world.builder
+++ b/actionview/test/fixtures/actionpack/test/hello_xml_world.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.html do
   xml.head do
     xml.title "Hello World"
diff --git a/actionview/test/fixtures/actionpack/test/implicit_content_type.atom.builder b/actionview/test/fixtures/actionpack/test/implicit_content_type.atom.builder
index bcb3c79f0b..2fcb32d247 100644
--- a/actionview/test/fixtures/actionpack/test/implicit_content_type.atom.builder
+++ b/actionview/test/fixtures/actionpack/test/implicit_content_type.atom.builder
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 xml.atom do
 end
diff --git a/actionview/test/fixtures/actionpack/test/non_erb_block_content_for.builder b/actionview/test/fixtures/actionpack/test/non_erb_block_content_for.builder
index 4db7d66d90..cd65da751b 100644
--- a/actionview/test/fixtures/actionpack/test/non_erb_block_content_for.builder
+++ b/actionview/test/fixtures/actionpack/test/non_erb_block_content_for.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 content_for :title do
   "Putting stuff in the title!"
 end
diff --git a/actionview/test/fixtures/comments/empty.html.builder b/actionview/test/fixtures/comments/empty.html.builder
index ecc1078747..12d6fdd9a5 100644
--- a/actionview/test/fixtures/comments/empty.html.builder
+++ b/actionview/test/fixtures/comments/empty.html.builder
@@ -1,2 +1 @@
-# frozen_string_literal: true
 xml.h1 "No Comment"
diff --git a/actionview/test/fixtures/company.rb b/actionview/test/fixtures/company.rb
index 18a197947a..9f527acdd8 100644
--- a/actionview/test/fixtures/company.rb
+++ b/actionview/test/fixtures/company.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Company < ActiveRecord::Base
   has_one :mascot
   self.sequence_name = :companies_nonstd_seq
diff --git a/actionview/test/fixtures/developer.rb b/actionview/test/fixtures/developer.rb
index 59f5f17efe..1a686a33ce 100644
--- a/actionview/test/fixtures/developer.rb
+++ b/actionview/test/fixtures/developer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Developer < ActiveRecord::Base
   has_and_belongs_to_many :projects
   has_many :replies
diff --git a/actionview/test/fixtures/helpers/abc_helper.rb b/actionview/test/fixtures/helpers/abc_helper.rb
index a743c7ee9a..cf2774bb5f 100644
--- a/actionview/test/fixtures/helpers/abc_helper.rb
+++ b/actionview/test/fixtures/helpers/abc_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AbcHelper
   def bare_a() end
 end
diff --git a/actionview/test/fixtures/helpers/helpery_test_helper.rb b/actionview/test/fixtures/helpers/helpery_test_helper.rb
index af67fe1c5c..a4f2951efa 100644
--- a/actionview/test/fixtures/helpers/helpery_test_helper.rb
+++ b/actionview/test/fixtures/helpers/helpery_test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module HelperyTestHelper
   def helpery_test
     "Default"
diff --git a/actionview/test/fixtures/helpers_missing/invalid_require_helper.rb b/actionview/test/fixtures/helpers_missing/invalid_require_helper.rb
index d1d66a7161..6ac6677daa 100644
--- a/actionview/test/fixtures/helpers_missing/invalid_require_helper.rb
+++ b/actionview/test/fixtures/helpers_missing/invalid_require_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "very_invalid_file_name"
 
 module InvalidRequireHelper
diff --git a/actionview/test/fixtures/mascot.rb b/actionview/test/fixtures/mascot.rb
index 212303b838..1c0bd7c8fd 100644
--- a/actionview/test/fixtures/mascot.rb
+++ b/actionview/test/fixtures/mascot.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Mascot < ActiveRecord::Base
   belongs_to :company
 end
diff --git a/actionview/test/fixtures/project.rb b/actionview/test/fixtures/project.rb
index a9e4bb44d6..404b12cbab 100644
--- a/actionview/test/fixtures/project.rb
+++ b/actionview/test/fixtures/project.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Project < ActiveRecord::Base
   has_and_belongs_to_many :developers, -> { uniq }
 
diff --git a/actionview/test/fixtures/reply.rb b/actionview/test/fixtures/reply.rb
index e9a7828d2d..047522c55b 100644
--- a/actionview/test/fixtures/reply.rb
+++ b/actionview/test/fixtures/reply.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Reply < ActiveRecord::Base
   scope :base, -> { all }
   belongs_to :topic, -> { includes(:replies) }
diff --git a/actionview/test/fixtures/ruby_template.ruby b/actionview/test/fixtures/ruby_template.ruby
index 17eda89ad7..93334610a8 100644
--- a/actionview/test/fixtures/ruby_template.ruby
+++ b/actionview/test/fixtures/ruby_template.ruby
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 body = "".dup
 body << ["Hello", "from", "Ruby", "code"].join(" ")
diff --git a/actionview/test/fixtures/test/hello.builder b/actionview/test/fixtures/test/hello.builder
index 205ad8722f..b8ab17ad5b 100644
--- a/actionview/test/fixtures/test/hello.builder
+++ b/actionview/test/fixtures/test/hello.builder
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 xml.html do
   xml.p "Hello #{@name}"
   xml << render(file: "test/greeting")
diff --git a/actionview/test/fixtures/topic.rb b/actionview/test/fixtures/topic.rb
index 7e66f53bd5..48a3dfba88 100644
--- a/actionview/test/fixtures/topic.rb
+++ b/actionview/test/fixtures/topic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Topic < ActiveRecord::Base
   has_many :replies, dependent: :destroy
 end
diff --git a/actionview/test/lib/controller/fake_models.rb b/actionview/test/lib/controller/fake_models.rb
index c419984997..5250101220 100644
--- a/actionview/test/lib/controller/fake_models.rb
+++ b/actionview/test/lib/controller/fake_models.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model"
 
 Customer = Struct.new(:name, :id) do
diff --git a/actionview/test/template/active_model_helper_test.rb b/actionview/test/template/active_model_helper_test.rb
index 030c36b1b2..6b63aa25a5 100644
--- a/actionview/test/template/active_model_helper_test.rb
+++ b/actionview/test/template/active_model_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ActiveModelHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/asset_tag_helper_test.rb b/actionview/test/template/asset_tag_helper_test.rb
index 3f837ffc33..d1190b1bd7 100644
--- a/actionview/test/template/asset_tag_helper_test.rb
+++ b/actionview/test/template/asset_tag_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/ordered_options"
 
diff --git a/actionview/test/template/atom_feed_helper_test.rb b/actionview/test/template/atom_feed_helper_test.rb
index fd31dd09f8..7fa5e042fb 100644
--- a/actionview/test/template/atom_feed_helper_test.rb
+++ b/actionview/test/template/atom_feed_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 Scroll = Struct.new(:id, :to_param, :title, :body, :updated_at, :created_at) do
diff --git a/actionview/test/template/capture_helper_test.rb b/actionview/test/template/capture_helper_test.rb
index 657fda405e..7f37523eeb 100644
--- a/actionview/test/template/capture_helper_test.rb
+++ b/actionview/test/template/capture_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class CaptureHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/compiled_templates_test.rb b/actionview/test/template/compiled_templates_test.rb
index 5135b1e90b..adb2be9be4 100644
--- a/actionview/test/template/compiled_templates_test.rb
+++ b/actionview/test/template/compiled_templates_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class CompiledTemplatesTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/controller_helper_test.rb b/actionview/test/template/controller_helper_test.rb
index 1b6f1b95c2..8dd0cedb75 100644
--- a/actionview/test/template/controller_helper_test.rb
+++ b/actionview/test/template/controller_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ControllerHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/date_helper_i18n_test.rb b/actionview/test/template/date_helper_i18n_test.rb
index eee4340958..207c8a683e 100644
--- a/actionview/test/template/date_helper_i18n_test.rb
+++ b/actionview/test/template/date_helper_i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class DateHelperDistanceOfTimeInWordsI18nTests < ActiveSupport::TestCase
diff --git a/actionview/test/template/date_helper_test.rb b/actionview/test/template/date_helper_test.rb
index 235ac9f338..b9b8194e69 100644
--- a/actionview/test/template/date_helper_test.rb
+++ b/actionview/test/template/date_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class DateHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/dependency_tracker_test.rb b/actionview/test/template/dependency_tracker_test.rb
index f3c1ab4fbf..89917035ff 100644
--- a/actionview/test/template/dependency_tracker_test.rb
+++ b/actionview/test/template/dependency_tracker_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_view/dependency_tracker"
 
diff --git a/actionview/test/template/digestor_test.rb b/actionview/test/template/digestor_test.rb
index b8cae0ab66..de04f3f25d 100644
--- a/actionview/test/template/digestor_test.rb
+++ b/actionview/test/template/digestor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "fileutils"
 require "action_view/dependency_tracker"
diff --git a/actionview/test/template/erb/deprecated_erubis_implementation_test.rb b/actionview/test/template/erb/deprecated_erubis_implementation_test.rb
index 511dbf8008..aaf99f85c0 100644
--- a/actionview/test/template/erb/deprecated_erubis_implementation_test.rb
+++ b/actionview/test/template/erb/deprecated_erubis_implementation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ERBTest
diff --git a/actionview/test/template/erb/form_for_test.rb b/actionview/test/template/erb/form_for_test.rb
index e251083fc8..e722b40a9a 100644
--- a/actionview/test/template/erb/form_for_test.rb
+++ b/actionview/test/template/erb/form_for_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "template/erb/helper"
 
diff --git a/actionview/test/template/erb/helper.rb b/actionview/test/template/erb/helper.rb
index 78fc0d4290..bc1eedc15f 100644
--- a/actionview/test/template/erb/helper.rb
+++ b/actionview/test/template/erb/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ERBTest
   class ViewContext
     include ActionView::Helpers::UrlHelper
diff --git a/actionview/test/template/erb/tag_helper_test.rb b/actionview/test/template/erb/tag_helper_test.rb
index 65ded0aaf5..233f37c48a 100644
--- a/actionview/test/template/erb/tag_helper_test.rb
+++ b/actionview/test/template/erb/tag_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "template/erb/helper"
 
diff --git a/actionview/test/template/erb_util_test.rb b/actionview/test/template/erb_util_test.rb
index 69d092b6c6..4412ea37fa 100644
--- a/actionview/test/template/erb_util_test.rb
+++ b/actionview/test/template/erb_util_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json"
 
diff --git a/actionview/test/template/form_collections_helper_test.rb b/actionview/test/template/form_collections_helper_test.rb
index ddc2619e7a..6160524eb3 100644
--- a/actionview/test/template/form_collections_helper_test.rb
+++ b/actionview/test/template/form_collections_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 Category = Struct.new(:id, :name)
diff --git a/actionview/test/template/form_helper/form_with_test.rb b/actionview/test/template/form_helper/form_with_test.rb
index cbfe97159d..df81315b9c 100644
--- a/actionview/test/template/form_helper/form_with_test.rb
+++ b/actionview/test/template/form_helper/form_with_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionview/test/template/form_helper_test.rb b/actionview/test/template/form_helper_test.rb
index 6e67da5555..50dee1e999 100644
--- a/actionview/test/template/form_helper_test.rb
+++ b/actionview/test/template/form_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionview/test/template/form_options_helper_i18n_test.rb b/actionview/test/template/form_options_helper_i18n_test.rb
index e23bd94307..a1048fbb89 100644
--- a/actionview/test/template/form_options_helper_i18n_test.rb
+++ b/actionview/test/template/form_options_helper_i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class FormOptionsHelperI18nTests < ActionView::TestCase
diff --git a/actionview/test/template/form_options_helper_test.rb b/actionview/test/template/form_options_helper_test.rb
index faeb84faef..3247f20ba7 100644
--- a/actionview/test/template/form_options_helper_test.rb
+++ b/actionview/test/template/form_options_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class Map < Hash
diff --git a/actionview/test/template/form_tag_helper_test.rb b/actionview/test/template/form_tag_helper_test.rb
index f4a26e232d..7ac15db9fe 100644
--- a/actionview/test/template/form_tag_helper_test.rb
+++ b/actionview/test/template/form_tag_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class FormTagHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/html_test.rb b/actionview/test/template/html_test.rb
index 17560287bc..60f4b0aee6 100644
--- a/actionview/test/template/html_test.rb
+++ b/actionview/test/template/html_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class HTMLTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/javascript_helper_test.rb b/actionview/test/template/javascript_helper_test.rb
index 43ea8eacc6..67747a7a83 100644
--- a/actionview/test/template/javascript_helper_test.rb
+++ b/actionview/test/template/javascript_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class JavaScriptHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/log_subscriber_test.rb b/actionview/test/template/log_subscriber_test.rb
index 765f644bb4..4c9f84f277 100644
--- a/actionview/test/template/log_subscriber_test.rb
+++ b/actionview/test/template/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 require "action_view/log_subscriber"
diff --git a/actionview/test/template/lookup_context_test.rb b/actionview/test/template/lookup_context_test.rb
index b55f68e36b..b47d92df34 100644
--- a/actionview/test/template/lookup_context_test.rb
+++ b/actionview/test/template/lookup_context_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "abstract_controller/rendering"
 
diff --git a/actionview/test/template/number_helper_test.rb b/actionview/test/template/number_helper_test.rb
index 9077dbb0c8..678120a9c9 100644
--- a/actionview/test/template/number_helper_test.rb
+++ b/actionview/test/template/number_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class NumberHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/output_safety_helper_test.rb b/actionview/test/template/output_safety_helper_test.rb
index 3b4b83110c..537b4393ee 100644
--- a/actionview/test/template/output_safety_helper_test.rb
+++ b/actionview/test/template/output_safety_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class OutputSafetyHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/partial_iteration_test.rb b/actionview/test/template/partial_iteration_test.rb
index 3a31134e5b..3ebf3b550a 100644
--- a/actionview/test/template/partial_iteration_test.rb
+++ b/actionview/test/template/partial_iteration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_view/renderer/partial_renderer"
 
diff --git a/actionview/test/template/record_identifier_test.rb b/actionview/test/template/record_identifier_test.rb
index 529de9a57b..ce446715fd 100644
--- a/actionview/test/template/record_identifier_test.rb
+++ b/actionview/test/template/record_identifier_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionview/test/template/record_tag_helper_test.rb b/actionview/test/template/record_tag_helper_test.rb
index ab110d8314..3685230558 100644
--- a/actionview/test/template/record_tag_helper_test.rb
+++ b/actionview/test/template/record_tag_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class RecordTagPost
diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index 909aa81833..1fd8b4fe1a 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionview/test/template/resolver_cache_test.rb b/actionview/test/template/resolver_cache_test.rb
index b881618a1d..0ecfccd375 100644
--- a/actionview/test/template/resolver_cache_test.rb
+++ b/actionview/test/template/resolver_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ResolverCacheTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/resolver_patterns_test.rb b/actionview/test/template/resolver_patterns_test.rb
index f5a28be400..8e21f4b828 100644
--- a/actionview/test/template/resolver_patterns_test.rb
+++ b/actionview/test/template/resolver_patterns_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ResolverPatternsTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/sanitize_helper_test.rb b/actionview/test/template/sanitize_helper_test.rb
index 8ca8cb6d17..4d4ed3c35c 100644
--- a/actionview/test/template/sanitize_helper_test.rb
+++ b/actionview/test/template/sanitize_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 # The exhaustive tests are in the rails-html-sanitizer gem.
diff --git a/actionview/test/template/streaming_render_test.rb b/actionview/test/template/streaming_render_test.rb
index 835f101c00..41b9063417 100644
--- a/actionview/test/template/streaming_render_test.rb
+++ b/actionview/test/template/streaming_render_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestController < ActionController::Base
diff --git a/actionview/test/template/tag_helper_test.rb b/actionview/test/template/tag_helper_test.rb
index d338ff9d3f..f1e5946e14 100644
--- a/actionview/test/template/tag_helper_test.rb
+++ b/actionview/test/template/tag_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TagHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/template_error_test.rb b/actionview/test/template/template_error_test.rb
index a5201edfcf..54c1d53b60 100644
--- a/actionview/test/template/template_error_test.rb
+++ b/actionview/test/template/template_error_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TemplateErrorTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/template_test.rb b/actionview/test/template/template_test.rb
index 817e2e4315..dd131f0246 100644
--- a/actionview/test/template/template_test.rb
+++ b/actionview/test/template/template_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # encoding: US-ASCII
 require "abstract_unit"
 require "logger"
diff --git a/actionview/test/template/test_case_test.rb b/actionview/test/template/test_case_test.rb
index 4a8324b235..3deddd5706 100644
--- a/actionview/test/template/test_case_test.rb
+++ b/actionview/test/template/test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/engine"
 
diff --git a/actionview/test/template/test_test.rb b/actionview/test/template/test_test.rb
index ecc7a9a5a1..52cac77bc5 100644
--- a/actionview/test/template/test_test.rb
+++ b/actionview/test/template/test_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module PeopleHelper
diff --git a/actionview/test/template/testing/fixture_resolver_test.rb b/actionview/test/template/testing/fixture_resolver_test.rb
index 45b4e1b309..effe453fc0 100644
--- a/actionview/test/template/testing/fixture_resolver_test.rb
+++ b/actionview/test/template/testing/fixture_resolver_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class FixtureResolverTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/testing/null_resolver_test.rb b/actionview/test/template/testing/null_resolver_test.rb
index cc7a732d21..5346fd3368 100644
--- a/actionview/test/template/testing/null_resolver_test.rb
+++ b/actionview/test/template/testing/null_resolver_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class NullResolverTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/text_helper_test.rb b/actionview/test/template/text_helper_test.rb
index ae923980fa..21ee4cc8e5 100644
--- a/actionview/test/template/text_helper_test.rb
+++ b/actionview/test/template/text_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TextHelperTest < ActionView::TestCase
diff --git a/actionview/test/template/text_test.rb b/actionview/test/template/text_test.rb
index 4eb571eaa7..72ffd5f3be 100644
--- a/actionview/test/template/text_test.rb
+++ b/actionview/test/template/text_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TextTest < ActiveSupport::TestCase
diff --git a/actionview/test/template/translation_helper_test.rb b/actionview/test/template/translation_helper_test.rb
index f43e8b9a80..1cfc13f337 100644
--- a/actionview/test/template/translation_helper_test.rb
+++ b/actionview/test/template/translation_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module I18n
diff --git a/actionview/test/template/url_helper_test.rb b/actionview/test/template/url_helper_test.rb
index 24f9bbec79..a087c5c0cd 100644
--- a/actionview/test/template/url_helper_test.rb
+++ b/actionview/test/template/url_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class UrlHelperTest < ActiveSupport::TestCase
diff --git a/actionview/test/ujs/config.ru b/actionview/test/ujs/config.ru
index 87f37efe8b..213a41127a 100644
--- a/actionview/test/ujs/config.ru
+++ b/actionview/test/ujs/config.ru
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $LOAD_PATH.unshift __dir__
 require "server"
 
diff --git a/actionview/test/ujs/server.rb b/actionview/test/ujs/server.rb
index b31c6b896a..7deb208af0 100644
--- a/actionview/test/ujs/server.rb
+++ b/actionview/test/ujs/server.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack"
 require "rails"
 require "action_controller/railtie"
diff --git a/activejob/Rakefile b/activejob/Rakefile
index 5d0d22e88b..dd03ab0b8f 100644
--- a/activejob/Rakefile
+++ b/activejob/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 #TODO: add qu back to the list after it support Rails 5.1
diff --git a/activejob/activejob.gemspec b/activejob/activejob.gemspec
index d3fe7b45e7..bdf23223d1 100644
--- a/activejob/activejob.gemspec
+++ b/activejob/activejob.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/activejob/bin/test b/activejob/bin/test
index c53377cc97..470ce93f10 100755
--- a/activejob/bin/test
+++ b/activejob/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/activejob/lib/active_job.rb b/activejob/lib/active_job.rb
index c94903854a..8b7aef65a2 100644
--- a/activejob/lib/active_job.rb
+++ b/activejob/lib/active_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2014-2017 David Heinemeier Hansson
 #
diff --git a/activejob/lib/active_job/arguments.rb b/activejob/lib/active_job/arguments.rb
index dde7d7afa6..523a0e7f33 100644
--- a/activejob/lib/active_job/arguments.rb
+++ b/activejob/lib/active_job/arguments.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/base.rb b/activejob/lib/active_job/base.rb
index c4eec7ea78..18e8641e50 100644
--- a/activejob/lib/active_job/base.rb
+++ b/activejob/lib/active_job/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job/core"
 require "active_job/queue_adapter"
 require "active_job/queue_name"
diff --git a/activejob/lib/active_job/callbacks.rb b/activejob/lib/active_job/callbacks.rb
index ab225a93d3..9aebc880a5 100644
--- a/activejob/lib/active_job/callbacks.rb
+++ b/activejob/lib/active_job/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/callbacks"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/configured_job.rb b/activejob/lib/active_job/configured_job.rb
index 79c197d531..2ff31f2dae 100644
--- a/activejob/lib/active_job/configured_job.rb
+++ b/activejob/lib/active_job/configured_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   class ConfiguredJob #:nodoc:
     def initialize(job_class, options = {})
diff --git a/activejob/lib/active_job/core.rb b/activejob/lib/active_job/core.rb
index 7f1d4efc65..e3e63f227e 100644
--- a/activejob/lib/active_job/core.rb
+++ b/activejob/lib/active_job/core.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   # Provides general behavior that will be included into every Active Job
   # object that inherits from ActiveJob::Base.
diff --git a/activejob/lib/active_job/enqueuing.rb b/activejob/lib/active_job/enqueuing.rb
index d1dbc4539e..c73117e7f3 100644
--- a/activejob/lib/active_job/enqueuing.rb
+++ b/activejob/lib/active_job/enqueuing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job/arguments"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/exceptions.rb b/activejob/lib/active_job/exceptions.rb
index 3a91cbc0b6..c1b5d35313 100644
--- a/activejob/lib/active_job/exceptions.rb
+++ b/activejob/lib/active_job/exceptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/numeric/time"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/execution.rb b/activejob/lib/active_job/execution.rb
index ddffabe0ee..94d30c8eaf 100644
--- a/activejob/lib/active_job/execution.rb
+++ b/activejob/lib/active_job/execution.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/rescuable"
 require "active_job/arguments"
 
diff --git a/activejob/lib/active_job/gem_version.rb b/activejob/lib/active_job/gem_version.rb
index 0e414f1b11..bf81f37e81 100644
--- a/activejob/lib/active_job/gem_version.rb
+++ b/activejob/lib/active_job/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   # Returns the version of the currently loaded Active Job as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/activejob/lib/active_job/logging.rb b/activejob/lib/active_job/logging.rb
index 8f8f4cb244..ddc4915fd3 100644
--- a/activejob/lib/active_job/logging.rb
+++ b/activejob/lib/active_job/logging.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/string/filters"
 require "active_support/tagged_logging"
diff --git a/activejob/lib/active_job/queue_adapter.rb b/activejob/lib/active_job/queue_adapter.rb
index 8f4d40de19..b22d8b8347 100644
--- a/activejob/lib/active_job/queue_adapter.rb
+++ b/activejob/lib/active_job/queue_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/inflections"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters.rb b/activejob/lib/active_job/queue_adapters.rb
index b89a62319a..c8eedb6156 100644
--- a/activejob/lib/active_job/queue_adapters.rb
+++ b/activejob/lib/active_job/queue_adapters.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   # == Active Job adapters
   #
diff --git a/activejob/lib/active_job/queue_adapters/async_adapter.rb b/activejob/lib/active_job/queue_adapters/async_adapter.rb
index d2fc686339..e2bff9e646 100644
--- a/activejob/lib/active_job/queue_adapters/async_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/async_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 require "concurrent/scheduled_task"
 require "concurrent/executor/thread_pool_executor"
diff --git a/activejob/lib/active_job/queue_adapters/backburner_adapter.rb b/activejob/lib/active_job/queue_adapters/backburner_adapter.rb
index 63519df551..e3eccce62b 100644
--- a/activejob/lib/active_job/queue_adapters/backburner_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/backburner_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "backburner"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/delayed_job_adapter.rb b/activejob/lib/active_job/queue_adapters/delayed_job_adapter.rb
index 54a5af2ae6..83ad2e767d 100644
--- a/activejob/lib/active_job/queue_adapters/delayed_job_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/delayed_job_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "delayed_job"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/inline_adapter.rb b/activejob/lib/active_job/queue_adapters/inline_adapter.rb
index e793fff89d..0496f8449e 100644
--- a/activejob/lib/active_job/queue_adapters/inline_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/inline_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   module QueueAdapters
     # == Active Job Inline adapter
diff --git a/activejob/lib/active_job/queue_adapters/qu_adapter.rb b/activejob/lib/active_job/queue_adapters/qu_adapter.rb
index 9b2072f611..e8994533e4 100644
--- a/activejob/lib/active_job/queue_adapters/qu_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/qu_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "qu"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/que_adapter.rb b/activejob/lib/active_job/queue_adapters/que_adapter.rb
index e72899a1cb..0e698f0d79 100644
--- a/activejob/lib/active_job/queue_adapters/que_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/que_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "que"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb b/activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb
index 53fb0d83b4..1115eb88ae 100644
--- a/activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "queue_classic"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/resque_adapter.rb b/activejob/lib/active_job/queue_adapters/resque_adapter.rb
index f9cefd3c33..2df157ef89 100644
--- a/activejob/lib/active_job/queue_adapters/resque_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/resque_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "resque"
 require "active_support/core_ext/enumerable"
 require "active_support/core_ext/array/access"
diff --git a/activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb b/activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb
index 35f399b0f0..895cc1f981 100644
--- a/activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/sidekiq_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sidekiq"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/sneakers_adapter.rb b/activejob/lib/active_job/queue_adapters/sneakers_adapter.rb
index 972ff5af0f..f00acfc04a 100644
--- a/activejob/lib/active_job/queue_adapters/sneakers_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/sneakers_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sneakers"
 require "monitor"
 
diff --git a/activejob/lib/active_job/queue_adapters/sucker_punch_adapter.rb b/activejob/lib/active_job/queue_adapters/sucker_punch_adapter.rb
index 2ba9372f4f..dd59a79813 100644
--- a/activejob/lib/active_job/queue_adapters/sucker_punch_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/sucker_punch_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sucker_punch"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/queue_adapters/test_adapter.rb b/activejob/lib/active_job/queue_adapters/test_adapter.rb
index 5972b28156..1b633b210e 100644
--- a/activejob/lib/active_job/queue_adapters/test_adapter.rb
+++ b/activejob/lib/active_job/queue_adapters/test_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   module QueueAdapters
     # == Test adapter for Active Job
diff --git a/activejob/lib/active_job/queue_name.rb b/activejob/lib/active_job/queue_name.rb
index 22ebd5e3fc..6f521a1c1a 100644
--- a/activejob/lib/active_job/queue_name.rb
+++ b/activejob/lib/active_job/queue_name.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   module QueueName
     extend ActiveSupport::Concern
diff --git a/activejob/lib/active_job/queue_priority.rb b/activejob/lib/active_job/queue_priority.rb
index fd1c0f6286..399d7a135a 100644
--- a/activejob/lib/active_job/queue_priority.rb
+++ b/activejob/lib/active_job/queue_priority.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   module QueuePriority
     extend ActiveSupport::Concern
diff --git a/activejob/lib/active_job/railtie.rb b/activejob/lib/active_job/railtie.rb
index 8adbd3473c..4a8bf04d70 100644
--- a/activejob/lib/active_job/railtie.rb
+++ b/activejob/lib/active_job/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "global_id/railtie"
 require "active_job"
 
diff --git a/activejob/lib/active_job/test_case.rb b/activejob/lib/active_job/test_case.rb
index 028ff552bf..a5ec45e4a7 100644
--- a/activejob/lib/active_job/test_case.rb
+++ b/activejob/lib/active_job/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/test_case"
 
 module ActiveJob
diff --git a/activejob/lib/active_job/test_helper.rb b/activejob/lib/active_job/test_helper.rb
index 60ca1b5f1b..a61e4f59a5 100644
--- a/activejob/lib/active_job/test_helper.rb
+++ b/activejob/lib/active_job/test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/class/subclasses"
 require "active_support/core_ext/hash/keys"
 
diff --git a/activejob/lib/active_job/translation.rb b/activejob/lib/active_job/translation.rb
index 71c4cb24af..67e4cf4ab9 100644
--- a/activejob/lib/active_job/translation.rb
+++ b/activejob/lib/active_job/translation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveJob
   module Translation #:nodoc:
     extend ActiveSupport::Concern
diff --git a/activejob/lib/active_job/version.rb b/activejob/lib/active_job/version.rb
index afff4271d4..60b463817f 100644
--- a/activejob/lib/active_job/version.rb
+++ b/activejob/lib/active_job/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActiveJob
diff --git a/activejob/lib/rails/generators/job/job_generator.rb b/activejob/lib/rails/generators/job/job_generator.rb
index dce4e3a3fe..474f181f65 100644
--- a/activejob/lib/rails/generators/job/job_generator.rb
+++ b/activejob/lib/rails/generators/job/job_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module Rails # :nodoc:
diff --git a/activejob/test/adapters/async.rb b/activejob/test/adapters/async.rb
index d5a61d7684..08eb9658cd 100644
--- a/activejob/test/adapters/async.rb
+++ b/activejob/test/adapters/async.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 ActiveJob::Base.queue_adapter = :async
 ActiveJob::Base.queue_adapter.immediate = true
diff --git a/activejob/test/adapters/backburner.rb b/activejob/test/adapters/backburner.rb
index cfc97432f2..17ba07b802 100644
--- a/activejob/test/adapters/backburner.rb
+++ b/activejob/test/adapters/backburner.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "support/backburner/inline"
 
 ActiveJob::Base.queue_adapter = :backburner
diff --git a/activejob/test/adapters/delayed_job.rb b/activejob/test/adapters/delayed_job.rb
index 3aa646555a..98e41c0c36 100644
--- a/activejob/test/adapters/delayed_job.rb
+++ b/activejob/test/adapters/delayed_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveJob::Base.queue_adapter = :delayed_job
 
 $LOAD_PATH << File.expand_path("../support/delayed_job", __dir__)
diff --git a/activejob/test/adapters/inline.rb b/activejob/test/adapters/inline.rb
index ec3f0940e6..24113dfa5a 100644
--- a/activejob/test/adapters/inline.rb
+++ b/activejob/test/adapters/inline.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 ActiveJob::Base.queue_adapter = :inline
diff --git a/activejob/test/adapters/qu.rb b/activejob/test/adapters/qu.rb
index f8e7eb624d..b89c504091 100644
--- a/activejob/test/adapters/qu.rb
+++ b/activejob/test/adapters/qu.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "qu-immediate"
 
 ActiveJob::Base.queue_adapter = :qu
diff --git a/activejob/test/adapters/que.rb b/activejob/test/adapters/que.rb
index 0d27bb8fc9..0c49274a4e 100644
--- a/activejob/test/adapters/que.rb
+++ b/activejob/test/adapters/que.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "support/que/inline"
 
 ActiveJob::Base.queue_adapter = :que
diff --git a/activejob/test/adapters/queue_classic.rb b/activejob/test/adapters/queue_classic.rb
index f57057c914..e301a7ca96 100644
--- a/activejob/test/adapters/queue_classic.rb
+++ b/activejob/test/adapters/queue_classic.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "support/queue_classic/inline"
 ActiveJob::Base.queue_adapter = :queue_classic
diff --git a/activejob/test/adapters/resque.rb b/activejob/test/adapters/resque.rb
index 6c732c1e33..af7080358d 100644
--- a/activejob/test/adapters/resque.rb
+++ b/activejob/test/adapters/resque.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 ActiveJob::Base.queue_adapter = :resque
 Resque.inline = true
diff --git a/activejob/test/adapters/sidekiq.rb b/activejob/test/adapters/sidekiq.rb
index 6cc64e7684..8036331ef1 100644
--- a/activejob/test/adapters/sidekiq.rb
+++ b/activejob/test/adapters/sidekiq.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "sidekiq/testing/inline"
 ActiveJob::Base.queue_adapter = :sidekiq
diff --git a/activejob/test/adapters/sneakers.rb b/activejob/test/adapters/sneakers.rb
index 85f6b74144..159c0d1906 100644
--- a/activejob/test/adapters/sneakers.rb
+++ b/activejob/test/adapters/sneakers.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "support/sneakers/inline"
 ActiveJob::Base.queue_adapter = :sneakers
diff --git a/activejob/test/adapters/sucker_punch.rb b/activejob/test/adapters/sucker_punch.rb
index 45b5fa1db2..5661b6ee92 100644
--- a/activejob/test/adapters/sucker_punch.rb
+++ b/activejob/test/adapters/sucker_punch.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "sucker_punch/testing/inline"
 ActiveJob::Base.queue_adapter = :sucker_punch
diff --git a/activejob/test/adapters/test.rb b/activejob/test/adapters/test.rb
index 965f7e91a2..7180b38a57 100644
--- a/activejob/test/adapters/test.rb
+++ b/activejob/test/adapters/test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveJob::Base.queue_adapter = :test
 ActiveJob::Base.queue_adapter.perform_enqueued_jobs = true
 ActiveJob::Base.queue_adapter.perform_enqueued_at_jobs = true
diff --git a/activejob/test/cases/adapter_test.rb b/activejob/test/cases/adapter_test.rb
index 764ce3ccbc..caf5d44a5e 100644
--- a/activejob/test/cases/adapter_test.rb
+++ b/activejob/test/cases/adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 
 class AdapterTest < ActiveSupport::TestCase
diff --git a/activejob/test/cases/argument_serialization_test.rb b/activejob/test/cases/argument_serialization_test.rb
index ebd9a4fe41..7934d8e556 100644
--- a/activejob/test/cases/argument_serialization_test.rb
+++ b/activejob/test/cases/argument_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "active_job/arguments"
 require "models/person"
diff --git a/activejob/test/cases/callbacks_test.rb b/activejob/test/cases/callbacks_test.rb
index fbca367ae9..8d1c9c3058 100644
--- a/activejob/test/cases/callbacks_test.rb
+++ b/activejob/test/cases/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/callback_job"
 
diff --git a/activejob/test/cases/exceptions_test.rb b/activejob/test/cases/exceptions_test.rb
index 5f56d47e8e..dbe55f7430 100644
--- a/activejob/test/cases/exceptions_test.rb
+++ b/activejob/test/cases/exceptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/retry_job"
 
diff --git a/activejob/test/cases/job_serialization_test.rb b/activejob/test/cases/job_serialization_test.rb
index fa8d98ddca..c737557ece 100644
--- a/activejob/test/cases/job_serialization_test.rb
+++ b/activejob/test/cases/job_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/gid_job"
 require "jobs/hello_job"
diff --git a/activejob/test/cases/logging_test.rb b/activejob/test/cases/logging_test.rb
index 117d9b23a3..d5ca0f385c 100644
--- a/activejob/test/cases/logging_test.rb
+++ b/activejob/test/cases/logging_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "active_support/log_subscriber/test_helper"
 require "active_support/core_ext/numeric/time"
diff --git a/activejob/test/cases/queue_adapter_test.rb b/activejob/test/cases/queue_adapter_test.rb
index 6061fb2127..8368107bdf 100644
--- a/activejob/test/cases/queue_adapter_test.rb
+++ b/activejob/test/cases/queue_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 
 module ActiveJob
diff --git a/activejob/test/cases/queue_naming_test.rb b/activejob/test/cases/queue_naming_test.rb
index 8ba4324c46..0247bc111e 100644
--- a/activejob/test/cases/queue_naming_test.rb
+++ b/activejob/test/cases/queue_naming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/hello_job"
 require "jobs/logging_job"
diff --git a/activejob/test/cases/queue_priority_test.rb b/activejob/test/cases/queue_priority_test.rb
index 416498c270..171fb1e593 100644
--- a/activejob/test/cases/queue_priority_test.rb
+++ b/activejob/test/cases/queue_priority_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/hello_job"
 
diff --git a/activejob/test/cases/queuing_test.rb b/activejob/test/cases/queuing_test.rb
index 44f674a2ee..a3ecb15c31 100644
--- a/activejob/test/cases/queuing_test.rb
+++ b/activejob/test/cases/queuing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/hello_job"
 require "active_support/core_ext/numeric/time"
diff --git a/activejob/test/cases/rescue_test.rb b/activejob/test/cases/rescue_test.rb
index c2a991cb2d..afb1b48831 100644
--- a/activejob/test/cases/rescue_test.rb
+++ b/activejob/test/cases/rescue_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/rescue_job"
 require "models/person"
diff --git a/activejob/test/cases/test_case_test.rb b/activejob/test/cases/test_case_test.rb
index eb320a98d1..3db2d9dec7 100644
--- a/activejob/test/cases/test_case_test.rb
+++ b/activejob/test/cases/test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/hello_job"
 require "jobs/logging_job"
diff --git a/activejob/test/cases/test_helper_test.rb b/activejob/test/cases/test_helper_test.rb
index 0f8174663e..81e75b4374 100644
--- a/activejob/test/cases/test_helper_test.rb
+++ b/activejob/test/cases/test_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "active_support/core_ext/time"
 require "active_support/core_ext/date"
diff --git a/activejob/test/cases/translation_test.rb b/activejob/test/cases/translation_test.rb
index d6782a38bd..27bfd50985 100644
--- a/activejob/test/cases/translation_test.rb
+++ b/activejob/test/cases/translation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/translated_hello_job"
 
diff --git a/activejob/test/helper.rb b/activejob/test/helper.rb
index edcf159056..db07ecab7a 100644
--- a/activejob/test/helper.rb
+++ b/activejob/test/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_job"
 require "support/job_buffer"
 
diff --git a/activejob/test/integration/queuing_test.rb b/activejob/test/integration/queuing_test.rb
index 72c66d111f..2669c52a1c 100644
--- a/activejob/test/integration/queuing_test.rb
+++ b/activejob/test/integration/queuing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "helper"
 require "jobs/logging_job"
 require "jobs/hello_job"
diff --git a/activejob/test/jobs/application_job.rb b/activejob/test/jobs/application_job.rb
index 32fe70b8e4..a009ace51c 100644
--- a/activejob/test/jobs/application_job.rb
+++ b/activejob/test/jobs/application_job.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ApplicationJob < ActiveJob::Base
 end
diff --git a/activejob/test/jobs/callback_job.rb b/activejob/test/jobs/callback_job.rb
index 7c5b161437..ca2a8e031a 100644
--- a/activejob/test/jobs/callback_job.rb
+++ b/activejob/test/jobs/callback_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CallbackJob < ActiveJob::Base
   before_perform ->(job) { job.history << "CallbackJob ran before_perform" }
   after_perform ->(job) { job.history << "CallbackJob ran after_perform" }
diff --git a/activejob/test/jobs/gid_job.rb b/activejob/test/jobs/gid_job.rb
index c43e25a796..c7cfa6e7a2 100644
--- a/activejob/test/jobs/gid_job.rb
+++ b/activejob/test/jobs/gid_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class GidJob < ActiveJob::Base
diff --git a/activejob/test/jobs/hello_job.rb b/activejob/test/jobs/hello_job.rb
index 79e1d6a6f4..126fefae00 100644
--- a/activejob/test/jobs/hello_job.rb
+++ b/activejob/test/jobs/hello_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class HelloJob < ActiveJob::Base
diff --git a/activejob/test/jobs/inherited_job.rb b/activejob/test/jobs/inherited_job.rb
index 58b6582154..60fca66f88 100644
--- a/activejob/test/jobs/inherited_job.rb
+++ b/activejob/test/jobs/inherited_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "application_job"
 
 class InheritedJob < ApplicationJob
diff --git a/activejob/test/jobs/kwargs_job.rb b/activejob/test/jobs/kwargs_job.rb
index ccd9811595..9f9d809673 100644
--- a/activejob/test/jobs/kwargs_job.rb
+++ b/activejob/test/jobs/kwargs_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class KwargsJob < ActiveJob::Base
diff --git a/activejob/test/jobs/logging_job.rb b/activejob/test/jobs/logging_job.rb
index 1a47601fde..119b32fa67 100644
--- a/activejob/test/jobs/logging_job.rb
+++ b/activejob/test/jobs/logging_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class LoggingJob < ActiveJob::Base
   def perform(dummy)
     logger.info "Dummy, here is it: #{dummy}"
diff --git a/activejob/test/jobs/nested_job.rb b/activejob/test/jobs/nested_job.rb
index 891a2f952e..21b7692cd1 100644
--- a/activejob/test/jobs/nested_job.rb
+++ b/activejob/test/jobs/nested_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class NestedJob < ActiveJob::Base
   def perform
     LoggingJob.perform_later "NestedJob"
diff --git a/activejob/test/jobs/overridden_logging_job.rb b/activejob/test/jobs/overridden_logging_job.rb
index 808d6e30e6..2b17a65142 100644
--- a/activejob/test/jobs/overridden_logging_job.rb
+++ b/activejob/test/jobs/overridden_logging_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class OverriddenLoggingJob < ActiveJob::Base
   def perform(dummy)
     logger.info "Dummy, here is it: #{dummy}"
diff --git a/activejob/test/jobs/provider_jid_job.rb b/activejob/test/jobs/provider_jid_job.rb
index 71ed23e9bb..0c8ba040f5 100644
--- a/activejob/test/jobs/provider_jid_job.rb
+++ b/activejob/test/jobs/provider_jid_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class ProviderJidJob < ActiveJob::Base
diff --git a/activejob/test/jobs/queue_adapter_job.rb b/activejob/test/jobs/queue_adapter_job.rb
index 7058ab2087..160dfd74ec 100644
--- a/activejob/test/jobs/queue_adapter_job.rb
+++ b/activejob/test/jobs/queue_adapter_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class QueueAdapterJob < ActiveJob::Base
   self.queue_adapter = :inline
 end
diff --git a/activejob/test/jobs/queue_as_job.rb b/activejob/test/jobs/queue_as_job.rb
index ab3075aa77..7dc318e736 100644
--- a/activejob/test/jobs/queue_as_job.rb
+++ b/activejob/test/jobs/queue_as_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class QueueAsJob < ActiveJob::Base
diff --git a/activejob/test/jobs/rescue_job.rb b/activejob/test/jobs/rescue_job.rb
index fd78820bfe..62add4271a 100644
--- a/activejob/test/jobs/rescue_job.rb
+++ b/activejob/test/jobs/rescue_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class RescueJob < ActiveJob::Base
diff --git a/activejob/test/jobs/retry_job.rb b/activejob/test/jobs/retry_job.rb
index b121296441..c02febc50c 100644
--- a/activejob/test/jobs/retry_job.rb
+++ b/activejob/test/jobs/retry_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 require "active_support/core_ext/integer/inflections"
 
diff --git a/activejob/test/jobs/translated_hello_job.rb b/activejob/test/jobs/translated_hello_job.rb
index 67ddca2f41..56e9f147b9 100644
--- a/activejob/test/jobs/translated_hello_job.rb
+++ b/activejob/test/jobs/translated_hello_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "../support/job_buffer"
 
 class TranslatedHelloJob < ActiveJob::Base
diff --git a/activejob/test/models/person.rb b/activejob/test/models/person.rb
index bcd1018782..b5d68ad9c1 100644
--- a/activejob/test/models/person.rb
+++ b/activejob/test/models/person.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Person
   class RecordNotFound < StandardError; end
 
diff --git a/activejob/test/support/backburner/inline.rb b/activejob/test/support/backburner/inline.rb
index 304f9c781c..9758332b6f 100644
--- a/activejob/test/support/backburner/inline.rb
+++ b/activejob/test/support/backburner/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "backburner"
 
 Backburner::Worker.class_eval do
diff --git a/activejob/test/support/delayed_job/delayed/backend/test.rb b/activejob/test/support/delayed_job/delayed/backend/test.rb
index ed3b252042..68288c062b 100644
--- a/activejob/test/support/delayed_job/delayed/backend/test.rb
+++ b/activejob/test/support/delayed_job/delayed/backend/test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #copied from https://github.com/collectiveidea/delayed_job/blob/master/spec/delayed/backend/test.rb
 require "ostruct"
 
diff --git a/activejob/test/support/integration/adapters/async.rb b/activejob/test/support/integration/adapters/async.rb
index 19aea8472e..44ab98437a 100644
--- a/activejob/test/support/integration/adapters/async.rb
+++ b/activejob/test/support/integration/adapters/async.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module AsyncJobsManager
   def setup
     ActiveJob::Base.queue_adapter = :async
diff --git a/activejob/test/support/integration/adapters/backburner.rb b/activejob/test/support/integration/adapters/backburner.rb
index fd1e7697c5..2e194933a1 100644
--- a/activejob/test/support/integration/adapters/backburner.rb
+++ b/activejob/test/support/integration/adapters/backburner.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module BackburnerJobsManager
   def setup
     ActiveJob::Base.queue_adapter = :backburner
diff --git a/activejob/test/support/integration/adapters/delayed_job.rb b/activejob/test/support/integration/adapters/delayed_job.rb
index 73e1a04e45..2adbbcd88f 100644
--- a/activejob/test/support/integration/adapters/delayed_job.rb
+++ b/activejob/test/support/integration/adapters/delayed_job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "delayed_job"
 require "delayed_job_active_record"
 
diff --git a/activejob/test/support/integration/adapters/inline.rb b/activejob/test/support/integration/adapters/inline.rb
index c669793dba..e06b34c976 100644
--- a/activejob/test/support/integration/adapters/inline.rb
+++ b/activejob/test/support/integration/adapters/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module InlineJobsManager
   def setup
     ActiveJob::Base.queue_adapter = :inline
diff --git a/activejob/test/support/integration/adapters/qu.rb b/activejob/test/support/integration/adapters/qu.rb
index b2f63d8f94..71819f5a55 100644
--- a/activejob/test/support/integration/adapters/qu.rb
+++ b/activejob/test/support/integration/adapters/qu.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module QuJobsManager
   def setup
     require "qu-rails"
diff --git a/activejob/test/support/integration/adapters/que.rb b/activejob/test/support/integration/adapters/que.rb
index cf1160d2bc..20faee3427 100644
--- a/activejob/test/support/integration/adapters/que.rb
+++ b/activejob/test/support/integration/adapters/que.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module QueJobsManager
   def setup
     require "sequel"
diff --git a/activejob/test/support/integration/adapters/queue_classic.rb b/activejob/test/support/integration/adapters/queue_classic.rb
index 7f1308c5d3..369693e947 100644
--- a/activejob/test/support/integration/adapters/queue_classic.rb
+++ b/activejob/test/support/integration/adapters/queue_classic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module QueueClassicJobsManager
   def setup
     ENV["QC_DATABASE_URL"] ||= "postgres:///active_jobs_qc_int_test"
diff --git a/activejob/test/support/integration/adapters/resque.rb b/activejob/test/support/integration/adapters/resque.rb
index ef2dd75687..a21a1786c9 100644
--- a/activejob/test/support/integration/adapters/resque.rb
+++ b/activejob/test/support/integration/adapters/resque.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ResqueJobsManager
   def setup
     ActiveJob::Base.queue_adapter = :resque
diff --git a/activejob/test/support/integration/adapters/sidekiq.rb b/activejob/test/support/integration/adapters/sidekiq.rb
index 8c90410e76..bbb575f6da 100644
--- a/activejob/test/support/integration/adapters/sidekiq.rb
+++ b/activejob/test/support/integration/adapters/sidekiq.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sidekiq/api"
 
 require "sidekiq/testing"
diff --git a/activejob/test/support/integration/adapters/sneakers.rb b/activejob/test/support/integration/adapters/sneakers.rb
index dc42501ff3..1c8dfaca59 100644
--- a/activejob/test/support/integration/adapters/sneakers.rb
+++ b/activejob/test/support/integration/adapters/sneakers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sneakers/runner"
 require "sneakers/publisher"
 require "timeout"
diff --git a/activejob/test/support/integration/adapters/sucker_punch.rb b/activejob/test/support/integration/adapters/sucker_punch.rb
index e528f24261..9c0d66b469 100644
--- a/activejob/test/support/integration/adapters/sucker_punch.rb
+++ b/activejob/test/support/integration/adapters/sucker_punch.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module SuckerPunchJobsManager
   def setup
     ActiveJob::Base.queue_adapter = :sucker_punch
diff --git a/activejob/test/support/integration/dummy_app_template.rb b/activejob/test/support/integration/dummy_app_template.rb
index a054ecea08..14fe3c9adc 100644
--- a/activejob/test/support/integration/dummy_app_template.rb
+++ b/activejob/test/support/integration/dummy_app_template.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 if ENV["AJ_ADAPTER"] == "delayed_job"
   generate "delayed_job:active_record", "--quiet"
 end
diff --git a/activejob/test/support/integration/helper.rb b/activejob/test/support/integration/helper.rb
index c0aa14c4c2..545b62752e 100644
--- a/activejob/test/support/integration/helper.rb
+++ b/activejob/test/support/integration/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 puts "\n\n*** rake aj:integration:#{ENV['AJ_ADAPTER']} ***\n"
 
 ENV["RAILS_ENV"] = "test"
diff --git a/activejob/test/support/integration/jobs_manager.rb b/activejob/test/support/integration/jobs_manager.rb
index 1cfbd60dc4..488756437b 100644
--- a/activejob/test/support/integration/jobs_manager.rb
+++ b/activejob/test/support/integration/jobs_manager.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class JobsManager
   @@managers = {}
   attr :adapter_name
diff --git a/activejob/test/support/integration/test_case_helpers.rb b/activejob/test/support/integration/test_case_helpers.rb
index add719187c..41bf9c89d1 100644
--- a/activejob/test/support/integration/test_case_helpers.rb
+++ b/activejob/test/support/integration/test_case_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/inflections"
 require "support/integration/jobs_manager"
 
diff --git a/activejob/test/support/job_buffer.rb b/activejob/test/support/job_buffer.rb
index 3146d06d54..620cb5288d 100644
--- a/activejob/test/support/job_buffer.rb
+++ b/activejob/test/support/job_buffer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module JobBuffer
   class << self
     def clear
diff --git a/activejob/test/support/que/inline.rb b/activejob/test/support/que/inline.rb
index e204f8154a..55eb0d01ef 100644
--- a/activejob/test/support/que/inline.rb
+++ b/activejob/test/support/que/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "que"
 
 Que::Job.class_eval do
diff --git a/activejob/test/support/queue_classic/inline.rb b/activejob/test/support/queue_classic/inline.rb
index 955469e5a8..dcd834ecce 100644
--- a/activejob/test/support/queue_classic/inline.rb
+++ b/activejob/test/support/queue_classic/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "queue_classic"
 
 module QC
diff --git a/activejob/test/support/sneakers/inline.rb b/activejob/test/support/sneakers/inline.rb
index 46882870d5..cf102ae5c2 100644
--- a/activejob/test/support/sneakers/inline.rb
+++ b/activejob/test/support/sneakers/inline.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sneakers"
 
 module Sneakers
diff --git a/activemodel/Rakefile b/activemodel/Rakefile
index 8027b46d54..d60f6d9997 100644
--- a/activemodel/Rakefile
+++ b/activemodel/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 task default: :test
diff --git a/activemodel/activemodel.gemspec b/activemodel/activemodel.gemspec
index 9ea6796081..18a35678f1 100644
--- a/activemodel/activemodel.gemspec
+++ b/activemodel/activemodel.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/activemodel/bin/test b/activemodel/bin/test
index c53377cc97..470ce93f10 100755
--- a/activemodel/bin/test
+++ b/activemodel/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb
index 1f090bad17..a2892e9ea9 100644
--- a/activemodel/lib/active_model.rb
+++ b/activemodel/lib/active_model.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb
index c87fd64a10..b3b39bf7ae 100644
--- a/activemodel/lib/active_model/attribute_methods.rb
+++ b/activemodel/lib/active_model/attribute_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "mutex_m"
 
diff --git a/activemodel/lib/active_model/callbacks.rb b/activemodel/lib/active_model/callbacks.rb
index 3bc2fed7cf..835e6f7716 100644
--- a/activemodel/lib/active_model/callbacks.rb
+++ b/activemodel/lib/active_model/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/conversion.rb b/activemodel/lib/active_model/conversion.rb
index fc0c499f14..12687c70d3 100644
--- a/activemodel/lib/active_model/conversion.rb
+++ b/activemodel/lib/active_model/conversion.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # == Active \Model \Conversion
   #
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 4dfa312223..dc81f74779 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/hash_with_indifferent_access"
 require "active_support/core_ext/object/duplicable"
 
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 52e1a46bfc..942b4fa9bb 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/conversions"
 require "active_support/core_ext/string/inflections"
 require "active_support/core_ext/object/deep_dup"
diff --git a/activemodel/lib/active_model/forbidden_attributes_protection.rb b/activemodel/lib/active_model/forbidden_attributes_protection.rb
index 37a16863d7..45ab8a2ca1 100644
--- a/activemodel/lib/active_model/forbidden_attributes_protection.rb
+++ b/activemodel/lib/active_model/forbidden_attributes_protection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # Raised when forbidden attributes are used for mass assignment.
   #
diff --git a/activemodel/lib/active_model/gem_version.rb b/activemodel/lib/active_model/gem_version.rb
index e257b0de71..67bdfaa643 100644
--- a/activemodel/lib/active_model/gem_version.rb
+++ b/activemodel/lib/active_model/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # Returns the version of the currently loaded \Active \Model as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/activemodel/lib/active_model/lint.rb b/activemodel/lib/active_model/lint.rb
index 4120d769c9..291a545528 100644
--- a/activemodel/lib/active_model/lint.rb
+++ b/activemodel/lib/active_model/lint.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Lint
     # == Active \Model \Lint \Tests
diff --git a/activemodel/lib/active_model/model.rb b/activemodel/lib/active_model/model.rb
index 234e479b35..945a5402a3 100644
--- a/activemodel/lib/active_model/model.rb
+++ b/activemodel/lib/active_model/model.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # == Active \Model \Basic \Model
   #
diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb
index b32c90884e..9ac56526a2 100644
--- a/activemodel/lib/active_model/naming.rb
+++ b/activemodel/lib/active_model/naming.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/module/introspection"
 require "active_support/core_ext/module/remove_method"
diff --git a/activemodel/lib/active_model/railtie.rb b/activemodel/lib/active_model/railtie.rb
index f7666d201a..1671eb7bd4 100644
--- a/activemodel/lib/active_model/railtie.rb
+++ b/activemodel/lib/active_model/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model"
 require "rails"
 
diff --git a/activemodel/lib/active_model/secure_password.rb b/activemodel/lib/active_model/secure_password.rb
index d1dc833f83..1c0fe92bc0 100644
--- a/activemodel/lib/active_model/secure_password.rb
+++ b/activemodel/lib/active_model/secure_password.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module SecurePassword
     extend ActiveSupport::Concern
diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb
index 3151c46828..77834f26fc 100644
--- a/activemodel/lib/active_model/serialization.rb
+++ b/activemodel/lib/active_model/serialization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/hash/slice"
 
diff --git a/activemodel/lib/active_model/serializers/json.rb b/activemodel/lib/active_model/serializers/json.rb
index 3d453cd829..205b84ddb4 100644
--- a/activemodel/lib/active_model/serializers/json.rb
+++ b/activemodel/lib/active_model/serializers/json.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/json"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/translation.rb b/activemodel/lib/active_model/translation.rb
index 7d8fe1717c..35fc7cf743 100644
--- a/activemodel/lib/active_model/translation.rb
+++ b/activemodel/lib/active_model/translation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # == Active \Model \Translation
   #
diff --git a/activemodel/lib/active_model/type.rb b/activemodel/lib/active_model/type.rb
index 3d8c0a00ce..095801d8f0 100644
--- a/activemodel/lib/active_model/type.rb
+++ b/activemodel/lib/active_model/type.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type/helpers"
 require "active_model/type/value"
 
diff --git a/activemodel/lib/active_model/type/big_integer.rb b/activemodel/lib/active_model/type/big_integer.rb
index 90734cb2fa..3b629682fe 100644
--- a/activemodel/lib/active_model/type/big_integer.rb
+++ b/activemodel/lib/active_model/type/big_integer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type/integer"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/type/binary.rb b/activemodel/lib/active_model/type/binary.rb
index 37da9deb43..819e4e4a96 100644
--- a/activemodel/lib/active_model/type/binary.rb
+++ b/activemodel/lib/active_model/type/binary.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Binary < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/boolean.rb b/activemodel/lib/active_model/type/boolean.rb
index 120aca8c6a..f2a47370a3 100644
--- a/activemodel/lib/active_model/type/boolean.rb
+++ b/activemodel/lib/active_model/type/boolean.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     # == Active \Model \Type \Boolean
diff --git a/activemodel/lib/active_model/type/date.rb b/activemodel/lib/active_model/type/date.rb
index e17fe1047a..eefd080351 100644
--- a/activemodel/lib/active_model/type/date.rb
+++ b/activemodel/lib/active_model/type/date.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Date < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/date_time.rb b/activemodel/lib/active_model/type/date_time.rb
index 325ab13375..5cb0077e45 100644
--- a/activemodel/lib/active_model/type/date_time.rb
+++ b/activemodel/lib/active_model/type/date_time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class DateTime < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/decimal.rb b/activemodel/lib/active_model/type/decimal.rb
index 388d41e7ff..e6805c5f6b 100644
--- a/activemodel/lib/active_model/type/decimal.rb
+++ b/activemodel/lib/active_model/type/decimal.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "bigdecimal/util"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/type/float.rb b/activemodel/lib/active_model/type/float.rb
index 00cef09cca..4d0d2771a0 100644
--- a/activemodel/lib/active_model/type/float.rb
+++ b/activemodel/lib/active_model/type/float.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Float < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/helpers.rb b/activemodel/lib/active_model/type/helpers.rb
index 3d039b7530..82cd9ebe98 100644
--- a/activemodel/lib/active_model/type/helpers.rb
+++ b/activemodel/lib/active_model/type/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type/helpers/accepts_multiparameter_time"
 require "active_model/type/helpers/numeric"
 require "active_model/type/helpers/mutable"
diff --git a/activemodel/lib/active_model/type/helpers/accepts_multiparameter_time.rb b/activemodel/lib/active_model/type/helpers/accepts_multiparameter_time.rb
index 69405f8e0a..f783d286c5 100644
--- a/activemodel/lib/active_model/type/helpers/accepts_multiparameter_time.rb
+++ b/activemodel/lib/active_model/type/helpers/accepts_multiparameter_time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     module Helpers # :nodoc: all
diff --git a/activemodel/lib/active_model/type/helpers/mutable.rb b/activemodel/lib/active_model/type/helpers/mutable.rb
index 61569f1e7b..f3a17a1698 100644
--- a/activemodel/lib/active_model/type/helpers/mutable.rb
+++ b/activemodel/lib/active_model/type/helpers/mutable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     module Helpers # :nodoc: all
diff --git a/activemodel/lib/active_model/type/helpers/numeric.rb b/activemodel/lib/active_model/type/helpers/numeric.rb
index 363115632f..275822b738 100644
--- a/activemodel/lib/active_model/type/helpers/numeric.rb
+++ b/activemodel/lib/active_model/type/helpers/numeric.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     module Helpers # :nodoc: all
diff --git a/activemodel/lib/active_model/type/helpers/time_value.rb b/activemodel/lib/active_model/type/helpers/time_value.rb
index c99addc642..53cf7c6029 100644
--- a/activemodel/lib/active_model/type/helpers/time_value.rb
+++ b/activemodel/lib/active_model/type/helpers/time_value.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/time/zones"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/type/immutable_string.rb b/activemodel/lib/active_model/type/immutable_string.rb
index 06abd8a13f..58268540e5 100644
--- a/activemodel/lib/active_model/type/immutable_string.rb
+++ b/activemodel/lib/active_model/type/immutable_string.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class ImmutableString < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/integer.rb b/activemodel/lib/active_model/type/integer.rb
index 0cd0e7f371..106b5d966c 100644
--- a/activemodel/lib/active_model/type/integer.rb
+++ b/activemodel/lib/active_model/type/integer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Integer < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/registry.rb b/activemodel/lib/active_model/type/registry.rb
index 15732d1bbd..2d5dd366eb 100644
--- a/activemodel/lib/active_model/type/registry.rb
+++ b/activemodel/lib/active_model/type/registry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   # :stopdoc:
   module Type
diff --git a/activemodel/lib/active_model/type/string.rb b/activemodel/lib/active_model/type/string.rb
index d6e330bdba..850cab962b 100644
--- a/activemodel/lib/active_model/type/string.rb
+++ b/activemodel/lib/active_model/type/string.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type/immutable_string"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/type/time.rb b/activemodel/lib/active_model/type/time.rb
index 8cf7078ff3..54d6214e81 100644
--- a/activemodel/lib/active_model/type/time.rb
+++ b/activemodel/lib/active_model/type/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Time < Value # :nodoc:
diff --git a/activemodel/lib/active_model/type/value.rb b/activemodel/lib/active_model/type/value.rb
index b56c8b48f5..7e9ae92245 100644
--- a/activemodel/lib/active_model/type/value.rb
+++ b/activemodel/lib/active_model/type/value.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Type
     class Value
diff --git a/activemodel/lib/active_model/validations.rb b/activemodel/lib/active_model/validations.rb
index a684277127..ae1d69f685 100644
--- a/activemodel/lib/active_model/validations.rb
+++ b/activemodel/lib/active_model/validations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/hash/except"
diff --git a/activemodel/lib/active_model/validations/absence.rb b/activemodel/lib/active_model/validations/absence.rb
index f09f89bff2..4618f46e30 100644
--- a/activemodel/lib/active_model/validations/absence.rb
+++ b/activemodel/lib/active_model/validations/absence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     # == \Active \Model Absence Validator
diff --git a/activemodel/lib/active_model/validations/acceptance.rb b/activemodel/lib/active_model/validations/acceptance.rb
index 32b8d9567e..a26c37daa5 100644
--- a/activemodel/lib/active_model/validations/acceptance.rb
+++ b/activemodel/lib/active_model/validations/acceptance.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class AcceptanceValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/callbacks.rb b/activemodel/lib/active_model/validations/callbacks.rb
index f4e10ce918..4e94422cf1 100644
--- a/activemodel/lib/active_model/validations/callbacks.rb
+++ b/activemodel/lib/active_model/validations/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     # == Active \Model \Validation \Callbacks
diff --git a/activemodel/lib/active_model/validations/clusivity.rb b/activemodel/lib/active_model/validations/clusivity.rb
index 081c69a7f7..18f1056e2b 100644
--- a/activemodel/lib/active_model/validations/clusivity.rb
+++ b/activemodel/lib/active_model/validations/clusivity.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/range"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validations/confirmation.rb b/activemodel/lib/active_model/validations/confirmation.rb
index 88930ea0cd..03585bf5e1 100644
--- a/activemodel/lib/active_model/validations/confirmation.rb
+++ b/activemodel/lib/active_model/validations/confirmation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class ConfirmationValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/exclusion.rb b/activemodel/lib/active_model/validations/exclusion.rb
index 1442f89002..b7156ba802 100644
--- a/activemodel/lib/active_model/validations/exclusion.rb
+++ b/activemodel/lib/active_model/validations/exclusion.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/validations/clusivity"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validations/format.rb b/activemodel/lib/active_model/validations/format.rb
index 01ea49c4d6..98b3f6a8e5 100644
--- a/activemodel/lib/active_model/validations/format.rb
+++ b/activemodel/lib/active_model/validations/format.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class FormatValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/helper_methods.rb b/activemodel/lib/active_model/validations/helper_methods.rb
index 14236dcf41..2176115334 100644
--- a/activemodel/lib/active_model/validations/helper_methods.rb
+++ b/activemodel/lib/active_model/validations/helper_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     module HelperMethods # :nodoc:
diff --git a/activemodel/lib/active_model/validations/inclusion.rb b/activemodel/lib/active_model/validations/inclusion.rb
index 7ca8696951..c6c5bae649 100644
--- a/activemodel/lib/active_model/validations/inclusion.rb
+++ b/activemodel/lib/active_model/validations/inclusion.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/validations/clusivity"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validations/length.rb b/activemodel/lib/active_model/validations/length.rb
index e77a9e4f4c..940c58f3a7 100644
--- a/activemodel/lib/active_model/validations/length.rb
+++ b/activemodel/lib/active_model/validations/length.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class LengthValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/numericality.rb b/activemodel/lib/active_model/validations/numericality.rb
index 53a7287ec6..fb053a4c4e 100644
--- a/activemodel/lib/active_model/validations/numericality.rb
+++ b/activemodel/lib/active_model/validations/numericality.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class NumericalityValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/presence.rb b/activemodel/lib/active_model/validations/presence.rb
index 82f9ea0c9c..ce4106a5e1 100644
--- a/activemodel/lib/active_model/validations/presence.rb
+++ b/activemodel/lib/active_model/validations/presence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveModel
   module Validations
     class PresenceValidator < EachValidator # :nodoc:
diff --git a/activemodel/lib/active_model/validations/validates.rb b/activemodel/lib/active_model/validations/validates.rb
index 45a7007c45..a8b958e974 100644
--- a/activemodel/lib/active_model/validations/validates.rb
+++ b/activemodel/lib/active_model/validations/validates.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validations/with.rb b/activemodel/lib/active_model/validations/with.rb
index b485846c6d..9227dd06ff 100644
--- a/activemodel/lib/active_model/validations/with.rb
+++ b/activemodel/lib/active_model/validations/with.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/validator.rb b/activemodel/lib/active_model/validator.rb
index 976cf56a5e..6c11981e1d 100644
--- a/activemodel/lib/active_model/validator.rb
+++ b/activemodel/lib/active_model/validator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/anonymous"
 
 module ActiveModel
diff --git a/activemodel/lib/active_model/version.rb b/activemodel/lib/active_model/version.rb
index 09667cf425..6e7fd227fd 100644
--- a/activemodel/lib/active_model/version.rb
+++ b/activemodel/lib/active_model/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActiveModel
diff --git a/activemodel/test/cases/attribute_assignment_test.rb b/activemodel/test/cases/attribute_assignment_test.rb
index 5ec55676da..fa41d1b95f 100644
--- a/activemodel/test/cases/attribute_assignment_test.rb
+++ b/activemodel/test/cases/attribute_assignment_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/hash_with_indifferent_access"
diff --git a/activemodel/test/cases/attribute_methods_test.rb b/activemodel/test/cases/attribute_methods_test.rb
index 4b03c581e9..4767accb7c 100644
--- a/activemodel/test/cases/attribute_methods_test.rb
+++ b/activemodel/test/cases/attribute_methods_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ModelWithAttributes
diff --git a/activemodel/test/cases/callbacks_test.rb b/activemodel/test/cases/callbacks_test.rb
index f236cb3997..f85cd7dec4 100644
--- a/activemodel/test/cases/callbacks_test.rb
+++ b/activemodel/test/cases/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class CallbacksTest < ActiveModel::TestCase
diff --git a/activemodel/test/cases/conversion_test.rb b/activemodel/test/cases/conversion_test.rb
index 145a7b4e7f..4a93347abc 100644
--- a/activemodel/test/cases/conversion_test.rb
+++ b/activemodel/test/cases/conversion_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/contact"
 require "models/helicopter"
diff --git a/activemodel/test/cases/dirty_test.rb b/activemodel/test/cases/dirty_test.rb
index 18d2db7edf..0242b96083 100644
--- a/activemodel/test/cases/dirty_test.rb
+++ b/activemodel/test/cases/dirty_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class DirtyTest < ActiveModel::TestCase
diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index 790113331d..43aee5a814 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/string/strip"
 require "yaml"
diff --git a/activemodel/test/cases/forbidden_attributes_protection_test.rb b/activemodel/test/cases/forbidden_attributes_protection_test.rb
index b2211b069c..d8cc72e662 100644
--- a/activemodel/test/cases/forbidden_attributes_protection_test.rb
+++ b/activemodel/test/cases/forbidden_attributes_protection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/hash/indifferent_access"
 require "models/account"
diff --git a/activemodel/test/cases/helper.rb b/activemodel/test/cases/helper.rb
index be0817624c..eeb5c85a48 100644
--- a/activemodel/test/cases/helper.rb
+++ b/activemodel/test/cases/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model"
 
 # Show backtraces for deprecated behavior for quicker cleanup.
diff --git a/activemodel/test/cases/lint_test.rb b/activemodel/test/cases/lint_test.rb
index 29443f212f..7a817d7c01 100644
--- a/activemodel/test/cases/lint_test.rb
+++ b/activemodel/test/cases/lint_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class LintTest < ActiveModel::TestCase
diff --git a/activemodel/test/cases/model_test.rb b/activemodel/test/cases/model_test.rb
index 593077a768..ba87cd1506 100644
--- a/activemodel/test/cases/model_test.rb
+++ b/activemodel/test/cases/model_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ModelTest < ActiveModel::TestCase
diff --git a/activemodel/test/cases/naming_test.rb b/activemodel/test/cases/naming_test.rb
index 068cb93762..d5cb1a62bc 100644
--- a/activemodel/test/cases/naming_test.rb
+++ b/activemodel/test/cases/naming_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/contact"
 require "models/sheep"
diff --git a/activemodel/test/cases/railtie_test.rb b/activemodel/test/cases/railtie_test.rb
index faace1be85..a56b26b5ee 100644
--- a/activemodel/test/cases/railtie_test.rb
+++ b/activemodel/test/cases/railtie_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/testing/isolation"
 
diff --git a/activemodel/test/cases/secure_password_test.rb b/activemodel/test/cases/secure_password_test.rb
index 92368a5512..77ce86f392 100644
--- a/activemodel/test/cases/secure_password_test.rb
+++ b/activemodel/test/cases/secure_password_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/user"
 require "models/visitor"
diff --git a/activemodel/test/cases/serialization_test.rb b/activemodel/test/cases/serialization_test.rb
index 8611dcbf0b..f78efd2f0c 100644
--- a/activemodel/test/cases/serialization_test.rb
+++ b/activemodel/test/cases/serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/object/instance_variables"
 
diff --git a/activemodel/test/cases/serializers/json_serialization_test.rb b/activemodel/test/cases/serializers/json_serialization_test.rb
index c6981e86e1..d15ba64eb0 100644
--- a/activemodel/test/cases/serializers/json_serialization_test.rb
+++ b/activemodel/test/cases/serializers/json_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/contact"
 require "active_support/core_ext/object/instance_variables"
diff --git a/activemodel/test/cases/translation_test.rb b/activemodel/test/cases/translation_test.rb
index aa2c41849d..9972f9daea 100644
--- a/activemodel/test/cases/translation_test.rb
+++ b/activemodel/test/cases/translation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/person"
 
diff --git a/activemodel/test/cases/type/big_integer_test.rb b/activemodel/test/cases/type/big_integer_test.rb
index fba019c01f..56002b7cc6 100644
--- a/activemodel/test/cases/type/big_integer_test.rb
+++ b/activemodel/test/cases/type/big_integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/binary_test.rb b/activemodel/test/cases/type/binary_test.rb
index b0ae5c3423..e9c2ccfca4 100644
--- a/activemodel/test/cases/type/binary_test.rb
+++ b/activemodel/test/cases/type/binary_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/boolean_test.rb b/activemodel/test/cases/type/boolean_test.rb
index e8ed904c75..92e5aebfb7 100644
--- a/activemodel/test/cases/type/boolean_test.rb
+++ b/activemodel/test/cases/type/boolean_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/date_test.rb b/activemodel/test/cases/type/date_test.rb
index ef21e52361..0cc90e99d3 100644
--- a/activemodel/test/cases/type/date_test.rb
+++ b/activemodel/test/cases/type/date_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/date_time_test.rb b/activemodel/test/cases/type/date_time_test.rb
index fd717d8793..75a7fc686e 100644
--- a/activemodel/test/cases/type/date_time_test.rb
+++ b/activemodel/test/cases/type/date_time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/decimal_test.rb b/activemodel/test/cases/type/decimal_test.rb
index 18b1e60127..c3b43725cc 100644
--- a/activemodel/test/cases/type/decimal_test.rb
+++ b/activemodel/test/cases/type/decimal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/float_test.rb b/activemodel/test/cases/type/float_test.rb
index 594a7fc668..8026d63ad5 100644
--- a/activemodel/test/cases/type/float_test.rb
+++ b/activemodel/test/cases/type/float_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/immutable_string_test.rb b/activemodel/test/cases/type/immutable_string_test.rb
index 5b2830d4a4..23e58974fb 100644
--- a/activemodel/test/cases/type/immutable_string_test.rb
+++ b/activemodel/test/cases/type/immutable_string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/integer_test.rb b/activemodel/test/cases/type/integer_test.rb
index 67ee6307ea..a91144036b 100644
--- a/activemodel/test/cases/type/integer_test.rb
+++ b/activemodel/test/cases/type/integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 require "active_support/core_ext/numeric/time"
diff --git a/activemodel/test/cases/type/registry_test.rb b/activemodel/test/cases/type/registry_test.rb
index b2901253a5..927b6d0307 100644
--- a/activemodel/test/cases/type/registry_test.rb
+++ b/activemodel/test/cases/type/registry_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/string_test.rb b/activemodel/test/cases/type/string_test.rb
index 9c604bcec2..5bf9fc3527 100644
--- a/activemodel/test/cases/type/string_test.rb
+++ b/activemodel/test/cases/type/string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/time_test.rb b/activemodel/test/cases/type/time_test.rb
index aa114fc911..0cc4d33caa 100644
--- a/activemodel/test/cases/type/time_test.rb
+++ b/activemodel/test/cases/type/time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/type/value_test.rb b/activemodel/test/cases/type/value_test.rb
index d294e86ef9..d8b3e7f164 100644
--- a/activemodel/test/cases/type/value_test.rb
+++ b/activemodel/test/cases/type/value_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_model/type"
 
diff --git a/activemodel/test/cases/validations/absence_validation_test.rb b/activemodel/test/cases/validations/absence_validation_test.rb
index 10a42fba59..833f694c5a 100644
--- a/activemodel/test/cases/validations/absence_validation_test.rb
+++ b/activemodel/test/cases/validations/absence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/person"
diff --git a/activemodel/test/cases/validations/acceptance_validation_test.rb b/activemodel/test/cases/validations/acceptance_validation_test.rb
index 78619abdb8..fbd994e914 100644
--- a/activemodel/test/cases/validations/acceptance_validation_test.rb
+++ b/activemodel/test/cases/validations/acceptance_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/callbacks_test.rb b/activemodel/test/cases/validations/callbacks_test.rb
index 9ef59b917a..f2e4a5946d 100644
--- a/activemodel/test/cases/validations/callbacks_test.rb
+++ b/activemodel/test/cases/validations/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Dog
diff --git a/activemodel/test/cases/validations/conditional_validation_test.rb b/activemodel/test/cases/validations/conditional_validation_test.rb
index c86124c8ea..048d27446e 100644
--- a/activemodel/test/cases/validations/conditional_validation_test.rb
+++ b/activemodel/test/cases/validations/conditional_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/confirmation_validation_test.rb b/activemodel/test/cases/validations/confirmation_validation_test.rb
index 1d3e2390e6..7ddf3ad273 100644
--- a/activemodel/test/cases/validations/confirmation_validation_test.rb
+++ b/activemodel/test/cases/validations/confirmation_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/exclusion_validation_test.rb b/activemodel/test/cases/validations/exclusion_validation_test.rb
index 2bef74fd6c..06ae4fbecd 100644
--- a/activemodel/test/cases/validations/exclusion_validation_test.rb
+++ b/activemodel/test/cases/validations/exclusion_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/numeric/time"
 
diff --git a/activemodel/test/cases/validations/format_validation_test.rb b/activemodel/test/cases/validations/format_validation_test.rb
index 3bde650d37..f5b1ad721c 100644
--- a/activemodel/test/cases/validations/format_validation_test.rb
+++ b/activemodel/test/cases/validations/format_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/i18n_generate_message_validation_test.rb b/activemodel/test/cases/validations/i18n_generate_message_validation_test.rb
index 462a2254d2..f049ee26e8 100644
--- a/activemodel/test/cases/validations/i18n_generate_message_validation_test.rb
+++ b/activemodel/test/cases/validations/i18n_generate_message_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/person"
diff --git a/activemodel/test/cases/validations/i18n_validation_test.rb b/activemodel/test/cases/validations/i18n_validation_test.rb
index d6a00a6630..f28cfc0ef5 100644
--- a/activemodel/test/cases/validations/i18n_validation_test.rb
+++ b/activemodel/test/cases/validations/i18n_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/person"
 
diff --git a/activemodel/test/cases/validations/inclusion_validation_test.rb b/activemodel/test/cases/validations/inclusion_validation_test.rb
index 537ff45626..5aa43ea4a9 100644
--- a/activemodel/test/cases/validations/inclusion_validation_test.rb
+++ b/activemodel/test/cases/validations/inclusion_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/all"
 
diff --git a/activemodel/test/cases/validations/length_validation_test.rb b/activemodel/test/cases/validations/length_validation_test.rb
index 03e73546da..95ee87b401 100644
--- a/activemodel/test/cases/validations/length_validation_test.rb
+++ b/activemodel/test/cases/validations/length_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/numericality_validation_test.rb b/activemodel/test/cases/validations/numericality_validation_test.rb
index aadc825b52..c0158e075f 100644
--- a/activemodel/test/cases/validations/numericality_validation_test.rb
+++ b/activemodel/test/cases/validations/numericality_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/presence_validation_test.rb b/activemodel/test/cases/validations/presence_validation_test.rb
index af3d7401ed..642dd0f144 100644
--- a/activemodel/test/cases/validations/presence_validation_test.rb
+++ b/activemodel/test/cases/validations/presence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/validates_test.rb b/activemodel/test/cases/validations/validates_test.rb
index fe602a2316..011033606e 100644
--- a/activemodel/test/cases/validations/validates_test.rb
+++ b/activemodel/test/cases/validations/validates_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/person"
 require "models/topic"
diff --git a/activemodel/test/cases/validations/validations_context_test.rb b/activemodel/test/cases/validations/validations_context_test.rb
index 04108eb2a0..25c37a572f 100644
--- a/activemodel/test/cases/validations/validations_context_test.rb
+++ b/activemodel/test/cases/validations/validations_context_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations/with_validation_test.rb b/activemodel/test/cases/validations/with_validation_test.rb
index 70f1337035..5ce86738cd 100644
--- a/activemodel/test/cases/validations/with_validation_test.rb
+++ b/activemodel/test/cases/validations/with_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/cases/validations_test.rb b/activemodel/test/cases/validations_test.rb
index 83be8b26da..6647191205 100644
--- a/activemodel/test/cases/validations_test.rb
+++ b/activemodel/test/cases/validations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 require "models/topic"
diff --git a/activemodel/test/models/account.rb b/activemodel/test/models/account.rb
index c25d12e138..eed668d38f 100644
--- a/activemodel/test/models/account.rb
+++ b/activemodel/test/models/account.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Account
   include ActiveModel::ForbiddenAttributesProtection
 
diff --git a/activemodel/test/models/blog_post.rb b/activemodel/test/models/blog_post.rb
index 2a6240fb04..46eba857df 100644
--- a/activemodel/test/models/blog_post.rb
+++ b/activemodel/test/models/blog_post.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Blog
   def self.use_relative_model_naming?
     true
diff --git a/activemodel/test/models/contact.rb b/activemodel/test/models/contact.rb
index 9853bc6234..113ab0bc1f 100644
--- a/activemodel/test/models/contact.rb
+++ b/activemodel/test/models/contact.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Contact
   extend ActiveModel::Naming
   include ActiveModel::Conversion
diff --git a/activemodel/test/models/custom_reader.rb b/activemodel/test/models/custom_reader.rb
index a6f983e3ca..dc26bb10ff 100644
--- a/activemodel/test/models/custom_reader.rb
+++ b/activemodel/test/models/custom_reader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CustomReader
   include ActiveModel::Validations
 
diff --git a/activemodel/test/models/helicopter.rb b/activemodel/test/models/helicopter.rb
index 33877e1fba..933f3c463a 100644
--- a/activemodel/test/models/helicopter.rb
+++ b/activemodel/test/models/helicopter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Helicopter
   include ActiveModel::Conversion
 end
diff --git a/activemodel/test/models/person.rb b/activemodel/test/models/person.rb
index 94a3275514..e896e90f98 100644
--- a/activemodel/test/models/person.rb
+++ b/activemodel/test/models/person.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Person
   include ActiveModel::Validations
   extend  ActiveModel::Translation
diff --git a/activemodel/test/models/person_with_validator.rb b/activemodel/test/models/person_with_validator.rb
index b32730abc1..505ed880c1 100644
--- a/activemodel/test/models/person_with_validator.rb
+++ b/activemodel/test/models/person_with_validator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PersonWithValidator
   include ActiveModel::Validations
 
diff --git a/activemodel/test/models/reply.rb b/activemodel/test/models/reply.rb
index 9a6b4864f1..3fe11043d2 100644
--- a/activemodel/test/models/reply.rb
+++ b/activemodel/test/models/reply.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "models/topic"
 
 class Reply < Topic
diff --git a/activemodel/test/models/sheep.rb b/activemodel/test/models/sheep.rb
index f62a98777a..7aba055c4f 100644
--- a/activemodel/test/models/sheep.rb
+++ b/activemodel/test/models/sheep.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Sheep
   extend ActiveModel::Naming
 end
diff --git a/activemodel/test/models/topic.rb b/activemodel/test/models/topic.rb
index 37dc437e81..192786c096 100644
--- a/activemodel/test/models/topic.rb
+++ b/activemodel/test/models/topic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Topic
   include ActiveModel::Validations
   include ActiveModel::Validations::Callbacks
diff --git a/activemodel/test/models/track_back.rb b/activemodel/test/models/track_back.rb
index 80c4075b00..357ee37d6d 100644
--- a/activemodel/test/models/track_back.rb
+++ b/activemodel/test/models/track_back.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Post
   class TrackBack
     def to_model
diff --git a/activemodel/test/models/user.rb b/activemodel/test/models/user.rb
index 106b487cbc..6556b1a7d9 100644
--- a/activemodel/test/models/user.rb
+++ b/activemodel/test/models/user.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class User
   extend ActiveModel::Callbacks
   include ActiveModel::SecurePassword
diff --git a/activemodel/test/models/visitor.rb b/activemodel/test/models/visitor.rb
index 5bcd5d6458..22ad1a3c3d 100644
--- a/activemodel/test/models/visitor.rb
+++ b/activemodel/test/models/visitor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Visitor
   extend ActiveModel::Callbacks
   include ActiveModel::SecurePassword
diff --git a/activemodel/test/validators/email_validator.rb b/activemodel/test/validators/email_validator.rb
index 206c3d319c..f733c45cf0 100644
--- a/activemodel/test/validators/email_validator.rb
+++ b/activemodel/test/validators/email_validator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class EmailValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     record.errors[attribute] << (options[:message] || "is not an email") unless
diff --git a/activemodel/test/validators/namespace/email_validator.rb b/activemodel/test/validators/namespace/email_validator.rb
index 4c37f6f3a2..8639045b0d 100644
--- a/activemodel/test/validators/namespace/email_validator.rb
+++ b/activemodel/test/validators/namespace/email_validator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "validators/email_validator"
 
 module Namespace
diff --git a/activerecord/Rakefile b/activerecord/Rakefile
index 4347071693..fe5f9d1071 100644
--- a/activerecord/Rakefile
+++ b/activerecord/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 require_relative "test/config"
diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index b28cb0c2f7..a626a1f21b 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/activerecord/bin/test b/activerecord/bin/test
index 83c192531e..ab69f4f603 100755
--- a/activerecord/bin/test
+++ b/activerecord/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/activerecord/examples/performance.rb b/activerecord/examples/performance.rb
index 74e5ffd976..3257dd4ad7 100644
--- a/activerecord/examples/performance.rb
+++ b/activerecord/examples/performance.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record"
 require "benchmark/ips"
 
diff --git a/activerecord/examples/simple.rb b/activerecord/examples/simple.rb
index 6b9bc781d1..c3648fee48 100644
--- a/activerecord/examples/simple.rb
+++ b/activerecord/examples/simple.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record"
 
 class Person < ActiveRecord::Base
diff --git a/activerecord/lib/active_record.rb b/activerecord/lib/active_record.rb
index 11300da52a..29f49c6195 100644
--- a/activerecord/lib/active_record.rb
+++ b/activerecord/lib/active_record.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb
index e0caad5381..10cbd5429c 100644
--- a/activerecord/lib/active_record/aggregations.rb
+++ b/activerecord/lib/active_record/aggregations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # See ActiveRecord::Aggregations::ClassMethods for documentation
   module Aggregations
diff --git a/activerecord/lib/active_record/association_relation.rb b/activerecord/lib/active_record/association_relation.rb
index a79112cb3b..de2d03cd0b 100644
--- a/activerecord/lib/active_record/association_relation.rb
+++ b/activerecord/lib/active_record/association_relation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class AssociationRelation < Relation
     def initialize(klass, table, predicate_builder, association)
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 13db82b2aa..f05a122544 100644
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/enumerable"
 require "active_support/core_ext/string/conversions"
 require "active_support/core_ext/module/remove_method"
diff --git a/activerecord/lib/active_record/associations/alias_tracker.rb b/activerecord/lib/active_record/associations/alias_tracker.rb
index eb81ba5ff6..104de4f69d 100644
--- a/activerecord/lib/active_record/associations/alias_tracker.rb
+++ b/activerecord/lib/active_record/associations/alias_tracker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/conversions"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/associations/association.rb b/activerecord/lib/active_record/associations/association.rb
index 0fca4467f9..1138ae3462 100644
--- a/activerecord/lib/active_record/associations/association.rb
+++ b/activerecord/lib/active_record/associations/association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/wrap"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/associations/association_scope.rb b/activerecord/lib/active_record/associations/association_scope.rb
index 900ebda2bb..6ef225b725 100644
--- a/activerecord/lib/active_record/associations/association_scope.rb
+++ b/activerecord/lib/active_record/associations/association_scope.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class AssociationScope #:nodoc:
diff --git a/activerecord/lib/active_record/associations/belongs_to_association.rb b/activerecord/lib/active_record/associations/belongs_to_association.rb
index b8d3173dc7..0e61dbfb00 100644
--- a/activerecord/lib/active_record/associations/belongs_to_association.rb
+++ b/activerecord/lib/active_record/associations/belongs_to_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Belongs To Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/belongs_to_polymorphic_association.rb b/activerecord/lib/active_record/associations/belongs_to_polymorphic_association.rb
index 15aae53e80..b710cf6bdb 100644
--- a/activerecord/lib/active_record/associations/belongs_to_polymorphic_association.rb
+++ b/activerecord/lib/active_record/associations/belongs_to_polymorphic_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Belongs To Polymorphic Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/builder/association.rb b/activerecord/lib/active_record/associations/builder/association.rb
index df8d77a5d1..d0534056d9 100644
--- a/activerecord/lib/active_record/associations/builder/association.rb
+++ b/activerecord/lib/active_record/associations/builder/association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # This is the parent Association class which defines the variables
 # used by all associations.
 #
diff --git a/activerecord/lib/active_record/associations/builder/belongs_to.rb b/activerecord/lib/active_record/associations/builder/belongs_to.rb
index 7c2cc61ecd..2b9dd8aae8 100644
--- a/activerecord/lib/active_record/associations/builder/belongs_to.rb
+++ b/activerecord/lib/active_record/associations/builder/belongs_to.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord::Associations::Builder # :nodoc:
   class BelongsTo < SingularAssociation #:nodoc:
     def self.macro
diff --git a/activerecord/lib/active_record/associations/builder/collection_association.rb b/activerecord/lib/active_record/associations/builder/collection_association.rb
index f6e471feca..1fb8f76f2e 100644
--- a/activerecord/lib/active_record/associations/builder/collection_association.rb
+++ b/activerecord/lib/active_record/associations/builder/collection_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/associations"
 
 module ActiveRecord::Associations::Builder # :nodoc:
diff --git a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
index c3e62c1a3d..6b71826431 100644
--- a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
+++ b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord::Associations::Builder # :nodoc:
   class HasAndBelongsToMany # :nodoc:
     class JoinTableResolver # :nodoc:
diff --git a/activerecord/lib/active_record/associations/builder/has_many.rb b/activerecord/lib/active_record/associations/builder/has_many.rb
index 3e83fad619..7864d4c536 100644
--- a/activerecord/lib/active_record/associations/builder/has_many.rb
+++ b/activerecord/lib/active_record/associations/builder/has_many.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord::Associations::Builder # :nodoc:
   class HasMany < CollectionAssociation #:nodoc:
     def self.macro
diff --git a/activerecord/lib/active_record/associations/builder/has_one.rb b/activerecord/lib/active_record/associations/builder/has_one.rb
index 66135bbc2d..4de846d12b 100644
--- a/activerecord/lib/active_record/associations/builder/has_one.rb
+++ b/activerecord/lib/active_record/associations/builder/has_one.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord::Associations::Builder # :nodoc:
   class HasOne < SingularAssociation #:nodoc:
     def self.macro
diff --git a/activerecord/lib/active_record/associations/builder/singular_association.rb b/activerecord/lib/active_record/associations/builder/singular_association.rb
index 3a154ba25f..7732b63af6 100644
--- a/activerecord/lib/active_record/associations/builder/singular_association.rb
+++ b/activerecord/lib/active_record/associations/builder/singular_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # This class is inherited by the has_one and belongs_to association classes
 
 module ActiveRecord::Associations::Builder # :nodoc:
diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index 8bed7121a8..a49fb155ee 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     # = Active Record Association Collection
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb
index 6ccdaebbe3..d77fcaf668 100644
--- a/activerecord/lib/active_record/associations/collection_proxy.rb
+++ b/activerecord/lib/active_record/associations/collection_proxy.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     # Association proxies in Active Record are middlemen between the object that
diff --git a/activerecord/lib/active_record/associations/foreign_association.rb b/activerecord/lib/active_record/associations/foreign_association.rb
index 1fb6ff7bff..3ceec0ee46 100644
--- a/activerecord/lib/active_record/associations/foreign_association.rb
+++ b/activerecord/lib/active_record/associations/foreign_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord::Associations
   module ForeignAssociation # :nodoc:
     def foreign_key_present?
diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb
index 4e0c89791e..10ca0e47ff 100644
--- a/activerecord/lib/active_record/associations/has_many_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Has Many Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index c4ed91aeca..2fd20b4368 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Has Many Through Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/has_one_association.rb b/activerecord/lib/active_record/associations/has_one_association.rb
index a78c1b1d32..8458253ff8 100644
--- a/activerecord/lib/active_record/associations/has_one_association.rb
+++ b/activerecord/lib/active_record/associations/has_one_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Has One Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/has_one_through_association.rb b/activerecord/lib/active_record/associations/has_one_through_association.rb
index 1e8b2244d9..1183bdf6f4 100644
--- a/activerecord/lib/active_record/associations/has_one_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_one_through_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Has One Through Association
   module Associations
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb
index 011bbaad5c..04cdcb6a7f 100644
--- a/activerecord/lib/active_record/associations/join_dependency.rb
+++ b/activerecord/lib/active_record/associations/join_dependency.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class JoinDependency # :nodoc:
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_association.rb b/activerecord/lib/active_record/associations/join_dependency/join_association.rb
index 5df23e92ca..005410d598 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_association.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/associations/join_dependency/join_part"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_base.rb b/activerecord/lib/active_record/associations/join_dependency/join_base.rb
index aa02c5f056..fca20514d1 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_base.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/associations/join_dependency/join_part"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_part.rb b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
index 0604333f30..80c9fde5d1 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_part.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class JoinDependency # :nodoc:
diff --git a/activerecord/lib/active_record/associations/preloader.rb b/activerecord/lib/active_record/associations/preloader.rb
index 130494f712..208d1b2670 100644
--- a/activerecord/lib/active_record/associations/preloader.rb
+++ b/activerecord/lib/active_record/associations/preloader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     # Implements the details of eager loading of Active Record associations.
diff --git a/activerecord/lib/active_record/associations/preloader/association.rb b/activerecord/lib/active_record/associations/preloader/association.rb
index 6a8425c989..63ef3f2d8c 100644
--- a/activerecord/lib/active_record/associations/preloader/association.rb
+++ b/activerecord/lib/active_record/associations/preloader/association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/belongs_to.rb b/activerecord/lib/active_record/associations/preloader/belongs_to.rb
index ee7be18d15..c20145770f 100644
--- a/activerecord/lib/active_record/associations/preloader/belongs_to.rb
+++ b/activerecord/lib/active_record/associations/preloader/belongs_to.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/collection_association.rb b/activerecord/lib/active_record/associations/preloader/collection_association.rb
index 59c0bc4d8e..26690bf16d 100644
--- a/activerecord/lib/active_record/associations/preloader/collection_association.rb
+++ b/activerecord/lib/active_record/associations/preloader/collection_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/has_many.rb b/activerecord/lib/active_record/associations/preloader/has_many.rb
index 197f561b95..20df1cc19a 100644
--- a/activerecord/lib/active_record/associations/preloader/has_many.rb
+++ b/activerecord/lib/active_record/associations/preloader/has_many.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/has_many_through.rb b/activerecord/lib/active_record/associations/preloader/has_many_through.rb
index 3bd561c187..2029871f39 100644
--- a/activerecord/lib/active_record/associations/preloader/has_many_through.rb
+++ b/activerecord/lib/active_record/associations/preloader/has_many_through.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/has_one.rb b/activerecord/lib/active_record/associations/preloader/has_one.rb
index d6254d8c56..c4add621ca 100644
--- a/activerecord/lib/active_record/associations/preloader/has_one.rb
+++ b/activerecord/lib/active_record/associations/preloader/has_one.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/has_one_through.rb b/activerecord/lib/active_record/associations/preloader/has_one_through.rb
index 512ca82005..f063f85574 100644
--- a/activerecord/lib/active_record/associations/preloader/has_one_through.rb
+++ b/activerecord/lib/active_record/associations/preloader/has_one_through.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/singular_association.rb b/activerecord/lib/active_record/associations/preloader/singular_association.rb
index 5583c7d79c..5c5828262e 100644
--- a/activerecord/lib/active_record/associations/preloader/singular_association.rb
+++ b/activerecord/lib/active_record/associations/preloader/singular_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/preloader/through_association.rb b/activerecord/lib/active_record/associations/preloader/through_association.rb
index 8e12afc695..34587fd3f5 100644
--- a/activerecord/lib/active_record/associations/preloader/through_association.rb
+++ b/activerecord/lib/active_record/associations/preloader/through_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class Preloader
diff --git a/activerecord/lib/active_record/associations/singular_association.rb b/activerecord/lib/active_record/associations/singular_association.rb
index 891caa44c3..f8bbe4c2ed 100644
--- a/activerecord/lib/active_record/associations/singular_association.rb
+++ b/activerecord/lib/active_record/associations/singular_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Associations
     class SingularAssociation < Association #:nodoc:
diff --git a/activerecord/lib/active_record/associations/through_association.rb b/activerecord/lib/active_record/associations/through_association.rb
index fd4c1a1e78..6b87993ba3 100644
--- a/activerecord/lib/active_record/associations/through_association.rb
+++ b/activerecord/lib/active_record/associations/through_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Through Association
   module Associations
diff --git a/activerecord/lib/active_record/attribute.rb b/activerecord/lib/active_record/attribute.rb
index 7bb0280861..78662433eb 100644
--- a/activerecord/lib/active_record/attribute.rb
+++ b/activerecord/lib/active_record/attribute.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Attribute # :nodoc:
     class << self
diff --git a/activerecord/lib/active_record/attribute/user_provided_default.rb b/activerecord/lib/active_record/attribute/user_provided_default.rb
index b2e9ff9d99..57f8bbed76 100644
--- a/activerecord/lib/active_record/attribute/user_provided_default.rb
+++ b/activerecord/lib/active_record/attribute/user_provided_default.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/attribute"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/attribute_assignment.rb b/activerecord/lib/active_record/attribute_assignment.rb
index 39ba094b6d..d0dfca0cac 100644
--- a/activerecord/lib/active_record/attribute_assignment.rb
+++ b/activerecord/lib/active_record/attribute_assignment.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/forbidden_attributes_protection"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/attribute_decorators.rb b/activerecord/lib/active_record/attribute_decorators.rb
index cb744d7b61..5bc8527745 100644
--- a/activerecord/lib/active_record/attribute_decorators.rb
+++ b/activerecord/lib/active_record/attribute_decorators.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeDecorators # :nodoc:
     extend ActiveSupport::Concern
diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb
index b718da8555..83c61fad19 100644
--- a/activerecord/lib/active_record/attribute_methods.rb
+++ b/activerecord/lib/active_record/attribute_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/enumerable"
 require "active_support/core_ext/string/filters"
 require "mutex_m"
diff --git a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
index 7cdb85e6cf..115eb1ef3f 100644
--- a/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
+++ b/activerecord/lib/active_record/attribute_methods/before_type_cast.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     # = Active Record Attribute Methods Before Type Cast
diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb
index ca21eae7c1..b9b2acff37 100644
--- a/activerecord/lib/active_record/attribute_methods/primary_key.rb
+++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/attribute_methods/query.rb b/activerecord/lib/active_record/attribute_methods/query.rb
index db86ef428e..10498f4322 100644
--- a/activerecord/lib/active_record/attribute_methods/query.rb
+++ b/activerecord/lib/active_record/attribute_methods/query.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     module Query
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb
index 9d85af9424..fdc4bf6621 100644
--- a/activerecord/lib/active_record/attribute_methods/read.rb
+++ b/activerecord/lib/active_record/attribute_methods/read.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     module Read
diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb
index 0f267e3a34..4d9aff76cc 100644
--- a/activerecord/lib/active_record/attribute_methods/serialization.rb
+++ b/activerecord/lib/active_record/attribute_methods/serialization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     module Serialization
diff --git a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
index 0c5f0a2fd1..1f1efe8812 100644
--- a/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
+++ b/activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     module TimeZoneConversion
diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb
index 166cab7dd6..75c5a1a600 100644
--- a/activerecord/lib/active_record/attribute_methods/write.rb
+++ b/activerecord/lib/active_record/attribute_methods/write.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module AttributeMethods
     module Write
diff --git a/activerecord/lib/active_record/attribute_mutation_tracker.rb b/activerecord/lib/active_record/attribute_mutation_tracker.rb
index 4b0d52742b..4de993e169 100644
--- a/activerecord/lib/active_record/attribute_mutation_tracker.rb
+++ b/activerecord/lib/active_record/attribute_mutation_tracker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class AttributeMutationTracker # :nodoc:
     OPTION_NOT_GIVEN = Object.new
diff --git a/activerecord/lib/active_record/attribute_set.rb b/activerecord/lib/active_record/attribute_set.rb
index 76de68ac70..01f9d815d5 100644
--- a/activerecord/lib/active_record/attribute_set.rb
+++ b/activerecord/lib/active_record/attribute_set.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/attribute_set/builder"
 require "active_record/attribute_set/yaml_encoder"
 
diff --git a/activerecord/lib/active_record/attribute_set/builder.rb b/activerecord/lib/active_record/attribute_set/builder.rb
index 9b75f185f7..2f624d32af 100644
--- a/activerecord/lib/active_record/attribute_set/builder.rb
+++ b/activerecord/lib/active_record/attribute_set/builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/attribute"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/attribute_set/yaml_encoder.rb b/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
index f3d726f53c..899de14792 100644
--- a/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
+++ b/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class AttributeSet
     # Attempts to do more intelligent YAML dumping of an
diff --git a/activerecord/lib/active_record/attributes.rb b/activerecord/lib/active_record/attributes.rb
index 0dceb417a5..475b9beec4 100644
--- a/activerecord/lib/active_record/attributes.rb
+++ b/activerecord/lib/active_record/attributes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/attribute/user_provided_default"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb
index 137e9673ab..70f0e2af8e 100644
--- a/activerecord/lib/active_record/autosave_association.rb
+++ b/activerecord/lib/active_record/autosave_association.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Autosave Association
   #
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 5229c82f3a..ac1aa2df45 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 require "active_support/benchmarkable"
 require "active_support/dependencies"
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index b25a8e4033..eb44887e18 100644
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record \Callbacks
   #
diff --git a/activerecord/lib/active_record/coders/json.rb b/activerecord/lib/active_record/coders/json.rb
index a7ad65fbf4..cb185a881e 100644
--- a/activerecord/lib/active_record/coders/json.rb
+++ b/activerecord/lib/active_record/coders/json.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Coders # :nodoc:
     class JSON # :nodoc:
diff --git a/activerecord/lib/active_record/coders/yaml_column.rb b/activerecord/lib/active_record/coders/yaml_column.rb
index 7186252b8b..9c52a31b95 100644
--- a/activerecord/lib/active_record/coders/yaml_column.rb
+++ b/activerecord/lib/active_record/coders/yaml_column.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/collection_cache_key.rb b/activerecord/lib/active_record/collection_cache_key.rb
index 7831aee3a4..8b937b6703 100644
--- a/activerecord/lib/active_record/collection_cache_key.rb
+++ b/activerecord/lib/active_record/collection_cache_key.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module CollectionCacheKey
     def collection_cache_key(collection = all, timestamp_column = :updated_at) # :nodoc:
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
index 71a2ac24ea..627b753f01 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 require "concurrent/map"
 require "monitor"
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
index 6331b1546a..407e019326 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
     module DatabaseLimits
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
index c8cf840181..879626b72a 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
     module DatabaseStatements
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
index 31d8f53a10..c352ddfc11 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
     module QueryCache
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
index 631e5176bb..61233dcc51 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/big_decimal/conversions"
 require "active_support/multibyte/chars"
 
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/savepoints.rb b/activerecord/lib/active_record/connection_adapters/abstract/savepoints.rb
index b1b793828d..3a06f75292 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/savepoints.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/savepoints.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module Savepoints
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb
index a3f9edbc6c..8865e7c703 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/strip"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 6dbf669993..a30fbe0e05 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters #:nodoc:
     # Abstract representation of an index definition on a table. Instances of
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
index ef8038b5c3..34036d8a1d 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
     # The goal of this module is to move Adapter specific column
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 4aed0e214f..6aed00584a 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/migration/join_table"
 require "active_support/core_ext/string/access"
 require "digest"
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
index 013cf5bfb6..19b7821494 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     class TransactionState
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index a7d8a80224..9a085df934 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/type"
 require "active_record/connection_adapters/determine_if_preparable_visitor"
 require "active_record/connection_adapters/schema_cache"
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index d49fa7ed24..062fede1ce 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/connection_adapters/abstract_adapter"
 require "active_record/connection_adapters/statement_pool"
 require "active_record/connection_adapters/mysql/column"
diff --git a/activerecord/lib/active_record/connection_adapters/column.rb b/activerecord/lib/active_record/connection_adapters/column.rb
index 34eca70253..61cd7ae4cc 100644
--- a/activerecord/lib/active_record/connection_adapters/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/column.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # :stopdoc:
   module ConnectionAdapters
diff --git a/activerecord/lib/active_record/connection_adapters/connection_specification.rb b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
index de54787458..3e4ea28f63 100644
--- a/activerecord/lib/active_record/connection_adapters/connection_specification.rb
+++ b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "uri"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb
index e57147221f..0fdc185c45 100644
--- a/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb
+++ b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module DetermineIfPreparableVisitor
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/column.rb b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
index 8bdc2a1622..c9ad47c035 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
index dcbb6cfa7a..bda482a00f 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb b/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb
index f174ba5b0e..9691060cd3 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
index 9fcf1e0a89..d4f5906b33 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb
index a890b54b5e..eea4984680 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb
index b62b857bb7..6d88c14d50 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_definitions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
index 05f12ef05b..eff96e329f 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_statements.rb
index 470e24a8e7..a01fbba201 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb
index aa4d98e06b..9ad6a6c0d0 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module MySQL
diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
index 350a99a2e4..af55cfe2f6 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/connection_adapters/abstract_mysql_adapter"
 require "active_record/connection_adapters/mysql/database_statements"
 
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
index 36382b6d57..3ad1911a28 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     # PostgreSQL-specific extensions to column definitions in a table.
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb
index 659b860cce..ebf1715ed0 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/explain_pretty_printer.rb b/activerecord/lib/active_record/connection_adapters/postgresql/explain_pretty_printer.rb
index 21d0b4a0d2..99f3a5bbdf 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/explain_pretty_printer.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/explain_pretty_printer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb
index ea07b48430..4098250f3e 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/connection_adapters/postgresql/oid/array"
 require "active_record/connection_adapters/postgresql/oid/bit"
 require "active_record/connection_adapters/postgresql/oid/bit_varying"
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb
index fd629012ec..a73a8c1726 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb
index 70e84d85c2..0a505f46a7 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit_varying.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit_varying.rb
index b4ea3b4edd..4c21097d48 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit_varying.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bit_varying.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bytea.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bytea.rb
index 4902a64330..702fa8175c 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/bytea.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/bytea.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/cidr.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/cidr.rb
index 2007665ec0..5225609e37 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/cidr.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/cidr.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "ipaddr"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb
index 110771e7a2..b7acbf7178 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/decimal.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/decimal.rb
index bc720a36c8..43d22c8daf 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/decimal.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/decimal.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb
index db1cd22b48..950d23d516 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb
index 828bcd23dd..49dd4fc73f 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/inet.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/inet.rb
index 4cc78a8c10..96486fa65b 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/inet.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/inet.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb
index bb0f8487fa..3c706c27c4 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb
index fcb6c1498d..a1fec289d4 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/jsonb.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb
index 3ed9fefee8..775eecaf85 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb
index cc3e0c9169..7a91272d1c 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/oid.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/oid.rb
index d8b47e8e29..9c2ac08b30 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/oid.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/oid.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb
index 3275f28d0c..7c764e7287 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   Point = Struct.new(:x, :y)
 
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
index eddb0fb0ac..54d5d0902e 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/specialized_string.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/specialized_string.rb
index f5270a64ab..564e82a4ac 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/specialized_string.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/specialized_string.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
index 503691f7fc..d9ae1aa7a2 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb
index 2fdf3b5d8e..5e839228e9 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/vector.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/vector.rb
index 6d86a221a7..b26e876b54 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/vector.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/vector.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/xml.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/xml.rb
index f0e21f9f23..d40d837cee 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/xml.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/xml.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
index 628f13c44a..ee4230c6f2 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb b/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb
index 3387bad79f..44a7338bf5 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb
index 5fab6f60d2..e1d5089115 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
index 32b7239f54..11ea1e5144 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
index a631e4534f..5555a46b6b 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index 14e4929919..a710ea6cc9 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/strip"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb
index 110cc88872..f57179ae59 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     class PostgreSQLTypeMetadata < DelegateClass(SqlTypeMetadata)
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb b/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb
index 6a4d6d50bd..aa7940188a 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module PostgreSQL
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 38285366b4..e63563afc4 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Make sure we're using pg high enough for type casts and Ruby 2.2+ compatibility
 gem "pg", "~> 0.18"
 require "pg"
diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
index 32aa9d803b..4d339b0a8c 100644
--- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     class SchemaCache
diff --git a/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb b/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb
index e6908e9846..9e12ae0de8 100644
--- a/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb
+++ b/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # :stopdoc:
   module ConnectionAdapters
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/explain_pretty_printer.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/explain_pretty_printer.rb
index 01cfafdd2b..6fe3e1211e 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/explain_pretty_printer.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/explain_pretty_printer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb
index c5bc797d48..7276a65098 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb
index bcd43eac08..bc798d1dbb 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_creation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb
index 7bbda675eb..e157e4b218 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_dumper.rb
index d265a60206..eec018eda3 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_dumper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
index c268fc173b..31e83f9260 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     module SQLite3
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
index 31d5b5946e..17c63d4b5f 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/connection_adapters/abstract_adapter"
 require "active_record/connection_adapters/statement_pool"
 require "active_record/connection_adapters/sqlite3/explain_pretty_printer"
diff --git a/activerecord/lib/active_record/connection_adapters/statement_pool.rb b/activerecord/lib/active_record/connection_adapters/statement_pool.rb
index e7c237d42f..790db56185 100644
--- a/activerecord/lib/active_record/connection_adapters/statement_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/statement_pool.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionAdapters
     class StatementPool # :nodoc:
diff --git a/activerecord/lib/active_record/connection_handling.rb b/activerecord/lib/active_record/connection_handling.rb
index 61f160b99d..b8fbb489b6 100644
--- a/activerecord/lib/active_record/connection_handling.rb
+++ b/activerecord/lib/active_record/connection_handling.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionHandling
     RAILS_ENV   = -> { (Rails.env if defined?(Rails.env)) || ENV["RAILS_ENV"].presence || ENV["RACK_ENV"].presence }
diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb
index f1eaa07f1a..198c712abc 100644
--- a/activerecord/lib/active_record/core.rb
+++ b/activerecord/lib/active_record/core.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/object/duplicable"
diff --git a/activerecord/lib/active_record/counter_cache.rb b/activerecord/lib/active_record/counter_cache.rb
index 5dcd28244a..cbd71a3779 100644
--- a/activerecord/lib/active_record/counter_cache.rb
+++ b/activerecord/lib/active_record/counter_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Counter Cache
   module CounterCache
diff --git a/activerecord/lib/active_record/define_callbacks.rb b/activerecord/lib/active_record/define_callbacks.rb
index 291ebd3678..7d955a24be 100644
--- a/activerecord/lib/active_record/define_callbacks.rb
+++ b/activerecord/lib/active_record/define_callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # This module exists because `ActiveRecord::AttributeMethods::Dirty` needs to
   # define callbacks, but continue to have its version of `save` be the super
diff --git a/activerecord/lib/active_record/dynamic_matchers.rb b/activerecord/lib/active_record/dynamic_matchers.rb
index a3425c8097..3a9625092e 100644
--- a/activerecord/lib/active_record/dynamic_matchers.rb
+++ b/activerecord/lib/active_record/dynamic_matchers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module DynamicMatchers #:nodoc:
     private
diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb
index 86ffa28306..12ef58a941 100644
--- a/activerecord/lib/active_record/enum.rb
+++ b/activerecord/lib/active_record/enum.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/deep_dup"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/errors.rb b/activerecord/lib/active_record/errors.rb
index 7507d61535..60d4fb70e0 100644
--- a/activerecord/lib/active_record/errors.rb
+++ b/activerecord/lib/active_record/errors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Errors
   #
diff --git a/activerecord/lib/active_record/explain.rb b/activerecord/lib/active_record/explain.rb
index 31449e810e..5e67d16e9f 100644
--- a/activerecord/lib/active_record/explain.rb
+++ b/activerecord/lib/active_record/explain.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/explain_registry"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/explain_registry.rb b/activerecord/lib/active_record/explain_registry.rb
index 0af48be6fd..ef1ce3dc85 100644
--- a/activerecord/lib/active_record/explain_registry.rb
+++ b/activerecord/lib/active_record/explain_registry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/per_thread_registry"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/explain_subscriber.rb b/activerecord/lib/active_record/explain_subscriber.rb
index 07a412a8a1..abd8cfc8f2 100644
--- a/activerecord/lib/active_record/explain_subscriber.rb
+++ b/activerecord/lib/active_record/explain_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/notifications"
 require "active_record/explain_registry"
 
diff --git a/activerecord/lib/active_record/fixture_set/file.rb b/activerecord/lib/active_record/fixture_set/file.rb
index 93b8ba07e9..6cf2e01179 100644
--- a/activerecord/lib/active_record/fixture_set/file.rb
+++ b/activerecord/lib/active_record/fixture_set/file.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "erb"
 require "yaml"
 
diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index 1835965b7f..e9acb8acae 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "erb"
 require "yaml"
 require "zlib"
diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb
index a0434766f5..1a937dbcf7 100644
--- a/activerecord/lib/active_record/gem_version.rb
+++ b/activerecord/lib/active_record/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # Returns the version of the currently loaded Active Record as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/activerecord/lib/active_record/inheritance.rb b/activerecord/lib/active_record/inheritance.rb
index 10911b9a3e..5776807507 100644
--- a/activerecord/lib/active_record/inheritance.rb
+++ b/activerecord/lib/active_record/inheritance.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb
index 2bb96457c6..cf954852bc 100644
--- a/activerecord/lib/active_record/integration.rb
+++ b/activerecord/lib/active_record/integration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/internal_metadata.rb b/activerecord/lib/active_record/internal_metadata.rb
index 9ec6b51cb3..25ee9d6bfe 100644
--- a/activerecord/lib/active_record/internal_metadata.rb
+++ b/activerecord/lib/active_record/internal_metadata.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/scoping/default"
 require "active_record/scoping/named"
 
diff --git a/activerecord/lib/active_record/legacy_yaml_adapter.rb b/activerecord/lib/active_record/legacy_yaml_adapter.rb
index ba74f1a56c..c7683f68c7 100644
--- a/activerecord/lib/active_record/legacy_yaml_adapter.rb
+++ b/activerecord/lib/active_record/legacy_yaml_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module LegacyYamlAdapter
     def self.convert(klass, coder)
diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb
index 2e2f2979d8..522da6a571 100644
--- a/activerecord/lib/active_record/locking/optimistic.rb
+++ b/activerecord/lib/active_record/locking/optimistic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Locking
     # == What is Optimistic Locking
diff --git a/activerecord/lib/active_record/locking/pessimistic.rb b/activerecord/lib/active_record/locking/pessimistic.rb
index 0fb4dc3a35..263e2a5f7f 100644
--- a/activerecord/lib/active_record/locking/pessimistic.rb
+++ b/activerecord/lib/active_record/locking/pessimistic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Locking
     # Locking::Pessimistic provides support for row-level locking using
diff --git a/activerecord/lib/active_record/log_subscriber.rb b/activerecord/lib/active_record/log_subscriber.rb
index e8593c1a48..e39ca5f6dc 100644
--- a/activerecord/lib/active_record/log_subscriber.rb
+++ b/activerecord/lib/active_record/log_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class LogSubscriber < ActiveSupport::LogSubscriber
     IGNORE_PAYLOAD_NAMES = ["SCHEMA", "EXPLAIN"]
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 1b1403b1a5..1ff1dcad43 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 require "zlib"
 require "active_support/core_ext/module/attribute_accessors"
diff --git a/activerecord/lib/active_record/migration/command_recorder.rb b/activerecord/lib/active_record/migration/command_recorder.rb
index 1641044841..f9cf59b283 100644
--- a/activerecord/lib/active_record/migration/command_recorder.rb
+++ b/activerecord/lib/active_record/migration/command_recorder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Migration
     # <tt>ActiveRecord::Migration::CommandRecorder</tt> records commands done during
diff --git a/activerecord/lib/active_record/migration/compatibility.rb b/activerecord/lib/active_record/migration/compatibility.rb
index ccb1b2ddd7..188dd0acef 100644
--- a/activerecord/lib/active_record/migration/compatibility.rb
+++ b/activerecord/lib/active_record/migration/compatibility.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Migration
     module Compatibility # :nodoc: all
diff --git a/activerecord/lib/active_record/migration/join_table.rb b/activerecord/lib/active_record/migration/join_table.rb
index 026217880c..89789f00ea 100644
--- a/activerecord/lib/active_record/migration/join_table.rb
+++ b/activerecord/lib/active_record/migration/join_table.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Migration
     module JoinTable #:nodoc:
diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb
index e846bcc1a1..14e0f5bff7 100644
--- a/activerecord/lib/active_record/model_schema.rb
+++ b/activerecord/lib/active_record/model_schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "monitor"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb
index 43d4364e35..917bc76993 100644
--- a/activerecord/lib/active_record/nested_attributes.rb
+++ b/activerecord/lib/active_record/nested_attributes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/object/try"
 require "active_support/core_ext/hash/indifferent_access"
diff --git a/activerecord/lib/active_record/no_touching.rb b/activerecord/lib/active_record/no_touching.rb
index 84ee036c17..4059020e25 100644
--- a/activerecord/lib/active_record/no_touching.rb
+++ b/activerecord/lib/active_record/no_touching.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record No Touching
   module NoTouching
diff --git a/activerecord/lib/active_record/null_relation.rb b/activerecord/lib/active_record/null_relation.rb
index 6d65154a14..26966f9433 100644
--- a/activerecord/lib/active_record/null_relation.rb
+++ b/activerecord/lib/active_record/null_relation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module NullRelation # :nodoc:
     def pluck(*column_names)
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index c310ae3575..b2dba5516e 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record \Persistence
   module Persistence
diff --git a/activerecord/lib/active_record/query_cache.rb b/activerecord/lib/active_record/query_cache.rb
index 17e6bbfec0..e4c2e1f86f 100644
--- a/activerecord/lib/active_record/query_cache.rb
+++ b/activerecord/lib/active_record/query_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Query Cache
   class QueryCache
diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb
index dd7d833a96..b16e178358 100644
--- a/activerecord/lib/active_record/querying.rb
+++ b/activerecord/lib/active_record/querying.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Querying
     delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, :none?, :one?, to: :all
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 441dca9fe7..73518ca144 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record"
 require "rails"
 require "active_model/railtie"
diff --git a/activerecord/lib/active_record/railties/console_sandbox.rb b/activerecord/lib/active_record/railties/console_sandbox.rb
index 03286eacbb..604a220303 100644
--- a/activerecord/lib/active_record/railties/console_sandbox.rb
+++ b/activerecord/lib/active_record/railties/console_sandbox.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveRecord::Base.connection.begin_transaction(joinable: false)
 
 at_exit do
diff --git a/activerecord/lib/active_record/railties/controller_runtime.rb b/activerecord/lib/active_record/railties/controller_runtime.rb
index 297f3fc8bc..8658188623 100644
--- a/activerecord/lib/active_record/railties/controller_runtime.rb
+++ b/activerecord/lib/active_record/railties/controller_runtime.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attr_internal"
 require "active_record/log_subscriber"
 
diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake
index 7c0d066e88..711099e9e1 100644
--- a/activerecord/lib/active_record/railties/databases.rake
+++ b/activerecord/lib/active_record/railties/databases.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record"
 
 db_namespace = namespace :db do
diff --git a/activerecord/lib/active_record/railties/jdbcmysql_error.rb b/activerecord/lib/active_record/railties/jdbcmysql_error.rb
index f614c067d7..d7cf4df339 100644
--- a/activerecord/lib/active_record/railties/jdbcmysql_error.rb
+++ b/activerecord/lib/active_record/railties/jdbcmysql_error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #FIXME Remove if ArJdbcMysql will give.
 module ArJdbcMySQL #:nodoc:
   class Error < StandardError #:nodoc:
diff --git a/activerecord/lib/active_record/readonly_attributes.rb b/activerecord/lib/active_record/readonly_attributes.rb
index 7bf305eb31..af6473d250 100644
--- a/activerecord/lib/active_record/readonly_attributes.rb
+++ b/activerecord/lib/active_record/readonly_attributes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ReadonlyAttributes
     extend ActiveSupport::Concern
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 6318bff685..8ff2f50fdb 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 require "active_support/core_ext/string/filters"
 require "active_support/deprecation"
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index 55b59eeb54..52f5d5f3e3 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record \Relation
   class Relation
diff --git a/activerecord/lib/active_record/relation/batches.rb b/activerecord/lib/active_record/relation/batches.rb
index ac48ffb1bc..13a2c3f511 100644
--- a/activerecord/lib/active_record/relation/batches.rb
+++ b/activerecord/lib/active_record/relation/batches.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/relation/batches/batch_enumerator"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/relation/batches/batch_enumerator.rb b/activerecord/lib/active_record/relation/batches/batch_enumerator.rb
index 02c70d5cf0..3555779ec2 100644
--- a/activerecord/lib/active_record/relation/batches/batch_enumerator.rb
+++ b/activerecord/lib/active_record/relation/batches/batch_enumerator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Batches
     class BatchEnumerator
diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index 6514c7bde8..8a54f8f2c3 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Calculations
     # Count the records.
diff --git a/activerecord/lib/active_record/relation/delegation.rb b/activerecord/lib/active_record/relation/delegation.rb
index 6d3b59d339..48c4dcdef4 100644
--- a/activerecord/lib/active_record/relation/delegation.rb
+++ b/activerecord/lib/active_record/relation/delegation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Delegation # :nodoc:
     module DelegateCache # :nodoc:
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index 88c68685bc..eee0f36f63 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/relation/from_clause.rb b/activerecord/lib/active_record/relation/from_clause.rb
index ea838b79a6..8945cb0cc5 100644
--- a/activerecord/lib/active_record/relation/from_clause.rb
+++ b/activerecord/lib/active_record/relation/from_clause.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Relation
     class FromClause # :nodoc:
diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb
index 84c31e4126..5dac00724a 100644
--- a/activerecord/lib/active_record/relation/merger.rb
+++ b/activerecord/lib/active_record/relation/merger.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/relation/predicate_builder.rb b/activerecord/lib/active_record/relation/predicate_builder.rb
index 72314180dd..7dea5deec5 100644
--- a/activerecord/lib/active_record/relation/predicate_builder.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder # :nodoc:
     delegate :resolve_column_aliases, to: :table
diff --git a/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
index 4d0778df36..1068e700e2 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class ArrayHandler # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb b/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb
index 66690d6b5c..3e19646ae5 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/association_query_value.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class AssociationQueryValue # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/base_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/base_handler.rb
index 3472b16cef..3bb1037885 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/base_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/base_handler.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class BaseHandler # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/basic_object_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/basic_object_handler.rb
index 3190602506..79cde00303 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/basic_object_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/basic_object_handler.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class BasicObjectHandler # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb b/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb
index 5032177757..7029ae5f47 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_value.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class PolymorphicArrayValue # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/range_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/range_handler.rb
index ddd804b508..5db778e19c 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/range_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/range_handler.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class RangeHandler # :nodoc:
diff --git a/activerecord/lib/active_record/relation/predicate_builder/relation_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/relation_handler.rb
index 4e1e644599..8a910a82fe 100644
--- a/activerecord/lib/active_record/relation/predicate_builder/relation_handler.rb
+++ b/activerecord/lib/active_record/relation/predicate_builder/relation_handler.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class PredicateBuilder
     class RelationHandler # :nodoc:
diff --git a/activerecord/lib/active_record/relation/query_attribute.rb b/activerecord/lib/active_record/relation/query_attribute.rb
index 410a375e52..a68e508fcc 100644
--- a/activerecord/lib/active_record/relation/query_attribute.rb
+++ b/activerecord/lib/active_record/relation/query_attribute.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/attribute"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 4ddc933e3d..d44f6fd572 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/relation/from_clause"
 require "active_record/relation/query_attribute"
 require "active_record/relation/where_clause"
diff --git a/activerecord/lib/active_record/relation/record_fetch_warning.rb b/activerecord/lib/active_record/relation/record_fetch_warning.rb
index 8e221f1570..31544c730e 100644
--- a/activerecord/lib/active_record/relation/record_fetch_warning.rb
+++ b/activerecord/lib/active_record/relation/record_fetch_warning.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Relation
     module RecordFetchWarning
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index 8b7b01259e..ada89b5ec3 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/hash/slice"
 require "active_record/relation/merger"
diff --git a/activerecord/lib/active_record/relation/where_clause.rb b/activerecord/lib/active_record/relation/where_clause.rb
index a809752928..119910ee79 100644
--- a/activerecord/lib/active_record/relation/where_clause.rb
+++ b/activerecord/lib/active_record/relation/where_clause.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Relation
     class WhereClause # :nodoc:
diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb
index 156088f534..b862dd56a5 100644
--- a/activerecord/lib/active_record/relation/where_clause_factory.rb
+++ b/activerecord/lib/active_record/relation/where_clause_factory.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class Relation
     class WhereClauseFactory # :nodoc:
diff --git a/activerecord/lib/active_record/result.rb b/activerecord/lib/active_record/result.rb
index 5e1c0bfefc..26b1d48e9e 100644
--- a/activerecord/lib/active_record/result.rb
+++ b/activerecord/lib/active_record/result.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   ###
   # This class encapsulates a result returned from calling
diff --git a/activerecord/lib/active_record/runtime_registry.rb b/activerecord/lib/active_record/runtime_registry.rb
index d068d8898e..b79eb2263f 100644
--- a/activerecord/lib/active_record/runtime_registry.rb
+++ b/activerecord/lib/active_record/runtime_registry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/per_thread_registry"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/sanitization.rb b/activerecord/lib/active_record/sanitization.rb
index a39e1a2e73..64bda1539c 100644
--- a/activerecord/lib/active_record/sanitization.rb
+++ b/activerecord/lib/active_record/sanitization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Sanitization
     extend ActiveSupport::Concern
diff --git a/activerecord/lib/active_record/schema.rb b/activerecord/lib/active_record/schema.rb
index 2578c5e3ef..5104427339 100644
--- a/activerecord/lib/active_record/schema.rb
+++ b/activerecord/lib/active_record/schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record \Schema
   #
diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb
index 767da6816d..66a2846f3a 100644
--- a/activerecord/lib/active_record/schema_dumper.rb
+++ b/activerecord/lib/active_record/schema_dumper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "stringio"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/schema_migration.rb b/activerecord/lib/active_record/schema_migration.rb
index e6336dfde3..f59737afb0 100644
--- a/activerecord/lib/active_record/schema_migration.rb
+++ b/activerecord/lib/active_record/schema_migration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/scoping/default"
 require "active_record/scoping/named"
 
diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb
index c2cd35ee3b..94e0ef6724 100644
--- a/activerecord/lib/active_record/scoping.rb
+++ b/activerecord/lib/active_record/scoping.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/per_thread_registry"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/scoping/default.rb b/activerecord/lib/active_record/scoping/default.rb
index eeb89c405a..70b2693b28 100644
--- a/activerecord/lib/active_record/scoping/default.rb
+++ b/activerecord/lib/active_record/scoping/default.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Scoping
     module Default
diff --git a/activerecord/lib/active_record/scoping/named.rb b/activerecord/lib/active_record/scoping/named.rb
index c16cbce109..b4026fabb2 100644
--- a/activerecord/lib/active_record/scoping/named.rb
+++ b/activerecord/lib/active_record/scoping/named.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array"
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/kernel/singleton_class"
diff --git a/activerecord/lib/active_record/secure_token.rb b/activerecord/lib/active_record/secure_token.rb
index 3b2d7e10bd..115799cc20 100644
--- a/activerecord/lib/active_record/secure_token.rb
+++ b/activerecord/lib/active_record/secure_token.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module SecureToken
     extend ActiveSupport::Concern
diff --git a/activerecord/lib/active_record/serialization.rb b/activerecord/lib/active_record/serialization.rb
index 1907defb2e..db2bd0b55e 100644
--- a/activerecord/lib/active_record/serialization.rb
+++ b/activerecord/lib/active_record/serialization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord #:nodoc:
   # = Active Record \Serialization
   module Serialization
diff --git a/activerecord/lib/active_record/statement_cache.rb b/activerecord/lib/active_record/statement_cache.rb
index fd04f9aedb..1877489e55 100644
--- a/activerecord/lib/active_record/statement_cache.rb
+++ b/activerecord/lib/active_record/statement_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # Statement cache is used to cache a single statement in order to avoid creating the AST again.
   # Initializing the cache is done by passing the statement in the create block:
diff --git a/activerecord/lib/active_record/store.rb b/activerecord/lib/active_record/store.rb
index 37888c28b5..006afe7495 100644
--- a/activerecord/lib/active_record/store.rb
+++ b/activerecord/lib/active_record/store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/suppressor.rb b/activerecord/lib/active_record/suppressor.rb
index 02185c2e0b..d9acb1a1dc 100644
--- a/activerecord/lib/active_record/suppressor.rb
+++ b/activerecord/lib/active_record/suppressor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # ActiveRecord::Suppressor prevents the receiver from being saved during
   # a given block.
diff --git a/activerecord/lib/active_record/table_metadata.rb b/activerecord/lib/active_record/table_metadata.rb
index a5dd3008d0..71efc1829a 100644
--- a/activerecord/lib/active_record/table_metadata.rb
+++ b/activerecord/lib/active_record/table_metadata.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   class TableMetadata # :nodoc:
     delegate :foreign_type, :foreign_key, to: :association, prefix: true
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index bdfa683be4..ba686fc562 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Tasks # :nodoc:
     class DatabaseAlreadyExists < StandardError; end # :nodoc:
diff --git a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
index 730d077ecf..88cbd6f6f5 100644
--- a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Tasks # :nodoc:
     class MySQLDatabaseTasks # :nodoc:
diff --git a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb
index e49480b27b..7f1a768d8b 100644
--- a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "tempfile"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
index 559142b57a..01562b21e9 100644
--- a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Tasks # :nodoc:
     class SQLiteDatabaseTasks # :nodoc:
diff --git a/activerecord/lib/active_record/touch_later.rb b/activerecord/lib/active_record/touch_later.rb
index 1e484e59e3..cacde9c881 100644
--- a/activerecord/lib/active_record/touch_later.rb
+++ b/activerecord/lib/active_record/touch_later.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record Touch Later
   module TouchLater
diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb
index 4e8d2a44e1..45795fa287 100644
--- a/activerecord/lib/active_record/transactions.rb
+++ b/activerecord/lib/active_record/transactions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # See ActiveRecord::Transactions::ClassMethods for documentation.
   module Transactions
diff --git a/activerecord/lib/active_record/translation.rb b/activerecord/lib/active_record/translation.rb
index ecc508902c..ddcb5f2a7a 100644
--- a/activerecord/lib/active_record/translation.rb
+++ b/activerecord/lib/active_record/translation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Translation
     include ActiveModel::Translation
diff --git a/activerecord/lib/active_record/type.rb b/activerecord/lib/active_record/type.rb
index a179582e13..9ed6c95bf9 100644
--- a/activerecord/lib/active_record/type.rb
+++ b/activerecord/lib/active_record/type.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type"
 
 require "active_record/type/internal/timezone"
diff --git a/activerecord/lib/active_record/type/adapter_specific_registry.rb b/activerecord/lib/active_record/type/adapter_specific_registry.rb
index f24b9b9a36..7cc866f7a7 100644
--- a/activerecord/lib/active_record/type/adapter_specific_registry.rb
+++ b/activerecord/lib/active_record/type/adapter_specific_registry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_model/type/registry"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/type/date.rb b/activerecord/lib/active_record/type/date.rb
index f1a40a8a6b..ccafed054e 100644
--- a/activerecord/lib/active_record/type/date.rb
+++ b/activerecord/lib/active_record/type/date.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class Date < ActiveModel::Type::Date
diff --git a/activerecord/lib/active_record/type/date_time.rb b/activerecord/lib/active_record/type/date_time.rb
index dadd76dbe0..1fb9380ecd 100644
--- a/activerecord/lib/active_record/type/date_time.rb
+++ b/activerecord/lib/active_record/type/date_time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class DateTime < ActiveModel::Type::DateTime
diff --git a/activerecord/lib/active_record/type/decimal_without_scale.rb b/activerecord/lib/active_record/type/decimal_without_scale.rb
index ed0a4cfb23..53a5e205da 100644
--- a/activerecord/lib/active_record/type/decimal_without_scale.rb
+++ b/activerecord/lib/active_record/type/decimal_without_scale.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class DecimalWithoutScale < ActiveModel::Type::BigInteger # :nodoc:
diff --git a/activerecord/lib/active_record/type/hash_lookup_type_map.rb b/activerecord/lib/active_record/type/hash_lookup_type_map.rb
index 96b6297132..0145d5d6c1 100644
--- a/activerecord/lib/active_record/type/hash_lookup_type_map.rb
+++ b/activerecord/lib/active_record/type/hash_lookup_type_map.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class HashLookupTypeMap < TypeMap # :nodoc:
diff --git a/activerecord/lib/active_record/type/internal/timezone.rb b/activerecord/lib/active_record/type/internal/timezone.rb
index 0c7d8ed76e..947e06158a 100644
--- a/activerecord/lib/active_record/type/internal/timezone.rb
+++ b/activerecord/lib/active_record/type/internal/timezone.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     module Internal
diff --git a/activerecord/lib/active_record/type/json.rb b/activerecord/lib/active_record/type/json.rb
index 9aec74241b..c4732fe388 100644
--- a/activerecord/lib/active_record/type/json.rb
+++ b/activerecord/lib/active_record/type/json.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class Json < ActiveModel::Type::Value
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 96e7ad7152..edbd20a6c1 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class Serialized < DelegateClass(ActiveModel::Type::Value) # :nodoc:
diff --git a/activerecord/lib/active_record/type/text.rb b/activerecord/lib/active_record/type/text.rb
index 3d7dd630e3..cb1949700a 100644
--- a/activerecord/lib/active_record/type/text.rb
+++ b/activerecord/lib/active_record/type/text.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class Text < ActiveModel::Type::String # :nodoc:
diff --git a/activerecord/lib/active_record/type/time.rb b/activerecord/lib/active_record/type/time.rb
index 3ca7010c79..b9bac87c67 100644
--- a/activerecord/lib/active_record/type/time.rb
+++ b/activerecord/lib/active_record/type/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class Time < ActiveModel::Type::Time
diff --git a/activerecord/lib/active_record/type/type_map.rb b/activerecord/lib/active_record/type/type_map.rb
index f28caff991..7bce82a1ff 100644
--- a/activerecord/lib/active_record/type/type_map.rb
+++ b/activerecord/lib/active_record/type/type_map.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 
 module ActiveRecord
diff --git a/activerecord/lib/active_record/type/unsigned_integer.rb b/activerecord/lib/active_record/type/unsigned_integer.rb
index 45f5dc506e..9ae0109f9f 100644
--- a/activerecord/lib/active_record/type/unsigned_integer.rb
+++ b/activerecord/lib/active_record/type/unsigned_integer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Type
     class UnsignedInteger < ActiveModel::Type::Integer # :nodoc:
diff --git a/activerecord/lib/active_record/type_caster.rb b/activerecord/lib/active_record/type_caster.rb
index dbe91dc12b..f1686e4913 100644
--- a/activerecord/lib/active_record/type_caster.rb
+++ b/activerecord/lib/active_record/type_caster.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_record/type_caster/map"
 require "active_record/type_caster/connection"
 
diff --git a/activerecord/lib/active_record/type_caster/connection.rb b/activerecord/lib/active_record/type_caster/connection.rb
index 4f4570db58..9f7bbe8843 100644
--- a/activerecord/lib/active_record/type_caster/connection.rb
+++ b/activerecord/lib/active_record/type_caster/connection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module TypeCaster
     class Connection # :nodoc:
diff --git a/activerecord/lib/active_record/type_caster/map.rb b/activerecord/lib/active_record/type_caster/map.rb
index fd3477a826..9f79723125 100644
--- a/activerecord/lib/active_record/type_caster/map.rb
+++ b/activerecord/lib/active_record/type_caster/map.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module TypeCaster
     class Map # :nodoc:
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index 4727221774..9633f226f0 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   # = Active Record \RecordInvalid
   #
diff --git a/activerecord/lib/active_record/validations/absence.rb b/activerecord/lib/active_record/validations/absence.rb
index 57fbdb92ee..641d041f3d 100644
--- a/activerecord/lib/active_record/validations/absence.rb
+++ b/activerecord/lib/active_record/validations/absence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Validations
     class AbsenceValidator < ActiveModel::Validations::AbsenceValidator # :nodoc:
diff --git a/activerecord/lib/active_record/validations/associated.rb b/activerecord/lib/active_record/validations/associated.rb
index d7752b428b..c695965d7b 100644
--- a/activerecord/lib/active_record/validations/associated.rb
+++ b/activerecord/lib/active_record/validations/associated.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Validations
     class AssociatedValidator < ActiveModel::EachValidator #:nodoc:
diff --git a/activerecord/lib/active_record/validations/length.rb b/activerecord/lib/active_record/validations/length.rb
index 82a17b4807..0e0cebce4a 100644
--- a/activerecord/lib/active_record/validations/length.rb
+++ b/activerecord/lib/active_record/validations/length.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Validations
     class LengthValidator < ActiveModel::Validations::LengthValidator # :nodoc:
diff --git a/activerecord/lib/active_record/validations/presence.rb b/activerecord/lib/active_record/validations/presence.rb
index a8f8bc6b02..7cfd55f516 100644
--- a/activerecord/lib/active_record/validations/presence.rb
+++ b/activerecord/lib/active_record/validations/presence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Validations
     class PresenceValidator < ActiveModel::Validations::PresenceValidator # :nodoc:
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb
index 86eeb5d7c5..154cf5f1a4 100644
--- a/activerecord/lib/active_record/validations/uniqueness.rb
+++ b/activerecord/lib/active_record/validations/uniqueness.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module Validations
     class UniquenessValidator < ActiveModel::EachValidator # :nodoc:
diff --git a/activerecord/lib/active_record/version.rb b/activerecord/lib/active_record/version.rb
index 78e9169b2e..146cfacc18 100644
--- a/activerecord/lib/active_record/version.rb
+++ b/activerecord/lib/active_record/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActiveRecord
diff --git a/activerecord/lib/rails/generators/active_record.rb b/activerecord/lib/rails/generators/active_record.rb
index aaa2a14702..a79b8eafea 100644
--- a/activerecord/lib/rails/generators/active_record.rb
+++ b/activerecord/lib/rails/generators/active_record.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 require "rails/generators/active_model"
 require "rails/generators/active_record/migration"
diff --git a/activerecord/lib/rails/generators/active_record/migration.rb b/activerecord/lib/rails/generators/active_record/migration.rb
index 6d07438dcb..47c0981a49 100644
--- a/activerecord/lib/rails/generators/active_record/migration.rb
+++ b/activerecord/lib/rails/generators/active_record/migration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/migration"
 
 module ActiveRecord
diff --git a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
index 61f507ddb3..1f1c47499b 100644
--- a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/active_record"
 
 module ActiveRecord
diff --git a/activerecord/lib/rails/generators/active_record/model/model_generator.rb b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
index ee321089af..5cec07d2e3 100644
--- a/activerecord/lib/rails/generators/active_record/model/model_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/active_record"
 
 module ActiveRecord
diff --git a/activerecord/test/active_record/connection_adapters/fake_adapter.rb b/activerecord/test/active_record/connection_adapters/fake_adapter.rb
index 9391569f2f..b0d8050721 100644
--- a/activerecord/test/active_record/connection_adapters/fake_adapter.rb
+++ b/activerecord/test/active_record/connection_adapters/fake_adapter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ConnectionHandling
     def fake_connection(config)
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
index dd891cb2ed..a1fb6427f9 100644
--- a/activerecord/test/cases/adapter_test.rb
+++ b/activerecord/test/cases/adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/book"
 require "models/post"
diff --git a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
index fdf83aaf88..67e1efde27 100644
--- a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb b/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
index 9f3d1459f7..8f7c803a21 100644
--- a/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/adapters/mysql2/boolean_test.rb b/activerecord/test/cases/adapters/mysql2/boolean_test.rb
index 9267d15def..58698d59db 100644
--- a/activerecord/test/cases/adapters/mysql2/boolean_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/boolean_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mysql2BooleanTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
index 65dc369213..50ba9ab831 100644
--- a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mysql2CaseSensitivityTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb b/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
index e77f4a90d4..e4a6ed5482 100644
--- a/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/connection_test.rb b/activerecord/test/cases/adapters/mysql2/connection_test.rb
index c5ff145e74..a2faf43b0d 100644
--- a/activerecord/test/cases/adapters/mysql2/connection_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb b/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
index 86e72c149c..c131a5169c 100644
--- a/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mysql2DatetimePrecisionQuotingTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/enum_test.rb b/activerecord/test/cases/adapters/mysql2/enum_test.rb
index b811179c1b..7ad3e3ca2d 100644
--- a/activerecord/test/cases/adapters/mysql2/enum_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mysql2EnumTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/explain_test.rb b/activerecord/test/cases/adapters/mysql2/explain_test.rb
index 84c15af08d..7916921e5a 100644
--- a/activerecord/test/cases/adapters/mysql2/explain_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/adapters/mysql2/json_test.rb b/activerecord/test/cases/adapters/mysql2/json_test.rb
index 2d39db4ce2..26c69edc7b 100644
--- a/activerecord/test/cases/adapters/mysql2/json_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "cases/json_shared_test_cases"
 
diff --git a/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb b/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
index 7ba388bee1..565130c38f 100644
--- a/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/ddl_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
index 4a421e2b91..251a50e41e 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class SchemaMigrationsTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/schema_test.rb b/activerecord/test/cases/adapters/mysql2/schema_test.rb
index c4bf58c13e..1fad5585de 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/adapters/mysql2/sp_test.rb b/activerecord/test/cases/adapters/mysql2/sp_test.rb
index d4c4d02f79..4182532535 100644
--- a/activerecord/test/cases/adapters/mysql2/sp_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/sp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/adapters/mysql2/sql_types_test.rb b/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
index c412166451..d6e7f29a5c 100644
--- a/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mysql2SqlTypesTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/table_options_test.rb b/activerecord/test/cases/adapters/mysql2/table_options_test.rb
index 54da2195d1..61a8ce9bc0 100644
--- a/activerecord/test/cases/adapters/mysql2/table_options_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/table_options_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/transaction_test.rb b/activerecord/test/cases/adapters/mysql2/transaction_test.rb
index e447e6ec83..16101e38cb 100644
--- a/activerecord/test/cases/adapters/mysql2/transaction_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/transaction_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb b/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
index 1703e8fef7..71dcfaa241 100644
--- a/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
index 85e283bfe1..442a4fb7b5 100644
--- a/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/active_schema_test.rb b/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
index 441e84a117..b787de8453 100644
--- a/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlActiveSchemaTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index a642145726..121c62dadf 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
index d7ed0aa8dd..7712e809a2 100644
--- a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/bytea_test.rb b/activerecord/test/cases/adapters/postgresql/bytea_test.rb
index 39d76de770..65baed34e9 100644
--- a/activerecord/test/cases/adapters/postgresql/bytea_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/bytea_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb b/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
index b6db6e5e28..03b44feab6 100644
--- a/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlCaseInsensitiveTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/change_schema_test.rb b/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
index 9d7fddfc02..ea642069d2 100644
--- a/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/cidr_test.rb b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
index fccd8b3c7b..52f2a0096c 100644
--- a/activerecord/test/cases/adapters/postgresql/cidr_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "ipaddr"
 
diff --git a/activerecord/test/cases/adapters/postgresql/citext_test.rb b/activerecord/test/cases/adapters/postgresql/citext_test.rb
index ffdd2983c6..ca95e4b626 100644
--- a/activerecord/test/cases/adapters/postgresql/citext_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/citext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/collation_test.rb b/activerecord/test/cases/adapters/postgresql/collation_test.rb
index 2929c9ad94..a603221d8f 100644
--- a/activerecord/test/cases/adapters/postgresql/collation_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/composite_test.rb b/activerecord/test/cases/adapters/postgresql/composite_test.rb
index 9eb422a8a3..1da2a9e2ac 100644
--- a/activerecord/test/cases/adapters/postgresql/composite_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/composite_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/connection_test.rb b/activerecord/test/cases/adapters/postgresql/connection_test.rb
index 3adae7e146..32afe331fa 100644
--- a/activerecord/test/cases/adapters/postgresql/connection_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/datatype_test.rb b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
index f947868898..0725fde5ae 100644
--- a/activerecord/test/cases/adapters/postgresql/datatype_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/ddl_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/domain_test.rb b/activerecord/test/cases/adapters/postgresql/domain_test.rb
index b16e0f9265..f1eb8adb15 100644
--- a/activerecord/test/cases/adapters/postgresql/domain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/domain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/enum_test.rb b/activerecord/test/cases/adapters/postgresql/enum_test.rb
index 0f8ab8ab23..5e5a3158ba 100644
--- a/activerecord/test/cases/adapters/postgresql/enum_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/explain_test.rb b/activerecord/test/cases/adapters/postgresql/explain_test.rb
index 8a0cf440fd..d79fbccf47 100644
--- a/activerecord/test/cases/adapters/postgresql/explain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
index ba2b4e1fbf..b56c226763 100644
--- a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlExtensionMigrationTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/full_text_test.rb b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
index fa8aadd224..5ddfe32007 100644
--- a/activerecord/test/cases/adapters/postgresql/full_text_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/geometric_test.rb b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
index 34836b2421..3b6840a1c9 100644
--- a/activerecord/test/cases/adapters/postgresql/geometric_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/hstore_test.rb b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
index b547868b57..f9cce10fb8 100644
--- a/activerecord/test/cases/adapters/postgresql/hstore_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/infinity_test.rb b/activerecord/test/cases/adapters/postgresql/infinity_test.rb
index df5c688881..b9e177e6ec 100644
--- a/activerecord/test/cases/adapters/postgresql/infinity_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/infinity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlInfinityTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/integer_test.rb b/activerecord/test/cases/adapters/postgresql/integer_test.rb
index 5557e869ad..b4e55964b9 100644
--- a/activerecord/test/cases/adapters/postgresql/integer_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/numeric/bytes"
 
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
index 4438f349cc..6aa60630c2 100644
--- a/activerecord/test/cases/adapters/postgresql/json_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "cases/json_shared_test_cases"
 
diff --git a/activerecord/test/cases/adapters/postgresql/ltree_test.rb b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
index 447d68316c..2b5ac1cac6 100644
--- a/activerecord/test/cases/adapters/postgresql/ltree_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/money_test.rb b/activerecord/test/cases/adapters/postgresql/money_test.rb
index f5c50a80c2..ea060345a7 100644
--- a/activerecord/test/cases/adapters/postgresql/money_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/money_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/network_test.rb b/activerecord/test/cases/adapters/postgresql/network_test.rb
index 2bbfb292c4..a33b0ef8a7 100644
--- a/activerecord/test/cases/adapters/postgresql/network_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/network_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/numbers_test.rb b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
index 82edf7db3f..bfb2b7c27a 100644
--- a/activerecord/test/cases/adapters/postgresql/numbers_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlNumberTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb b/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
index 7c7bb0a942..76e0ad60fe 100644
--- a/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/ddl_helper"
 require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb b/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
index 0120e33f70..8c62690866 100644
--- a/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/computer"
 require "models/developer"
diff --git a/activerecord/test/cases/adapters/postgresql/quoting_test.rb b/activerecord/test/cases/adapters/postgresql/quoting_test.rb
index 1205559558..a1e966b915 100644
--- a/activerecord/test/cases/adapters/postgresql/quoting_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/range_test.rb b/activerecord/test/cases/adapters/postgresql/range_test.rb
index 8de162a8a1..f411884dfd 100644
--- a/activerecord/test/cases/adapters/postgresql/range_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/range_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
index 0b17c141c8..0ff04bfa27 100644
--- a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/rename_table_test.rb b/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
index 5b253999d5..e9e7f717ac 100644
--- a/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlRenameTableTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
index db7d8ba751..f86a76e08a 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class SchemaThing < ActiveRecord::Base
diff --git a/activerecord/test/cases/adapters/postgresql/schema_test.rb b/activerecord/test/cases/adapters/postgresql/schema_test.rb
index 5438665d42..f6b957476b 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/default"
 require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/serial_test.rb b/activerecord/test/cases/adapters/postgresql/serial_test.rb
index 4930d3f67a..d711b3b729 100644
--- a/activerecord/test/cases/adapters/postgresql/serial_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/serial_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb b/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
index 73cf91425b..146b619a4b 100644
--- a/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
index c7dec25f3a..962450aada 100644
--- a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/topic"
diff --git a/activerecord/test/cases/adapters/postgresql/transaction_test.rb b/activerecord/test/cases/adapters/postgresql/transaction_test.rb
index c1b19c11f5..9b42d0383d 100644
--- a/activerecord/test/cases/adapters/postgresql/transaction_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/transaction_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 require "concurrent/atomic/cyclic_barrier"
diff --git a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
index 688117722b..784d77a8d1 100644
--- a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class PostgresqlTypeLookupTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/utils_test.rb b/activerecord/test/cases/adapters/postgresql/utils_test.rb
index 1a655d7843..9f9e3bda2f 100644
--- a/activerecord/test/cases/adapters/postgresql/utils_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/utils_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/connection_adapters/postgresql/utils"
 
diff --git a/activerecord/test/cases/adapters/postgresql/uuid_test.rb b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
index 49c570c917..8eddd81c38 100644
--- a/activerecord/test/cases/adapters/postgresql/uuid_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/postgresql/xml_test.rb b/activerecord/test/cases/adapters/postgresql/xml_test.rb
index b0720b5a6e..826b384fb3 100644
--- a/activerecord/test/cases/adapters/postgresql/xml_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/xml_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/sqlite3/collation_test.rb b/activerecord/test/cases/adapters/sqlite3/collation_test.rb
index f3cbb408f1..dd88ed3656 100644
--- a/activerecord/test/cases/adapters/sqlite3/collation_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb b/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
index cc1f74ed41..e1cfd703e8 100644
--- a/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class CopyTableTest < ActiveRecord::SQLite3TestCase
diff --git a/activerecord/test/cases/adapters/sqlite3/explain_test.rb b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
index a3f6299756..29d97ae78c 100644
--- a/activerecord/test/cases/adapters/sqlite3/explain_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/adapters/sqlite3/quoting_test.rb b/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
index 0a5bf7754c..aefbb309e6 100644
--- a/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "bigdecimal"
 require "securerandom"
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
index bc6605682c..cf0c37f70c 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/owner"
 require "tempfile"
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
index d23a7ac532..b1b4463bf1 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/owner"
 
diff --git a/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb b/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
index 76841c235a..37ff973397 100644
--- a/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class SQLite3StatementPoolTest < ActiveRecord::SQLite3TestCase
diff --git a/activerecord/test/cases/aggregations_test.rb b/activerecord/test/cases/aggregations_test.rb
index 97be9c447a..f8136fde72 100644
--- a/activerecord/test/cases/aggregations_test.rb
+++ b/activerecord/test/cases/aggregations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/customer"
 
diff --git a/activerecord/test/cases/ar_schema_test.rb b/activerecord/test/cases/ar_schema_test.rb
index aaae3736a9..5b608d8e83 100644
--- a/activerecord/test/cases/ar_schema_test.rb
+++ b/activerecord/test/cases/ar_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ActiveRecordSchemaTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/association_scope_test.rb b/activerecord/test/cases/associations/association_scope_test.rb
index a57eb78a14..c54542ff7b 100644
--- a/activerecord/test/cases/associations/association_scope_test.rb
+++ b/activerecord/test/cases/associations/association_scope_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/author"
diff --git a/activerecord/test/cases/associations/belongs_to_associations_test.rb b/activerecord/test/cases/associations/belongs_to_associations_test.rb
index af3f40974d..a727cc6e60 100644
--- a/activerecord/test/cases/associations/belongs_to_associations_test.rb
+++ b/activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/project"
diff --git a/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb b/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
index eee327a0bc..8a0e041864 100644
--- a/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
+++ b/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/content"
 
diff --git a/activerecord/test/cases/associations/callbacks_test.rb b/activerecord/test/cases/associations/callbacks_test.rb
index b91fb5b7ed..f9d1e44595 100644
--- a/activerecord/test/cases/associations/callbacks_test.rb
+++ b/activerecord/test/cases/associations/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/author"
diff --git a/activerecord/test/cases/associations/cascaded_eager_loading_test.rb b/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
index ea2582b507..7b0445025c 100644
--- a/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
+++ b/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb b/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
index f6de62b1af..61f39b4136 100644
--- a/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
+++ b/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/tagging"
diff --git a/activerecord/test/cases/associations/eager_load_nested_include_test.rb b/activerecord/test/cases/associations/eager_load_nested_include_test.rb
index 83c85cd022..e9f551b6b2 100644
--- a/activerecord/test/cases/associations/eager_load_nested_include_test.rb
+++ b/activerecord/test/cases/associations/eager_load_nested_include_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/tag"
diff --git a/activerecord/test/cases/associations/eager_singularization_test.rb b/activerecord/test/cases/associations/eager_singularization_test.rb
index 860bb9ac54..16eff15026 100644
--- a/activerecord/test/cases/associations/eager_singularization_test.rb
+++ b/activerecord/test/cases/associations/eager_singularization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class EagerSingularizationTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb
index e0b137304b..55b294cfaa 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/tagging"
diff --git a/activerecord/test/cases/associations/extension_test.rb b/activerecord/test/cases/associations/extension_test.rb
index d2f21583a7..f707a170f5 100644
--- a/activerecord/test/cases/associations/extension_test.rb
+++ b/activerecord/test/cases/associations/extension_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
index fa40bd2ff8..f73005b3cb 100644
--- a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/associations/has_many_associations_test.rb b/activerecord/test/cases/associations/has_many_associations_test.rb
index 5ad1e2aecc..a7e16af88d 100644
--- a/activerecord/test/cases/associations/has_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index 6794428688..1c2138a3d0 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/person"
diff --git a/activerecord/test/cases/associations/has_one_associations_test.rb b/activerecord/test/cases/associations/has_one_associations_test.rb
index 545eec7e5d..bf3b8dcd63 100644
--- a/activerecord/test/cases/associations/has_one_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/associations/has_one_through_associations_test.rb b/activerecord/test/cases/associations/has_one_through_associations_test.rb
index 0a74a9e710..28b883586d 100644
--- a/activerecord/test/cases/associations/has_one_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/club"
 require "models/member_type"
diff --git a/activerecord/test/cases/associations/inner_join_association_test.rb b/activerecord/test/cases/associations/inner_join_association_test.rb
index 6fff4171c8..ddf5bc6f0b 100644
--- a/activerecord/test/cases/associations/inner_join_association_test.rb
+++ b/activerecord/test/cases/associations/inner_join_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/associations/inverse_associations_test.rb b/activerecord/test/cases/associations/inverse_associations_test.rb
index 95ba6bdf8a..8e3087e7ca 100644
--- a/activerecord/test/cases/associations/inverse_associations_test.rb
+++ b/activerecord/test/cases/associations/inverse_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/man"
 require "models/face"
diff --git a/activerecord/test/cases/associations/join_model_test.rb b/activerecord/test/cases/associations/join_model_test.rb
index c2758b30a1..c078cef064 100644
--- a/activerecord/test/cases/associations/join_model_test.rb
+++ b/activerecord/test/cases/associations/join_model_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/tag"
 require "models/tagging"
diff --git a/activerecord/test/cases/associations/left_outer_join_association_test.rb b/activerecord/test/cases/associations/left_outer_join_association_test.rb
index 68c9286972..6d3757f467 100644
--- a/activerecord/test/cases/associations/left_outer_join_association_test.rb
+++ b/activerecord/test/cases/associations/left_outer_join_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/associations/nested_through_associations_test.rb b/activerecord/test/cases/associations/nested_through_associations_test.rb
index 90b2d4bc07..67ff7355b3 100644
--- a/activerecord/test/cases/associations/nested_through_associations_test.rb
+++ b/activerecord/test/cases/associations/nested_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/post"
diff --git a/activerecord/test/cases/associations/required_test.rb b/activerecord/test/cases/associations/required_test.rb
index 6cf2d8ac12..45e1803858 100644
--- a/activerecord/test/cases/associations/required_test.rb
+++ b/activerecord/test/cases/associations/required_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class RequiredAssociationsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index ba2f4c11c8..2eb31326a5 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/computer"
 require "models/developer"
diff --git a/activerecord/test/cases/attribute_decorators_test.rb b/activerecord/test/cases/attribute_decorators_test.rb
index eb8efab6a5..cfa6ed1da6 100644
--- a/activerecord/test/cases/attribute_decorators_test.rb
+++ b/activerecord/test/cases/attribute_decorators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/attribute_methods/read_test.rb b/activerecord/test/cases/attribute_methods/read_test.rb
index a366144e17..1fc63a49d4 100644
--- a/activerecord/test/cases/attribute_methods/read_test.rb
+++ b/activerecord/test/cases/attribute_methods/read_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb
index 1f3a3652d7..4d24a980dc 100644
--- a/activerecord/test/cases/attribute_methods_test.rb
+++ b/activerecord/test/cases/attribute_methods_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/minimalistic"
 require "models/developer"
diff --git a/activerecord/test/cases/attribute_set_test.rb b/activerecord/test/cases/attribute_set_test.rb
index 80c67f171b..bd4b200735 100644
--- a/activerecord/test/cases/attribute_set_test.rb
+++ b/activerecord/test/cases/attribute_set_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/attribute_test.rb b/activerecord/test/cases/attribute_test.rb
index ed9fb1b57b..e856d551c0 100644
--- a/activerecord/test/cases/attribute_test.rb
+++ b/activerecord/test/cases/attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/attributes_test.rb b/activerecord/test/cases/attributes_test.rb
index 8aa515fe6e..3705a6be89 100644
--- a/activerecord/test/cases/attributes_test.rb
+++ b/activerecord/test/cases/attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class OverloadedType < ActiveRecord::Base
diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index db2a19ea62..2203aa1788 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/bird"
 require "models/post"
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index a26a4bbb61..dc32e995a4 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/author"
diff --git a/activerecord/test/cases/batches_test.rb b/activerecord/test/cases/batches_test.rb
index beae679542..1a66b82b2e 100644
--- a/activerecord/test/cases/batches_test.rb
+++ b/activerecord/test/cases/batches_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/subscriber"
diff --git a/activerecord/test/cases/binary_test.rb b/activerecord/test/cases/binary_test.rb
index 89301563f9..f6ac7990d1 100644
--- a/activerecord/test/cases/binary_test.rb
+++ b/activerecord/test/cases/binary_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 # Without using prepared statements, it makes no sense to test
diff --git a/activerecord/test/cases/bind_parameter_test.rb b/activerecord/test/cases/bind_parameter_test.rb
index 8504f586cc..5af44c27eb 100644
--- a/activerecord/test/cases/bind_parameter_test.rb
+++ b/activerecord/test/cases/bind_parameter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/author"
diff --git a/activerecord/test/cases/cache_key_test.rb b/activerecord/test/cases/cache_key_test.rb
index f0a1bb9e22..7b8264e6e8 100644
--- a/activerecord/test/cases/cache_key_test.rb
+++ b/activerecord/test/cases/cache_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb
index 478b9fe742..80baaac30a 100644
--- a/activerecord/test/cases/calculations_test.rb
+++ b/activerecord/test/cases/calculations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/book"
 require "models/club"
diff --git a/activerecord/test/cases/callbacks_test.rb b/activerecord/test/cases/callbacks_test.rb
index 55deaa6947..b3c86586d0 100644
--- a/activerecord/test/cases/callbacks_test.rb
+++ b/activerecord/test/cases/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/developer"
 require "models/computer"
diff --git a/activerecord/test/cases/clone_test.rb b/activerecord/test/cases/clone_test.rb
index fa0f53676e..b89294c094 100644
--- a/activerecord/test/cases/clone_test.rb
+++ b/activerecord/test/cases/clone_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/coders/json_test.rb b/activerecord/test/cases/coders/json_test.rb
index 95e6fb3e7b..d22d93d129 100644
--- a/activerecord/test/cases/coders/json_test.rb
+++ b/activerecord/test/cases/coders/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/coders/yaml_column_test.rb b/activerecord/test/cases/coders/yaml_column_test.rb
index e3e85a58a4..a26a72712d 100644
--- a/activerecord/test/cases/coders/yaml_column_test.rb
+++ b/activerecord/test/cases/coders/yaml_column_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/collection_cache_key_test.rb b/activerecord/test/cases/collection_cache_key_test.rb
index 2d10a68416..f344c77691 100644
--- a/activerecord/test/cases/collection_cache_key_test.rb
+++ b/activerecord/test/cases/collection_cache_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/computer"
 require "models/developer"
diff --git a/activerecord/test/cases/column_alias_test.rb b/activerecord/test/cases/column_alias_test.rb
index 506ae05756..9893ba9580 100644
--- a/activerecord/test/cases/column_alias_test.rb
+++ b/activerecord/test/cases/column_alias_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/column_definition_test.rb b/activerecord/test/cases/column_definition_test.rb
index fcb0952c1c..90c8d21c43 100644
--- a/activerecord/test/cases/column_definition_test.rb
+++ b/activerecord/test/cases/column_definition_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/comment_test.rb b/activerecord/test/cases/comment_test.rb
index 5c91ac347c..c23be52a6c 100644
--- a/activerecord/test/cases/comment_test.rb
+++ b/activerecord/test/cases/comment_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb b/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
index 4f88b129af..64189381cb 100644
--- a/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
+++ b/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/connection_handler_test.rb b/activerecord/test/cases/connection_adapters/connection_handler_test.rb
index f8725ddb01..2a71f08d90 100644
--- a/activerecord/test/cases/connection_adapters/connection_handler_test.rb
+++ b/activerecord/test/cases/connection_adapters/connection_handler_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/connection_specification_test.rb b/activerecord/test/cases/connection_adapters/connection_specification_test.rb
index 40998c06bf..10a3521c79 100644
--- a/activerecord/test/cases/connection_adapters/connection_specification_test.rb
+++ b/activerecord/test/cases/connection_adapters/connection_specification_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
index 7c98c80e39..8faa67255d 100644
--- a/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
+++ b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
index 133632bac9..3657b8340d 100644
--- a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 if current_adapter?(:Mysql2Adapter)
diff --git a/activerecord/test/cases/connection_adapters/schema_cache_test.rb b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
index 3370818616..106323ccc9 100644
--- a/activerecord/test/cases/connection_adapters/schema_cache_test.rb
+++ b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/type_lookup_test.rb b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
index 251483da44..a348c2d783 100644
--- a/activerecord/test/cases/connection_adapters/type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 unless current_adapter?(:PostgreSQLAdapter) # PostgreSQL does not use type strings for lookup
diff --git a/activerecord/test/cases/connection_management_test.rb b/activerecord/test/cases/connection_management_test.rb
index 9bd0aab981..d1e946d401 100644
--- a/activerecord/test/cases/connection_management_test.rb
+++ b/activerecord/test/cases/connection_management_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "rack"
 
diff --git a/activerecord/test/cases/connection_pool_test.rb b/activerecord/test/cases/connection_pool_test.rb
index adbd158e7a..00a0187b57 100644
--- a/activerecord/test/cases/connection_pool_test.rb
+++ b/activerecord/test/cases/connection_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "concurrent/atomic/count_down_latch"
 
diff --git a/activerecord/test/cases/connection_specification/resolver_test.rb b/activerecord/test/cases/connection_specification/resolver_test.rb
index 3d97281627..13b5bae13c 100644
--- a/activerecord/test/cases/connection_specification/resolver_test.rb
+++ b/activerecord/test/cases/connection_specification/resolver_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/core_test.rb b/activerecord/test/cases/core_test.rb
index 5cf962c39d..936f26ce04 100644
--- a/activerecord/test/cases/core_test.rb
+++ b/activerecord/test/cases/core_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/person"
 require "models/topic"
diff --git a/activerecord/test/cases/counter_cache_test.rb b/activerecord/test/cases/counter_cache_test.rb
index 14800e6b91..46d7526cc0 100644
--- a/activerecord/test/cases/counter_cache_test.rb
+++ b/activerecord/test/cases/counter_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/car"
diff --git a/activerecord/test/cases/custom_locking_test.rb b/activerecord/test/cases/custom_locking_test.rb
index e170843952..15c8b684e4 100644
--- a/activerecord/test/cases/custom_locking_test.rb
+++ b/activerecord/test/cases/custom_locking_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/person"
 
diff --git a/activerecord/test/cases/database_statements_test.rb b/activerecord/test/cases/database_statements_test.rb
index 5df028d397..66035865be 100644
--- a/activerecord/test/cases/database_statements_test.rb
+++ b/activerecord/test/cases/database_statements_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class DatabaseStatementsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/date_test.rb b/activerecord/test/cases/date_test.rb
index 202100ff69..2edc0415cd 100644
--- a/activerecord/test/cases/date_test.rb
+++ b/activerecord/test/cases/date_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/date_time_precision_test.rb b/activerecord/test/cases/date_time_precision_test.rb
index 12b1858991..e4a2f9ee17 100644
--- a/activerecord/test/cases/date_time_precision_test.rb
+++ b/activerecord/test/cases/date_time_precision_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/date_time_test.rb b/activerecord/test/cases/date_time_test.rb
index 8753c95641..ad7da9de70 100644
--- a/activerecord/test/cases/date_time_test.rb
+++ b/activerecord/test/cases/date_time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/task"
diff --git a/activerecord/test/cases/defaults_test.rb b/activerecord/test/cases/defaults_test.rb
index 30cfa0744f..996d298689 100644
--- a/activerecord/test/cases/defaults_test.rb
+++ b/activerecord/test/cases/defaults_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 require "models/default"
diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index cc2724502b..f72e0d2ead 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"    # For booleans
 require "models/pirate"   # For timestamps
diff --git a/activerecord/test/cases/disconnected_test.rb b/activerecord/test/cases/disconnected_test.rb
index 92365351b1..c25089a420 100644
--- a/activerecord/test/cases/disconnected_test.rb
+++ b/activerecord/test/cases/disconnected_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class TestRecord < ActiveRecord::Base
diff --git a/activerecord/test/cases/dup_test.rb b/activerecord/test/cases/dup_test.rb
index 76979dc798..000ed27efb 100644
--- a/activerecord/test/cases/dup_test.rb
+++ b/activerecord/test/cases/dup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/reply"
 require "models/topic"
diff --git a/activerecord/test/cases/enum_test.rb b/activerecord/test/cases/enum_test.rb
index 8e13582f3e..4ef9a125e6 100644
--- a/activerecord/test/cases/enum_test.rb
+++ b/activerecord/test/cases/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/book"
diff --git a/activerecord/test/cases/errors_test.rb b/activerecord/test/cases/errors_test.rb
index 45e28c4f03..e90669e0c7 100644
--- a/activerecord/test/cases/errors_test.rb
+++ b/activerecord/test/cases/errors_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ErrorsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/explain_subscriber_test.rb b/activerecord/test/cases/explain_subscriber_test.rb
index 0fb6bf2eed..ca87e04012 100644
--- a/activerecord/test/cases/explain_subscriber_test.rb
+++ b/activerecord/test/cases/explain_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/explain_subscriber"
 require "active_record/explain_registry"
diff --git a/activerecord/test/cases/explain_test.rb b/activerecord/test/cases/explain_test.rb
index de3ec36667..4f6bd9327c 100644
--- a/activerecord/test/cases/explain_test.rb
+++ b/activerecord/test/cases/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/car"
 require "active_support/core_ext/string/strip"
diff --git a/activerecord/test/cases/finder_respond_to_test.rb b/activerecord/test/cases/finder_respond_to_test.rb
index 29d7dee343..3eaa993d45 100644
--- a/activerecord/test/cases/finder_respond_to_test.rb
+++ b/activerecord/test/cases/finder_respond_to_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index 752ac519a4..420f552ef6 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/author"
diff --git a/activerecord/test/cases/fixture_set/file_test.rb b/activerecord/test/cases/fixture_set/file_test.rb
index c7058133b2..533edcc2e0 100644
--- a/activerecord/test/cases/fixture_set/file_test.rb
+++ b/activerecord/test/cases/fixture_set/file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "tempfile"
 
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 91d0908450..b499e60922 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/admin"
 require "models/admin/account"
diff --git a/activerecord/test/cases/forbidden_attributes_protection_test.rb b/activerecord/test/cases/forbidden_attributes_protection_test.rb
index d11ec08dea..ffa3f63e0d 100644
--- a/activerecord/test/cases/forbidden_attributes_protection_test.rb
+++ b/activerecord/test/cases/forbidden_attributes_protection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_support/core_ext/hash/indifferent_access"
 
diff --git a/activerecord/test/cases/habtm_destroy_order_test.rb b/activerecord/test/cases/habtm_destroy_order_test.rb
index 124e3216d0..365d4576dd 100644
--- a/activerecord/test/cases/habtm_destroy_order_test.rb
+++ b/activerecord/test/cases/habtm_destroy_order_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/lesson"
 require "models/student"
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index 84a784e6d5..5a3b8e3fb5 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "config"
 
 require "stringio"
diff --git a/activerecord/test/cases/hot_compatibility_test.rb b/activerecord/test/cases/hot_compatibility_test.rb
index 970ccc3601..e107ff2362 100644
--- a/activerecord/test/cases/hot_compatibility_test.rb
+++ b/activerecord/test/cases/hot_compatibility_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/connection_helper"
 
diff --git a/activerecord/test/cases/i18n_test.rb b/activerecord/test/cases/i18n_test.rb
index 94b5e4ef2f..7f03c5b23d 100644
--- a/activerecord/test/cases/i18n_test.rb
+++ b/activerecord/test/cases/i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/inheritance_test.rb b/activerecord/test/cases/inheritance_test.rb
index e73d9d0a27..fb5a7bcc31 100644
--- a/activerecord/test/cases/inheritance_test.rb
+++ b/activerecord/test/cases/inheritance_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/company"
diff --git a/activerecord/test/cases/integration_test.rb b/activerecord/test/cases/integration_test.rb
index 1075366fb1..9104976126 100644
--- a/activerecord/test/cases/integration_test.rb
+++ b/activerecord/test/cases/integration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/company"
 require "models/developer"
diff --git a/activerecord/test/cases/invalid_connection_test.rb b/activerecord/test/cases/invalid_connection_test.rb
index 256ad59407..1367af2859 100644
--- a/activerecord/test/cases/invalid_connection_test.rb
+++ b/activerecord/test/cases/invalid_connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 if current_adapter?(:Mysql2Adapter)
diff --git a/activerecord/test/cases/invertible_migration_test.rb b/activerecord/test/cases/invertible_migration_test.rb
index a44a351209..cc3951e2ba 100644
--- a/activerecord/test/cases/invertible_migration_test.rb
+++ b/activerecord/test/cases/invertible_migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Horse < ActiveRecord::Base
diff --git a/activerecord/test/cases/json_attribute_test.rb b/activerecord/test/cases/json_attribute_test.rb
index c64e2c31de..e5848b45f8 100644
--- a/activerecord/test/cases/json_attribute_test.rb
+++ b/activerecord/test/cases/json_attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "cases/json_shared_test_cases"
 
diff --git a/activerecord/test/cases/json_serialization_test.rb b/activerecord/test/cases/json_serialization_test.rb
index 2ca95fe3b4..9b4b61b16e 100644
--- a/activerecord/test/cases/json_serialization_test.rb
+++ b/activerecord/test/cases/json_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/contact"
 require "models/post"
diff --git a/activerecord/test/cases/json_shared_test_cases.rb b/activerecord/test/cases/json_shared_test_cases.rb
index 1eeefb78dd..9a1c1c3f3f 100644
--- a/activerecord/test/cases/json_shared_test_cases.rb
+++ b/activerecord/test/cases/json_shared_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "support/schema_dumping_helper"
 
 module JSONSharedTestCases
diff --git a/activerecord/test/cases/locking_test.rb b/activerecord/test/cases/locking_test.rb
index e67ec22c42..2fc52393f2 100644
--- a/activerecord/test/cases/locking_test.rb
+++ b/activerecord/test/cases/locking_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 require "cases/helper"
 require "models/person"
diff --git a/activerecord/test/cases/log_subscriber_test.rb b/activerecord/test/cases/log_subscriber_test.rb
index 0eaca0d001..b80257962c 100644
--- a/activerecord/test/cases/log_subscriber_test.rb
+++ b/activerecord/test/cases/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/binary"
 require "models/developer"
diff --git a/activerecord/test/cases/migration/change_schema_test.rb b/activerecord/test/cases/migration/change_schema_test.rb
index e706fc4f08..1d305fa11f 100644
--- a/activerecord/test/cases/migration/change_schema_test.rb
+++ b/activerecord/test/cases/migration/change_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/change_table_test.rb b/activerecord/test/cases/migration/change_table_test.rb
index f1ca91887b..ec817a579b 100644
--- a/activerecord/test/cases/migration/change_table_test.rb
+++ b/activerecord/test/cases/migration/change_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/migration/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/column_attributes_test.rb b/activerecord/test/cases/migration/column_attributes_test.rb
index 5ef0847a64..48df931543 100644
--- a/activerecord/test/cases/migration/column_attributes_test.rb
+++ b/activerecord/test/cases/migration/column_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/migration/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/column_positioning_test.rb b/activerecord/test/cases/migration/column_positioning_test.rb
index bdbad431e8..f2162d91b1 100644
--- a/activerecord/test/cases/migration/column_positioning_test.rb
+++ b/activerecord/test/cases/migration/column_positioning_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/columns_test.rb b/activerecord/test/cases/migration/columns_test.rb
index c4751277f7..2329888345 100644
--- a/activerecord/test/cases/migration/columns_test.rb
+++ b/activerecord/test/cases/migration/columns_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/migration/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/command_recorder_test.rb b/activerecord/test/cases/migration/command_recorder_test.rb
index be200a7225..007926f1b9 100644
--- a/activerecord/test/cases/migration/command_recorder_test.rb
+++ b/activerecord/test/cases/migration/command_recorder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/compatibility_test.rb b/activerecord/test/cases/migration/compatibility_test.rb
index 4321f967d2..596a21dcbc 100644
--- a/activerecord/test/cases/migration/compatibility_test.rb
+++ b/activerecord/test/cases/migration/compatibility_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/migration/create_join_table_test.rb b/activerecord/test/cases/migration/create_join_table_test.rb
index 0e9e880fe1..c4896f3d6e 100644
--- a/activerecord/test/cases/migration/create_join_table_test.rb
+++ b/activerecord/test/cases/migration/create_join_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/foreign_key_test.rb b/activerecord/test/cases/migration/foreign_key_test.rb
index 7a44b2db75..7762d37915 100644
--- a/activerecord/test/cases/migration/foreign_key_test.rb
+++ b/activerecord/test/cases/migration/foreign_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/migration/helper.rb b/activerecord/test/cases/migration/helper.rb
index e366ed92b1..9c0fa7339d 100644
--- a/activerecord/test/cases/migration/helper.rb
+++ b/activerecord/test/cases/migration/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/index_test.rb b/activerecord/test/cases/migration/index_test.rb
index ccc0f4948f..f10fcf1398 100644
--- a/activerecord/test/cases/migration/index_test.rb
+++ b/activerecord/test/cases/migration/index_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/logger_test.rb b/activerecord/test/cases/migration/logger_test.rb
index 9fe64b73a8..3d7c7ad469 100644
--- a/activerecord/test/cases/migration/logger_test.rb
+++ b/activerecord/test/cases/migration/logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/pending_migrations_test.rb b/activerecord/test/cases/migration/pending_migrations_test.rb
index 0cb4b6cfa1..6970fdcc87 100644
--- a/activerecord/test/cases/migration/pending_migrations_test.rb
+++ b/activerecord/test/cases/migration/pending_migrations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/references_foreign_key_test.rb b/activerecord/test/cases/migration/references_foreign_key_test.rb
index 405fd7aaed..718b9a0613 100644
--- a/activerecord/test/cases/migration/references_foreign_key_test.rb
+++ b/activerecord/test/cases/migration/references_foreign_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 if ActiveRecord::Base.connection.supports_foreign_keys_in_create?
diff --git a/activerecord/test/cases/migration/references_index_test.rb b/activerecord/test/cases/migration/references_index_test.rb
index 2954f1e275..2866cabab6 100644
--- a/activerecord/test/cases/migration/references_index_test.rb
+++ b/activerecord/test/cases/migration/references_index_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/references_statements_test.rb b/activerecord/test/cases/migration/references_statements_test.rb
index f8b373bdee..e9eb9968cb 100644
--- a/activerecord/test/cases/migration/references_statements_test.rb
+++ b/activerecord/test/cases/migration/references_statements_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/migration/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration/rename_table_test.rb b/activerecord/test/cases/migration/rename_table_test.rb
index bee528ca8a..5da3ad33a3 100644
--- a/activerecord/test/cases/migration/rename_table_test.rb
+++ b/activerecord/test/cases/migration/rename_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/migration/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/migration_test.rb b/activerecord/test/cases/migration_test.rb
index 315e58668a..3a49a41580 100644
--- a/activerecord/test/cases/migration_test.rb
+++ b/activerecord/test/cases/migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "cases/migration/helper"
 require "bigdecimal/util"
diff --git a/activerecord/test/cases/migrator_test.rb b/activerecord/test/cases/migrator_test.rb
index b93643922d..2e4b454a86 100644
--- a/activerecord/test/cases/migrator_test.rb
+++ b/activerecord/test/cases/migrator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "cases/migration/helper"
 
diff --git a/activerecord/test/cases/mixin_test.rb b/activerecord/test/cases/mixin_test.rb
index 82190c283e..a8af8e30f7 100644
--- a/activerecord/test/cases/mixin_test.rb
+++ b/activerecord/test/cases/mixin_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class Mixin < ActiveRecord::Base
diff --git a/activerecord/test/cases/modules_test.rb b/activerecord/test/cases/modules_test.rb
index 514911cb13..f8a7bab35f 100644
--- a/activerecord/test/cases/modules_test.rb
+++ b/activerecord/test/cases/modules_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/company_in_module"
 require "models/shop"
diff --git a/activerecord/test/cases/multiparameter_attributes_test.rb b/activerecord/test/cases/multiparameter_attributes_test.rb
index 7a35b5dc84..ceb5724377 100644
--- a/activerecord/test/cases/multiparameter_attributes_test.rb
+++ b/activerecord/test/cases/multiparameter_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/customer"
diff --git a/activerecord/test/cases/multiple_db_test.rb b/activerecord/test/cases/multiple_db_test.rb
index bfa5da765b..e3bb51bd77 100644
--- a/activerecord/test/cases/multiple_db_test.rb
+++ b/activerecord/test/cases/multiple_db_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/entrant"
 require "models/bird"
diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb
index aea65a7baf..154faa56aa 100644
--- a/activerecord/test/cases/nested_attributes_test.rb
+++ b/activerecord/test/cases/nested_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/pirate"
 require "models/ship"
diff --git a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
index 905ddef063..b9d2acbed2 100644
--- a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
+++ b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/pirate"
 require "models/bird"
diff --git a/activerecord/test/cases/numeric_data_test.rb b/activerecord/test/cases/numeric_data_test.rb
index b0a3d566bb..76b97033af 100644
--- a/activerecord/test/cases/numeric_data_test.rb
+++ b/activerecord/test/cases/numeric_data_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/numeric_data"
 
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 8f0099ee48..5895c51714 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/aircraft"
 require "models/post"
diff --git a/activerecord/test/cases/pooled_connections_test.rb b/activerecord/test/cases/pooled_connections_test.rb
index d99318f1aa..f1b0d08765 100644
--- a/activerecord/test/cases/pooled_connections_test.rb
+++ b/activerecord/test/cases/pooled_connections_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/project"
 require "timeout"
diff --git a/activerecord/test/cases/primary_keys_test.rb b/activerecord/test/cases/primary_keys_test.rb
index 61cd6b45a1..56229b70bc 100644
--- a/activerecord/test/cases/primary_keys_test.rb
+++ b/activerecord/test/cases/primary_keys_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 require "models/topic"
diff --git a/activerecord/test/cases/query_cache_test.rb b/activerecord/test/cases/query_cache_test.rb
index fb5305d288..b018a7b6c0 100644
--- a/activerecord/test/cases/query_cache_test.rb
+++ b/activerecord/test/cases/query_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/task"
diff --git a/activerecord/test/cases/quoting_test.rb b/activerecord/test/cases/quoting_test.rb
index 4cfad9c21f..0819776fbf 100644
--- a/activerecord/test/cases/quoting_test.rb
+++ b/activerecord/test/cases/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/readonly_test.rb b/activerecord/test/cases/readonly_test.rb
index 2e8d108985..24b678310d 100644
--- a/activerecord/test/cases/readonly_test.rb
+++ b/activerecord/test/cases/readonly_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/post"
diff --git a/activerecord/test/cases/reaper_test.rb b/activerecord/test/cases/reaper_test.rb
index 153311bece..249878b67d 100644
--- a/activerecord/test/cases/reaper_test.rb
+++ b/activerecord/test/cases/reaper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/reflection_test.rb b/activerecord/test/cases/reflection_test.rb
index e27000472c..c1c2efb9c8 100644
--- a/activerecord/test/cases/reflection_test.rb
+++ b/activerecord/test/cases/reflection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/customer"
diff --git a/activerecord/test/cases/relation/delegation_test.rb b/activerecord/test/cases/relation/delegation_test.rb
index 5945eab75a..3b15f051b2 100644
--- a/activerecord/test/cases/relation/delegation_test.rb
+++ b/activerecord/test/cases/relation/delegation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/relation/merging_test.rb b/activerecord/test/cases/relation/merging_test.rb
index feb5604284..3901824aac 100644
--- a/activerecord/test/cases/relation/merging_test.rb
+++ b/activerecord/test/cases/relation/merging_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/comment"
diff --git a/activerecord/test/cases/relation/mutation_test.rb b/activerecord/test/cases/relation/mutation_test.rb
index 113ddaa780..dea787c07f 100644
--- a/activerecord/test/cases/relation/mutation_test.rb
+++ b/activerecord/test/cases/relation/mutation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 
diff --git a/activerecord/test/cases/relation/or_test.rb b/activerecord/test/cases/relation/or_test.rb
index 541feabeb6..61b6601580 100644
--- a/activerecord/test/cases/relation/or_test.rb
+++ b/activerecord/test/cases/relation/or_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 
diff --git a/activerecord/test/cases/relation/predicate_builder_test.rb b/activerecord/test/cases/relation/predicate_builder_test.rb
index 94cd704a14..48758dc148 100644
--- a/activerecord/test/cases/relation/predicate_builder_test.rb
+++ b/activerecord/test/cases/relation/predicate_builder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/relation/record_fetch_warning_test.rb b/activerecord/test/cases/relation/record_fetch_warning_test.rb
index 59eb524f5a..62ca051431 100644
--- a/activerecord/test/cases/relation/record_fetch_warning_test.rb
+++ b/activerecord/test/cases/relation/record_fetch_warning_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "active_record/relation/record_fetch_warning"
diff --git a/activerecord/test/cases/relation/where_chain_test.rb b/activerecord/test/cases/relation/where_chain_test.rb
index 351e955947..86e150ed79 100644
--- a/activerecord/test/cases/relation/where_chain_test.rb
+++ b/activerecord/test/cases/relation/where_chain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/relation/where_clause_test.rb b/activerecord/test/cases/relation/where_clause_test.rb
index 59a7002774..f8eb0dee91 100644
--- a/activerecord/test/cases/relation/where_clause_test.rb
+++ b/activerecord/test/cases/relation/where_clause_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ActiveRecord::Relation
diff --git a/activerecord/test/cases/relation/where_test.rb b/activerecord/test/cases/relation/where_test.rb
index ac4fcfff1d..42dae4d569 100644
--- a/activerecord/test/cases/relation/where_test.rb
+++ b/activerecord/test/cases/relation/where_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/author"
 require "models/binary"
diff --git a/activerecord/test/cases/relation_test.rb b/activerecord/test/cases/relation_test.rb
index f81b155657..a403824f1a 100644
--- a/activerecord/test/cases/relation_test.rb
+++ b/activerecord/test/cases/relation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index c804bbf3a5..5767dec315 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/tag"
 require "models/tagging"
diff --git a/activerecord/test/cases/reload_models_test.rb b/activerecord/test/cases/reload_models_test.rb
index 6c2f9fb5ab..3f4c0c03e3 100644
--- a/activerecord/test/cases/reload_models_test.rb
+++ b/activerecord/test/cases/reload_models_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/owner"
 require "models/pet"
diff --git a/activerecord/test/cases/reserved_word_test.rb b/activerecord/test/cases/reserved_word_test.rb
index 44f7a28215..f3019a5326 100644
--- a/activerecord/test/cases/reserved_word_test.rb
+++ b/activerecord/test/cases/reserved_word_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class ReservedWordTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/result_test.rb b/activerecord/test/cases/result_test.rb
index b4044acd57..1a0b7c6ca7 100644
--- a/activerecord/test/cases/result_test.rb
+++ b/activerecord/test/cases/result_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/sanitize_test.rb b/activerecord/test/cases/sanitize_test.rb
index a0e7f4ae60..72f09186e2 100644
--- a/activerecord/test/cases/sanitize_test.rb
+++ b/activerecord/test/cases/sanitize_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/binary"
 require "models/author"
diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index 86a0e93832..4c81e825fa 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/schema_loading_test.rb b/activerecord/test/cases/schema_loading_test.rb
index e3b7755f07..362370ac61 100644
--- a/activerecord/test/cases/schema_loading_test.rb
+++ b/activerecord/test/cases/schema_loading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module SchemaLoadCounter
diff --git a/activerecord/test/cases/scoping/default_scoping_test.rb b/activerecord/test/cases/scoping/default_scoping_test.rb
index 9919ed5e3f..89fb434b27 100644
--- a/activerecord/test/cases/scoping/default_scoping_test.rb
+++ b/activerecord/test/cases/scoping/default_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/comment"
diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb
index ea338a9847..483ea7128d 100644
--- a/activerecord/test/cases/scoping/named_scoping_test.rb
+++ b/activerecord/test/cases/scoping/named_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/topic"
diff --git a/activerecord/test/cases/scoping/relation_scoping_test.rb b/activerecord/test/cases/scoping/relation_scoping_test.rb
index 644e7eb692..10553bf057 100644
--- a/activerecord/test/cases/scoping/relation_scoping_test.rb
+++ b/activerecord/test/cases/scoping/relation_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/post"
 require "models/author"
diff --git a/activerecord/test/cases/secure_token_test.rb b/activerecord/test/cases/secure_token_test.rb
index 987ae3074f..7b9cbee40a 100644
--- a/activerecord/test/cases/secure_token_test.rb
+++ b/activerecord/test/cases/secure_token_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/user"
 
diff --git a/activerecord/test/cases/serialization_test.rb b/activerecord/test/cases/serialization_test.rb
index 82e0311d84..ec33ad38f2 100644
--- a/activerecord/test/cases/serialization_test.rb
+++ b/activerecord/test/cases/serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/contact"
 require "models/topic"
diff --git a/activerecord/test/cases/serialized_attribute_test.rb b/activerecord/test/cases/serialized_attribute_test.rb
index 6525730350..e1bdaab5cf 100644
--- a/activerecord/test/cases/serialized_attribute_test.rb
+++ b/activerecord/test/cases/serialized_attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/statement_cache_test.rb b/activerecord/test/cases/statement_cache_test.rb
index ee1a8bfc36..fab3648564 100644
--- a/activerecord/test/cases/statement_cache_test.rb
+++ b/activerecord/test/cases/statement_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/book"
 require "models/liquid"
diff --git a/activerecord/test/cases/store_test.rb b/activerecord/test/cases/store_test.rb
index 0ece0632fe..633a8a0ebc 100644
--- a/activerecord/test/cases/store_test.rb
+++ b/activerecord/test/cases/store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/admin"
 require "models/admin/user"
diff --git a/activerecord/test/cases/suppressor_test.rb b/activerecord/test/cases/suppressor_test.rb
index bc85461322..a7d16b7cdb 100644
--- a/activerecord/test/cases/suppressor_test.rb
+++ b/activerecord/test/cases/suppressor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/notification"
 require "models/user"
diff --git a/activerecord/test/cases/tasks/database_tasks_test.rb b/activerecord/test/cases/tasks/database_tasks_test.rb
index b8280c4aaf..c47c97e9d9 100644
--- a/activerecord/test/cases/tasks/database_tasks_test.rb
+++ b/activerecord/test/cases/tasks/database_tasks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/tasks/database_tasks"
 
diff --git a/activerecord/test/cases/tasks/mysql_rake_test.rb b/activerecord/test/cases/tasks/mysql_rake_test.rb
index 02c0cfbb92..9c6fb14376 100644
--- a/activerecord/test/cases/tasks/mysql_rake_test.rb
+++ b/activerecord/test/cases/tasks/mysql_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/tasks/database_tasks"
 
diff --git a/activerecord/test/cases/tasks/postgresql_rake_test.rb b/activerecord/test/cases/tasks/postgresql_rake_test.rb
index 9369d1eedb..a2e968aedf 100644
--- a/activerecord/test/cases/tasks/postgresql_rake_test.rb
+++ b/activerecord/test/cases/tasks/postgresql_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/tasks/database_tasks"
 
diff --git a/activerecord/test/cases/tasks/sqlite_rake_test.rb b/activerecord/test/cases/tasks/sqlite_rake_test.rb
index 0deedad671..ccb3834fee 100644
--- a/activerecord/test/cases/tasks/sqlite_rake_test.rb
+++ b/activerecord/test/cases/tasks/sqlite_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "active_record/tasks/database_tasks"
 require "pathname"
diff --git a/activerecord/test/cases/test_case.rb b/activerecord/test/cases/test_case.rb
index 247d0ec3d1..9f594fef85 100644
--- a/activerecord/test/cases/test_case.rb
+++ b/activerecord/test/cases/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/test_case"
 require "active_support/testing/autorun"
 require "active_support/testing/method_call_assertions"
diff --git a/activerecord/test/cases/test_fixtures_test.rb b/activerecord/test/cases/test_fixtures_test.rb
index e542716563..58d3bea3a2 100644
--- a/activerecord/test/cases/test_fixtures_test.rb
+++ b/activerecord/test/cases/test_fixtures_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class TestFixturesTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/time_precision_test.rb b/activerecord/test/cases/time_precision_test.rb
index 3a8f8af0e6..09c585167e 100644
--- a/activerecord/test/cases/time_precision_test.rb
+++ b/activerecord/test/cases/time_precision_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/schema_dumping_helper"
 
diff --git a/activerecord/test/cases/timestamp_test.rb b/activerecord/test/cases/timestamp_test.rb
index 0f58c96504..39b40e3411 100644
--- a/activerecord/test/cases/timestamp_test.rb
+++ b/activerecord/test/cases/timestamp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "support/ddl_helper"
 require "models/developer"
diff --git a/activerecord/test/cases/touch_later_test.rb b/activerecord/test/cases/touch_later_test.rb
index 24b5e8886f..d1e8c649d9 100644
--- a/activerecord/test/cases/touch_later_test.rb
+++ b/activerecord/test/cases/touch_later_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/invoice"
 require "models/line_item"
diff --git a/activerecord/test/cases/transaction_callbacks_test.rb b/activerecord/test/cases/transaction_callbacks_test.rb
index aa0d8f5e65..eaa4dd09a9 100644
--- a/activerecord/test/cases/transaction_callbacks_test.rb
+++ b/activerecord/test/cases/transaction_callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/owner"
 require "models/pet"
diff --git a/activerecord/test/cases/transaction_isolation_test.rb b/activerecord/test/cases/transaction_isolation_test.rb
index 380d7dbb0a..58abfadaf4 100644
--- a/activerecord/test/cases/transaction_isolation_test.rb
+++ b/activerecord/test/cases/transaction_isolation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 unless ActiveRecord::Base.connection.supports_transaction_isolation?
diff --git a/activerecord/test/cases/transactions_test.rb b/activerecord/test/cases/transactions_test.rb
index ced6045955..79ba306ef5 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/type/adapter_specific_registry_test.rb b/activerecord/test/cases/type/adapter_specific_registry_test.rb
index a723a952ea..8b836b4793 100644
--- a/activerecord/test/cases/type/adapter_specific_registry_test.rb
+++ b/activerecord/test/cases/type/adapter_specific_registry_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/type/date_time_test.rb b/activerecord/test/cases/type/date_time_test.rb
index 9307587564..6848619ece 100644
--- a/activerecord/test/cases/type/date_time_test.rb
+++ b/activerecord/test/cases/type/date_time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/task"
 
diff --git a/activerecord/test/cases/type/integer_test.rb b/activerecord/test/cases/type/integer_test.rb
index 13d6d2093b..368b6d7199 100644
--- a/activerecord/test/cases/type/integer_test.rb
+++ b/activerecord/test/cases/type/integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/company"
 
diff --git a/activerecord/test/cases/type/string_test.rb b/activerecord/test/cases/type/string_test.rb
index 899d7ae767..a95da864fa 100644
--- a/activerecord/test/cases/type/string_test.rb
+++ b/activerecord/test/cases/type/string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/type/type_map_test.rb b/activerecord/test/cases/type/type_map_test.rb
index f171175b2a..2959d36466 100644
--- a/activerecord/test/cases/type/type_map_test.rb
+++ b/activerecord/test/cases/type/type_map_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/type/unsigned_integer_test.rb b/activerecord/test/cases/type/unsigned_integer_test.rb
index b0a60a2b3d..1cd4dbc2c5 100644
--- a/activerecord/test/cases/type/unsigned_integer_test.rb
+++ b/activerecord/test/cases/type/unsigned_integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/type_test.rb b/activerecord/test/cases/type_test.rb
index 0f9f698760..d45a9b3141 100644
--- a/activerecord/test/cases/type_test.rb
+++ b/activerecord/test/cases/type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class TypeTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/types_test.rb b/activerecord/test/cases/types_test.rb
index ea55bb00cd..11476ea0ef 100644
--- a/activerecord/test/cases/types_test.rb
+++ b/activerecord/test/cases/types_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 module ActiveRecord
diff --git a/activerecord/test/cases/unconnected_test.rb b/activerecord/test/cases/unconnected_test.rb
index 30efd03955..b210584644 100644
--- a/activerecord/test/cases/unconnected_test.rb
+++ b/activerecord/test/cases/unconnected_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 
 class TestRecord < ActiveRecord::Base
diff --git a/activerecord/test/cases/validations/absence_validation_test.rb b/activerecord/test/cases/validations/absence_validation_test.rb
index 051f14dbb7..870619e4e7 100644
--- a/activerecord/test/cases/validations/absence_validation_test.rb
+++ b/activerecord/test/cases/validations/absence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/face"
 require "models/interest"
diff --git a/activerecord/test/cases/validations/association_validation_test.rb b/activerecord/test/cases/validations/association_validation_test.rb
index 0935dc8c32..f5ceb27d97 100644
--- a/activerecord/test/cases/validations/association_validation_test.rb
+++ b/activerecord/test/cases/validations/association_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb b/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
index fdfd568897..a57065ba75 100644
--- a/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
+++ b/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 
diff --git a/activerecord/test/cases/validations/i18n_validation_test.rb b/activerecord/test/cases/validations/i18n_validation_test.rb
index a020c877e7..fd88a3ea67 100644
--- a/activerecord/test/cases/validations/i18n_validation_test.rb
+++ b/activerecord/test/cases/validations/i18n_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/validations/length_validation_test.rb b/activerecord/test/cases/validations/length_validation_test.rb
index 7f840dfa7c..ba45c6dcc1 100644
--- a/activerecord/test/cases/validations/length_validation_test.rb
+++ b/activerecord/test/cases/validations/length_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/owner"
 require "models/pet"
diff --git a/activerecord/test/cases/validations/presence_validation_test.rb b/activerecord/test/cases/validations/presence_validation_test.rb
index dee8528124..13956e26ec 100644
--- a/activerecord/test/cases/validations/presence_validation_test.rb
+++ b/activerecord/test/cases/validations/presence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/man"
 require "models/face"
diff --git a/activerecord/test/cases/validations/uniqueness_validation_test.rb b/activerecord/test/cases/validations/uniqueness_validation_test.rb
index e943d03720..28605d2f8e 100644
--- a/activerecord/test/cases/validations/uniqueness_validation_test.rb
+++ b/activerecord/test/cases/validations/uniqueness_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/validations_repair_helper.rb b/activerecord/test/cases/validations_repair_helper.rb
index 30299fd2c6..b30666d876 100644
--- a/activerecord/test/cases/validations_repair_helper.rb
+++ b/activerecord/test/cases/validations_repair_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveRecord
   module ValidationsRepairHelper
     extend ActiveSupport::Concern
diff --git a/activerecord/test/cases/validations_test.rb b/activerecord/test/cases/validations_test.rb
index fc9678211a..a305aa295a 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/cases/view_test.rb b/activerecord/test/cases/view_test.rb
index 89b72ec336..1d21a2454f 100644
--- a/activerecord/test/cases/view_test.rb
+++ b/activerecord/test/cases/view_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/book"
 require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/yaml_serialization_test.rb b/activerecord/test/cases/yaml_serialization_test.rb
index 1b67e150f3..dd8d2c1178 100644
--- a/activerecord/test/cases/yaml_serialization_test.rb
+++ b/activerecord/test/cases/yaml_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cases/helper"
 require "models/topic"
 require "models/reply"
diff --git a/activerecord/test/config.rb b/activerecord/test/config.rb
index d0d1933300..a65e6ff776 100644
--- a/activerecord/test/config.rb
+++ b/activerecord/test/config.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 TEST_ROOT       = __dir__
 ASSETS_ROOT     = TEST_ROOT + "/assets"
 FIXTURES_ROOT   = TEST_ROOT + "/fixtures"
diff --git a/activerecord/test/migrations/10_urban/9_add_expressions.rb b/activerecord/test/migrations/10_urban/9_add_expressions.rb
index db9fda3e05..e908c9eabc 100644
--- a/activerecord/test/migrations/10_urban/9_add_expressions.rb
+++ b/activerecord/test/migrations/10_urban/9_add_expressions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AddExpressions < ActiveRecord::Migration::Current
   def self.up
     create_table("expressions") do |t|
diff --git a/activerecord/test/migrations/decimal/1_give_me_big_numbers.rb b/activerecord/test/migrations/decimal/1_give_me_big_numbers.rb
index f13f72eb4e..43c79bc20b 100644
--- a/activerecord/test/migrations/decimal/1_give_me_big_numbers.rb
+++ b/activerecord/test/migrations/decimal/1_give_me_big_numbers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class GiveMeBigNumbers < ActiveRecord::Migration::Current
   def self.up
     create_table :big_numbers do |table|
diff --git a/activerecord/test/migrations/magic/1_currencies_have_symbols.rb b/activerecord/test/migrations/magic/1_currencies_have_symbols.rb
index d8a864b213..d4b0e6cd95 100644
--- a/activerecord/test/migrations/magic/1_currencies_have_symbols.rb
+++ b/activerecord/test/migrations/magic/1_currencies_have_symbols.rb
@@ -1,10 +1,9 @@
-# frozen_string_literal: true
 # coding: ISO-8859-15
 
 class CurrenciesHaveSymbols < ActiveRecord::Migration::Current
   def self.up
-    # We use € for default currency symbol
-    add_column "currencies", "symbol", :string, default: "€"
+    # We use € for default currency symbol
+    add_column "currencies", "symbol", :string, default: "€"
   end
 
   def self.down
diff --git a/activerecord/test/migrations/missing/1000_people_have_middle_names.rb b/activerecord/test/migrations/missing/1000_people_have_middle_names.rb
index a1a5dcbac2..e046944e31 100644
--- a/activerecord/test/migrations/missing/1000_people_have_middle_names.rb
+++ b/activerecord/test/migrations/missing/1000_people_have_middle_names.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveMiddleNames < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "middle_name", :string
diff --git a/activerecord/test/migrations/missing/1_people_have_last_names.rb b/activerecord/test/migrations/missing/1_people_have_last_names.rb
index 1480b4b8f3..50fe2a9c8e 100644
--- a/activerecord/test/migrations/missing/1_people_have_last_names.rb
+++ b/activerecord/test/migrations/missing/1_people_have_last_names.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveLastNames < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "last_name", :string
diff --git a/activerecord/test/migrations/missing/3_we_need_reminders.rb b/activerecord/test/migrations/missing/3_we_need_reminders.rb
index e69296a31f..d7c63ac892 100644
--- a/activerecord/test/migrations/missing/3_we_need_reminders.rb
+++ b/activerecord/test/migrations/missing/3_we_need_reminders.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WeNeedReminders < ActiveRecord::Migration::Current
   def self.up
     create_table("reminders") do |t|
diff --git a/activerecord/test/migrations/missing/4_innocent_jointable.rb b/activerecord/test/migrations/missing/4_innocent_jointable.rb
index 0c021c6162..bd3bf21576 100644
--- a/activerecord/test/migrations/missing/4_innocent_jointable.rb
+++ b/activerecord/test/migrations/missing/4_innocent_jointable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class InnocentJointable < ActiveRecord::Migration::Current
   def self.up
     create_table("people_reminders", id: false) do |t|
diff --git a/activerecord/test/migrations/rename/1_we_need_things.rb b/activerecord/test/migrations/rename/1_we_need_things.rb
index 411d6f9646..9dce01acfd 100644
--- a/activerecord/test/migrations/rename/1_we_need_things.rb
+++ b/activerecord/test/migrations/rename/1_we_need_things.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WeNeedThings < ActiveRecord::Migration::Current
   def self.up
     create_table("things") do |t|
diff --git a/activerecord/test/migrations/rename/2_rename_things.rb b/activerecord/test/migrations/rename/2_rename_things.rb
index 99b1cec7f5..cb8484e7dc 100644
--- a/activerecord/test/migrations/rename/2_rename_things.rb
+++ b/activerecord/test/migrations/rename/2_rename_things.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class RenameThings < ActiveRecord::Migration::Current
   def self.up
     rename_table "things", "awesome_things"
diff --git a/activerecord/test/migrations/to_copy/1_people_have_hobbies.rb b/activerecord/test/migrations/to_copy/1_people_have_hobbies.rb
index 65b92fbb85..76734bcd7d 100644
--- a/activerecord/test/migrations/to_copy/1_people_have_hobbies.rb
+++ b/activerecord/test/migrations/to_copy/1_people_have_hobbies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveHobbies < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "hobbies", :text
diff --git a/activerecord/test/migrations/to_copy/2_people_have_descriptions.rb b/activerecord/test/migrations/to_copy/2_people_have_descriptions.rb
index 7a3bede29a..7f883dbb45 100644
--- a/activerecord/test/migrations/to_copy/2_people_have_descriptions.rb
+++ b/activerecord/test/migrations/to_copy/2_people_have_descriptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveDescriptions < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "description", :text
diff --git a/activerecord/test/migrations/to_copy2/1_create_articles.rb b/activerecord/test/migrations/to_copy2/1_create_articles.rb
index 3a82d15aea..2e9f5ec6bc 100644
--- a/activerecord/test/migrations/to_copy2/1_create_articles.rb
+++ b/activerecord/test/migrations/to_copy2/1_create_articles.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CreateArticles < ActiveRecord::Migration::Current
   def self.up
   end
diff --git a/activerecord/test/migrations/to_copy2/2_create_comments.rb b/activerecord/test/migrations/to_copy2/2_create_comments.rb
index fb1032f8dd..d361847d4b 100644
--- a/activerecord/test/migrations/to_copy2/2_create_comments.rb
+++ b/activerecord/test/migrations/to_copy2/2_create_comments.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CreateComments < ActiveRecord::Migration::Current
   def self.up
   end
diff --git a/activerecord/test/migrations/to_copy_with_name_collision/1_people_have_hobbies.rb b/activerecord/test/migrations/to_copy_with_name_collision/1_people_have_hobbies.rb
index ea106d5be4..1a863367dd 100644
--- a/activerecord/test/migrations/to_copy_with_name_collision/1_people_have_hobbies.rb
+++ b/activerecord/test/migrations/to_copy_with_name_collision/1_people_have_hobbies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveHobbies < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "hobbies", :string
diff --git a/activerecord/test/migrations/to_copy_with_timestamps/20090101010101_people_have_hobbies.rb b/activerecord/test/migrations/to_copy_with_timestamps/20090101010101_people_have_hobbies.rb
index 65b92fbb85..76734bcd7d 100644
--- a/activerecord/test/migrations/to_copy_with_timestamps/20090101010101_people_have_hobbies.rb
+++ b/activerecord/test/migrations/to_copy_with_timestamps/20090101010101_people_have_hobbies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveHobbies < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "hobbies", :text
diff --git a/activerecord/test/migrations/to_copy_with_timestamps/20090101010202_people_have_descriptions.rb b/activerecord/test/migrations/to_copy_with_timestamps/20090101010202_people_have_descriptions.rb
index 7a3bede29a..7f883dbb45 100644
--- a/activerecord/test/migrations/to_copy_with_timestamps/20090101010202_people_have_descriptions.rb
+++ b/activerecord/test/migrations/to_copy_with_timestamps/20090101010202_people_have_descriptions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PeopleHaveDescriptions < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "description", :text
diff --git a/activerecord/test/migrations/to_copy_with_timestamps2/20090101010101_create_articles.rb b/activerecord/test/migrations/to_copy_with_timestamps2/20090101010101_create_articles.rb
index 3a82d15aea..2e9f5ec6bc 100644
--- a/activerecord/test/migrations/to_copy_with_timestamps2/20090101010101_create_articles.rb
+++ b/activerecord/test/migrations/to_copy_with_timestamps2/20090101010101_create_articles.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CreateArticles < ActiveRecord::Migration::Current
   def self.up
   end
diff --git a/activerecord/test/migrations/to_copy_with_timestamps2/20090101010202_create_comments.rb b/activerecord/test/migrations/to_copy_with_timestamps2/20090101010202_create_comments.rb
index fb1032f8dd..d361847d4b 100644
--- a/activerecord/test/migrations/to_copy_with_timestamps2/20090101010202_create_comments.rb
+++ b/activerecord/test/migrations/to_copy_with_timestamps2/20090101010202_create_comments.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CreateComments < ActiveRecord::Migration::Current
   def self.up
   end
diff --git a/activerecord/test/migrations/valid/1_valid_people_have_last_names.rb b/activerecord/test/migrations/valid/1_valid_people_have_last_names.rb
index 1d2193469c..c450211d8c 100644
--- a/activerecord/test/migrations/valid/1_valid_people_have_last_names.rb
+++ b/activerecord/test/migrations/valid/1_valid_people_have_last_names.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ValidPeopleHaveLastNames < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "last_name", :string
diff --git a/activerecord/test/migrations/valid/2_we_need_reminders.rb b/activerecord/test/migrations/valid/2_we_need_reminders.rb
index e69296a31f..d7c63ac892 100644
--- a/activerecord/test/migrations/valid/2_we_need_reminders.rb
+++ b/activerecord/test/migrations/valid/2_we_need_reminders.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WeNeedReminders < ActiveRecord::Migration::Current
   def self.up
     create_table("reminders") do |t|
diff --git a/activerecord/test/migrations/valid/3_innocent_jointable.rb b/activerecord/test/migrations/valid/3_innocent_jointable.rb
index 0c021c6162..bd3bf21576 100644
--- a/activerecord/test/migrations/valid/3_innocent_jointable.rb
+++ b/activerecord/test/migrations/valid/3_innocent_jointable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class InnocentJointable < ActiveRecord::Migration::Current
   def self.up
     create_table("people_reminders", id: false) do |t|
diff --git a/activerecord/test/migrations/valid_with_subdirectories/1_valid_people_have_last_names.rb b/activerecord/test/migrations/valid_with_subdirectories/1_valid_people_have_last_names.rb
index 1d2193469c..c450211d8c 100644
--- a/activerecord/test/migrations/valid_with_subdirectories/1_valid_people_have_last_names.rb
+++ b/activerecord/test/migrations/valid_with_subdirectories/1_valid_people_have_last_names.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ValidPeopleHaveLastNames < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "last_name", :string
diff --git a/activerecord/test/migrations/valid_with_subdirectories/sub/2_we_need_reminders.rb b/activerecord/test/migrations/valid_with_subdirectories/sub/2_we_need_reminders.rb
index e69296a31f..d7c63ac892 100644
--- a/activerecord/test/migrations/valid_with_subdirectories/sub/2_we_need_reminders.rb
+++ b/activerecord/test/migrations/valid_with_subdirectories/sub/2_we_need_reminders.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WeNeedReminders < ActiveRecord::Migration::Current
   def self.up
     create_table("reminders") do |t|
diff --git a/activerecord/test/migrations/valid_with_subdirectories/sub1/3_innocent_jointable.rb b/activerecord/test/migrations/valid_with_subdirectories/sub1/3_innocent_jointable.rb
index 0c021c6162..bd3bf21576 100644
--- a/activerecord/test/migrations/valid_with_subdirectories/sub1/3_innocent_jointable.rb
+++ b/activerecord/test/migrations/valid_with_subdirectories/sub1/3_innocent_jointable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class InnocentJointable < ActiveRecord::Migration::Current
   def self.up
     create_table("people_reminders", id: false) do |t|
diff --git a/activerecord/test/migrations/valid_with_timestamps/20100101010101_valid_with_timestamps_people_have_last_names.rb b/activerecord/test/migrations/valid_with_timestamps/20100101010101_valid_with_timestamps_people_have_last_names.rb
index f7ef1a9769..9fd27593f0 100644
--- a/activerecord/test/migrations/valid_with_timestamps/20100101010101_valid_with_timestamps_people_have_last_names.rb
+++ b/activerecord/test/migrations/valid_with_timestamps/20100101010101_valid_with_timestamps_people_have_last_names.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ValidWithTimestampsPeopleHaveLastNames < ActiveRecord::Migration::Current
   def self.up
     add_column "people", "last_name", :string
diff --git a/activerecord/test/migrations/valid_with_timestamps/20100201010101_valid_with_timestamps_we_need_reminders.rb b/activerecord/test/migrations/valid_with_timestamps/20100201010101_valid_with_timestamps_we_need_reminders.rb
index 7732032c5d..4a59921136 100644
--- a/activerecord/test/migrations/valid_with_timestamps/20100201010101_valid_with_timestamps_we_need_reminders.rb
+++ b/activerecord/test/migrations/valid_with_timestamps/20100201010101_valid_with_timestamps_we_need_reminders.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ValidWithTimestampsWeNeedReminders < ActiveRecord::Migration::Current
   def self.up
     create_table("reminders") do |t|
diff --git a/activerecord/test/migrations/valid_with_timestamps/20100301010101_valid_with_timestamps_innocent_jointable.rb b/activerecord/test/migrations/valid_with_timestamps/20100301010101_valid_with_timestamps_innocent_jointable.rb
index cf652c008a..be24de6d70 100644
--- a/activerecord/test/migrations/valid_with_timestamps/20100301010101_valid_with_timestamps_innocent_jointable.rb
+++ b/activerecord/test/migrations/valid_with_timestamps/20100301010101_valid_with_timestamps_innocent_jointable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ValidWithTimestampsInnocentJointable < ActiveRecord::Migration::Current
   def self.up
     create_table("people_reminders", id: false) do |t|
diff --git a/activerecord/test/migrations/version_check/20131219224947_migration_version_check.rb b/activerecord/test/migrations/version_check/20131219224947_migration_version_check.rb
index ceb0cc98bf..6f314c881c 100644
--- a/activerecord/test/migrations/version_check/20131219224947_migration_version_check.rb
+++ b/activerecord/test/migrations/version_check/20131219224947_migration_version_check.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class MigrationVersionCheck < ActiveRecord::Migration::Current
   def self.up
     raise "incorrect migration version" unless version == 20131219224947
diff --git a/activerecord/test/models/admin.rb b/activerecord/test/models/admin.rb
index 6c8a6eddb0..bc3ce23447 100644
--- a/activerecord/test/models/admin.rb
+++ b/activerecord/test/models/admin.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Admin
   def self.table_name_prefix
     "admin_"
diff --git a/activerecord/test/models/admin/account.rb b/activerecord/test/models/admin/account.rb
index 2dddfa8fe9..bd23192d20 100644
--- a/activerecord/test/models/admin/account.rb
+++ b/activerecord/test/models/admin/account.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Admin::Account < ActiveRecord::Base
   has_many :users
 end
diff --git a/activerecord/test/models/admin/randomly_named_c1.rb b/activerecord/test/models/admin/randomly_named_c1.rb
index dc1c8c66d7..b64ae7fc41 100644
--- a/activerecord/test/models/admin/randomly_named_c1.rb
+++ b/activerecord/test/models/admin/randomly_named_c1.rb
@@ -1,8 +1,7 @@
-# frozen_string_literal: true
-class Admin::ClassNameThatDoesNotFollowCONVENTIONS1 < ActiveRecord::Base
-  self.table_name = :randomly_named_table2
-end
-
-class Admin::ClassNameThatDoesNotFollowCONVENTIONS2 < ActiveRecord::Base
-  self.table_name = :randomly_named_table3
-end
+class Admin::ClassNameThatDoesNotFollowCONVENTIONS1 < ActiveRecord::Base
+  self.table_name = :randomly_named_table2
+end
+
+class Admin::ClassNameThatDoesNotFollowCONVENTIONS2 < ActiveRecord::Base
+  self.table_name = :randomly_named_table3
+end
diff --git a/activerecord/test/models/admin/user.rb b/activerecord/test/models/admin/user.rb
index 1157ca266c..a76e4b6795 100644
--- a/activerecord/test/models/admin/user.rb
+++ b/activerecord/test/models/admin/user.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Admin::User < ActiveRecord::Base
   class Coder
     def initialize(default = {})
diff --git a/activerecord/test/models/aircraft.rb b/activerecord/test/models/aircraft.rb
index 02421afe34..ebd42ff824 100644
--- a/activerecord/test/models/aircraft.rb
+++ b/activerecord/test/models/aircraft.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Aircraft < ActiveRecord::Base
   self.pluralize_table_names = false
   has_many :engines, foreign_key: "car_id"
diff --git a/activerecord/test/models/arunit2_model.rb b/activerecord/test/models/arunit2_model.rb
index 80a8ecc5d8..04b8b15d3d 100644
--- a/activerecord/test/models/arunit2_model.rb
+++ b/activerecord/test/models/arunit2_model.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ARUnit2Model < ActiveRecord::Base
   self.abstract_class = true
 end
diff --git a/activerecord/test/models/author.rb b/activerecord/test/models/author.rb
index c3278846d6..2d9cba77e0 100644
--- a/activerecord/test/models/author.rb
+++ b/activerecord/test/models/author.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Author < ActiveRecord::Base
   has_many :posts
   has_many :serialized_posts
diff --git a/activerecord/test/models/auto_id.rb b/activerecord/test/models/auto_id.rb
index 56479b49eb..82c6544bd5 100644
--- a/activerecord/test/models/auto_id.rb
+++ b/activerecord/test/models/auto_id.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AutoId < ActiveRecord::Base
   self.table_name = "auto_id_tests"
   self.primary_key = "auto_id"
diff --git a/activerecord/test/models/autoloadable/extra_firm.rb b/activerecord/test/models/autoloadable/extra_firm.rb
index 54c421e459..5578ba0d9b 100644
--- a/activerecord/test/models/autoloadable/extra_firm.rb
+++ b/activerecord/test/models/autoloadable/extra_firm.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ExtraFirm < Company
 end
diff --git a/activerecord/test/models/binary.rb b/activerecord/test/models/binary.rb
index 4b1212705b..39b2f5090a 100644
--- a/activerecord/test/models/binary.rb
+++ b/activerecord/test/models/binary.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Binary < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/bird.rb b/activerecord/test/models/bird.rb
index ba923b4316..24b839135d 100644
--- a/activerecord/test/models/bird.rb
+++ b/activerecord/test/models/bird.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Bird < ActiveRecord::Base
   belongs_to :pirate
   validates_presence_of :name
diff --git a/activerecord/test/models/book.rb b/activerecord/test/models/book.rb
index 46d5d94da3..6466e1b341 100644
--- a/activerecord/test/models/book.rb
+++ b/activerecord/test/models/book.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Book < ActiveRecord::Base
   belongs_to :author
 
diff --git a/activerecord/test/models/boolean.rb b/activerecord/test/models/boolean.rb
index e2f1bb8a9a..0da228aac2 100644
--- a/activerecord/test/models/boolean.rb
+++ b/activerecord/test/models/boolean.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Boolean < ActiveRecord::Base
   def has_fun
     super
diff --git a/activerecord/test/models/bulb.rb b/activerecord/test/models/bulb.rb
index ad9806db55..113d21cb84 100644
--- a/activerecord/test/models/bulb.rb
+++ b/activerecord/test/models/bulb.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Bulb < ActiveRecord::Base
   default_scope { where(name: "defaulty") }
   belongs_to :car, touch: true
diff --git a/activerecord/test/models/cake_designer.rb b/activerecord/test/models/cake_designer.rb
index 20fa26a556..9c57ef573a 100644
--- a/activerecord/test/models/cake_designer.rb
+++ b/activerecord/test/models/cake_designer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CakeDesigner < ActiveRecord::Base
   has_one :chef, as: :employable
 end
diff --git a/activerecord/test/models/car.rb b/activerecord/test/models/car.rb
index 3c3d9295b0..92bff7ff96 100644
--- a/activerecord/test/models/car.rb
+++ b/activerecord/test/models/car.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Car < ActiveRecord::Base
   has_many :bulbs
   has_many :all_bulbs, -> { unscope where: :name }, class_name: "Bulb"
diff --git a/activerecord/test/models/carrier.rb b/activerecord/test/models/carrier.rb
index bf8055fbd7..230be118c3 100644
--- a/activerecord/test/models/carrier.rb
+++ b/activerecord/test/models/carrier.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Carrier < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/cat.rb b/activerecord/test/models/cat.rb
index 4c76ec86cf..dfdde18641 100644
--- a/activerecord/test/models/cat.rb
+++ b/activerecord/test/models/cat.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Cat < ActiveRecord::Base
   self.abstract_class = true
 
diff --git a/activerecord/test/models/categorization.rb b/activerecord/test/models/categorization.rb
index 87b81e1e2d..b99383d0b1 100644
--- a/activerecord/test/models/categorization.rb
+++ b/activerecord/test/models/categorization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Categorization < ActiveRecord::Base
   belongs_to :post
   belongs_to :category, counter_cache: true
diff --git a/activerecord/test/models/category.rb b/activerecord/test/models/category.rb
index 392fe94fe7..4b2840c653 100644
--- a/activerecord/test/models/category.rb
+++ b/activerecord/test/models/category.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Category < ActiveRecord::Base
   has_and_belongs_to_many :posts
   has_and_belongs_to_many :special_posts, class_name: "Post"
diff --git a/activerecord/test/models/chef.rb b/activerecord/test/models/chef.rb
index daa208ff5f..9d3dd01016 100644
--- a/activerecord/test/models/chef.rb
+++ b/activerecord/test/models/chef.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Chef < ActiveRecord::Base
   belongs_to :employable, polymorphic: true
   has_many :recipes
diff --git a/activerecord/test/models/citation.rb b/activerecord/test/models/citation.rb
index 8a6c300a28..7d06387f56 100644
--- a/activerecord/test/models/citation.rb
+++ b/activerecord/test/models/citation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Citation < ActiveRecord::Base
   belongs_to :reference_of, class_name: "Book", foreign_key: :book2_id
 end
diff --git a/activerecord/test/models/club.rb b/activerecord/test/models/club.rb
index cdd5b37792..49d7b24a3b 100644
--- a/activerecord/test/models/club.rb
+++ b/activerecord/test/models/club.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Club < ActiveRecord::Base
   has_one :membership
   has_many :memberships, inverse_of: false
diff --git a/activerecord/test/models/college.rb b/activerecord/test/models/college.rb
index 70c0cd1534..c9dbe1ecc2 100644
--- a/activerecord/test/models/college.rb
+++ b/activerecord/test/models/college.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_dependency "models/arunit2_model"
 require "active_support/core_ext/object/with_options"
 
diff --git a/activerecord/test/models/column.rb b/activerecord/test/models/column.rb
index 08e1a4ae2d..499358b4cf 100644
--- a/activerecord/test/models/column.rb
+++ b/activerecord/test/models/column.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Column < ActiveRecord::Base
   belongs_to :record
 end
diff --git a/activerecord/test/models/column_name.rb b/activerecord/test/models/column_name.rb
index 3b4452c3c2..460eb4fe20 100644
--- a/activerecord/test/models/column_name.rb
+++ b/activerecord/test/models/column_name.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ColumnName < ActiveRecord::Base
   self.table_name = "colnametests"
 end
diff --git a/activerecord/test/models/comment.rb b/activerecord/test/models/comment.rb
index 6c10ec0858..eecf923046 100644
--- a/activerecord/test/models/comment.rb
+++ b/activerecord/test/models/comment.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Comment < ActiveRecord::Base
   scope :limit_by, lambda { |l| limit(l) }
   scope :containing_the_letter_e, -> { where("comments.body LIKE '%e%'") }
diff --git a/activerecord/test/models/company.rb b/activerecord/test/models/company.rb
index 8a6d909188..c6a5bf1c92 100644
--- a/activerecord/test/models/company.rb
+++ b/activerecord/test/models/company.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AbstractCompany < ActiveRecord::Base
   self.abstract_class = true
 end
diff --git a/activerecord/test/models/company_in_module.rb b/activerecord/test/models/company_in_module.rb
index 2e7295eed1..0782c1eff4 100644
--- a/activerecord/test/models/company_in_module.rb
+++ b/activerecord/test/models/company_in_module.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/with_options"
 
 module MyApplication
diff --git a/activerecord/test/models/computer.rb b/activerecord/test/models/computer.rb
index f2998d362a..1c9856e1af 100644
--- a/activerecord/test/models/computer.rb
+++ b/activerecord/test/models/computer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Computer < ActiveRecord::Base
   belongs_to :developer, foreign_key: "developer"
 end
diff --git a/activerecord/test/models/contact.rb b/activerecord/test/models/contact.rb
index 0a095301bd..47bbbbfd8b 100644
--- a/activerecord/test/models/contact.rb
+++ b/activerecord/test/models/contact.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ContactFakeColumns
   def self.extended(base)
     base.class_eval do
diff --git a/activerecord/test/models/content.rb b/activerecord/test/models/content.rb
index f2913be22d..68db2127d8 100644
--- a/activerecord/test/models/content.rb
+++ b/activerecord/test/models/content.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Content < ActiveRecord::Base
   self.table_name = "content"
   has_one :content_position, dependent: :destroy
diff --git a/activerecord/test/models/contract.rb b/activerecord/test/models/contract.rb
index e4bace0e32..32bd581377 100644
--- a/activerecord/test/models/contract.rb
+++ b/activerecord/test/models/contract.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Contract < ActiveRecord::Base
   belongs_to :company
   belongs_to :developer
diff --git a/activerecord/test/models/country.rb b/activerecord/test/models/country.rb
index 5c1c6dc492..7912719ddd 100644
--- a/activerecord/test/models/country.rb
+++ b/activerecord/test/models/country.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Country < ActiveRecord::Base
   self.primary_key = :country_id
 
diff --git a/activerecord/test/models/course.rb b/activerecord/test/models/course.rb
index 0af33ed85f..348f2bf1e0 100644
--- a/activerecord/test/models/course.rb
+++ b/activerecord/test/models/course.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_dependency "models/arunit2_model"
 
 class Course < ARUnit2Model
diff --git a/activerecord/test/models/customer.rb b/activerecord/test/models/customer.rb
index 2eb4c720a6..3d40cb1ace 100644
--- a/activerecord/test/models/customer.rb
+++ b/activerecord/test/models/customer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Customer < ActiveRecord::Base
   cattr_accessor :gps_conversion_was_run
 
diff --git a/activerecord/test/models/customer_carrier.rb b/activerecord/test/models/customer_carrier.rb
index 3d236da43d..37186903ff 100644
--- a/activerecord/test/models/customer_carrier.rb
+++ b/activerecord/test/models/customer_carrier.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CustomerCarrier < ActiveRecord::Base
   cattr_accessor :current_customer
 
diff --git a/activerecord/test/models/dashboard.rb b/activerecord/test/models/dashboard.rb
index fe54e9d6fc..1b3b54545f 100644
--- a/activerecord/test/models/dashboard.rb
+++ b/activerecord/test/models/dashboard.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Dashboard < ActiveRecord::Base
   self.primary_key = :dashboard_id
 end
diff --git a/activerecord/test/models/default.rb b/activerecord/test/models/default.rb
index 6f87ee74f7..887e9cc999 100644
--- a/activerecord/test/models/default.rb
+++ b/activerecord/test/models/default.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Default < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/department.rb b/activerecord/test/models/department.rb
index e8cdae8976..08004a0ed3 100644
--- a/activerecord/test/models/department.rb
+++ b/activerecord/test/models/department.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Department < ActiveRecord::Base
   has_many :chefs
   belongs_to :hotel
diff --git a/activerecord/test/models/developer.rb b/activerecord/test/models/developer.rb
index aa7798c582..654830ba11 100644
--- a/activerecord/test/models/developer.rb
+++ b/activerecord/test/models/developer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "ostruct"
 
 module DeveloperProjectsAssociationExtension2
diff --git a/activerecord/test/models/dog.rb b/activerecord/test/models/dog.rb
index 08eeb6b75e..b02b8447b8 100644
--- a/activerecord/test/models/dog.rb
+++ b/activerecord/test/models/dog.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Dog < ActiveRecord::Base
   belongs_to :breeder, class_name: "DogLover", counter_cache: :bred_dogs_count
   belongs_to :trainer, class_name: "DogLover", counter_cache: :trained_dogs_count
diff --git a/activerecord/test/models/dog_lover.rb b/activerecord/test/models/dog_lover.rb
index 75e43bda8a..2c5be94aea 100644
--- a/activerecord/test/models/dog_lover.rb
+++ b/activerecord/test/models/dog_lover.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class DogLover < ActiveRecord::Base
   has_many :trained_dogs, class_name: "Dog", foreign_key: :trainer_id, dependent: :destroy
   has_many :bred_dogs, class_name: "Dog", foreign_key: :breeder_id
diff --git a/activerecord/test/models/doubloon.rb b/activerecord/test/models/doubloon.rb
index e18868e022..7272504666 100644
--- a/activerecord/test/models/doubloon.rb
+++ b/activerecord/test/models/doubloon.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AbstractDoubloon < ActiveRecord::Base
   # This has functionality that might be shared by multiple classes.
 
diff --git a/activerecord/test/models/drink_designer.rb b/activerecord/test/models/drink_designer.rb
index 9de6e3d618..2db968ef11 100644
--- a/activerecord/test/models/drink_designer.rb
+++ b/activerecord/test/models/drink_designer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class DrinkDesigner < ActiveRecord::Base
   has_one :chef, as: :employable
 end
diff --git a/activerecord/test/models/edge.rb b/activerecord/test/models/edge.rb
index 9711ea6da9..e61d25c9bc 100644
--- a/activerecord/test/models/edge.rb
+++ b/activerecord/test/models/edge.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # This class models an edge in a directed graph.
 class Edge < ActiveRecord::Base
   belongs_to :source, class_name: "Vertex", foreign_key: "source_id"
diff --git a/activerecord/test/models/electron.rb b/activerecord/test/models/electron.rb
index 1828d173bb..6fc270673f 100644
--- a/activerecord/test/models/electron.rb
+++ b/activerecord/test/models/electron.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Electron < ActiveRecord::Base
   belongs_to :molecule
 
diff --git a/activerecord/test/models/engine.rb b/activerecord/test/models/engine.rb
index 144bf7159b..eada171f6a 100644
--- a/activerecord/test/models/engine.rb
+++ b/activerecord/test/models/engine.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Engine < ActiveRecord::Base
   belongs_to :my_car, class_name: "Car", foreign_key: "car_id",  counter_cache: :engines_count
 end
diff --git a/activerecord/test/models/entrant.rb b/activerecord/test/models/entrant.rb
index 77095e28c5..4682ce48c8 100644
--- a/activerecord/test/models/entrant.rb
+++ b/activerecord/test/models/entrant.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Entrant < ActiveRecord::Base
   belongs_to :course
 end
diff --git a/activerecord/test/models/essay.rb b/activerecord/test/models/essay.rb
index 302a862907..1f9772870e 100644
--- a/activerecord/test/models/essay.rb
+++ b/activerecord/test/models/essay.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Essay < ActiveRecord::Base
   belongs_to :author
   belongs_to :writer, primary_key: :name, polymorphic: true
diff --git a/activerecord/test/models/event.rb b/activerecord/test/models/event.rb
index ac9bc63f34..365ab32b0b 100644
--- a/activerecord/test/models/event.rb
+++ b/activerecord/test/models/event.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Event < ActiveRecord::Base
   validates_uniqueness_of :title
 end
diff --git a/activerecord/test/models/eye.rb b/activerecord/test/models/eye.rb
index a7410e8aa9..f53c34e4b1 100644
--- a/activerecord/test/models/eye.rb
+++ b/activerecord/test/models/eye.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Eye < ActiveRecord::Base
   attr_reader :after_create_callbacks_stack
   attr_reader :after_update_callbacks_stack
diff --git a/activerecord/test/models/face.rb b/activerecord/test/models/face.rb
index 3c78bf9284..5913bfa969 100644
--- a/activerecord/test/models/face.rb
+++ b/activerecord/test/models/face.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Face < ActiveRecord::Base
   belongs_to :man, inverse_of: :face
   belongs_to :polymorphic_man, polymorphic: true, inverse_of: :polymorphic_face
diff --git a/activerecord/test/models/family.rb b/activerecord/test/models/family.rb
index 24bc3cc457..5ae5a78c95 100644
--- a/activerecord/test/models/family.rb
+++ b/activerecord/test/models/family.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Family < ActiveRecord::Base
   has_many :family_trees, -> { where(token: nil) }
   has_many :members, through: :family_trees
diff --git a/activerecord/test/models/family_tree.rb b/activerecord/test/models/family_tree.rb
index 94a905246a..cd9829fedd 100644
--- a/activerecord/test/models/family_tree.rb
+++ b/activerecord/test/models/family_tree.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class FamilyTree < ActiveRecord::Base
   belongs_to :member, class_name: "User", foreign_key: "member_id"
   belongs_to :family
diff --git a/activerecord/test/models/friendship.rb b/activerecord/test/models/friendship.rb
index e9ecfe7e25..578382b494 100644
--- a/activerecord/test/models/friendship.rb
+++ b/activerecord/test/models/friendship.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Friendship < ActiveRecord::Base
   belongs_to :friend, class_name: "Person"
   # friend_too exists to test a bug, and probably shouldn't be used elsewhere
diff --git a/activerecord/test/models/guid.rb b/activerecord/test/models/guid.rb
index 8653b617b1..05653ba498 100644
--- a/activerecord/test/models/guid.rb
+++ b/activerecord/test/models/guid.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Guid < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/guitar.rb b/activerecord/test/models/guitar.rb
index a1a3226272..cd068ff53d 100644
--- a/activerecord/test/models/guitar.rb
+++ b/activerecord/test/models/guitar.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Guitar < ActiveRecord::Base
   has_many :tuning_pegs, index_errors: true
   accepts_nested_attributes_for :tuning_pegs
diff --git a/activerecord/test/models/hotel.rb b/activerecord/test/models/hotel.rb
index 1d20d17e3b..7bc717c891 100644
--- a/activerecord/test/models/hotel.rb
+++ b/activerecord/test/models/hotel.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hotel < ActiveRecord::Base
   has_many :departments
   has_many :chefs, through: :departments
diff --git a/activerecord/test/models/image.rb b/activerecord/test/models/image.rb
index 1efe679022..7ae8e4a7f6 100644
--- a/activerecord/test/models/image.rb
+++ b/activerecord/test/models/image.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Image < ActiveRecord::Base
   belongs_to :imageable, foreign_key: :imageable_identifier, foreign_type: :imageable_class
 end
diff --git a/activerecord/test/models/interest.rb b/activerecord/test/models/interest.rb
index 10e855be4d..ec79416ee7 100644
--- a/activerecord/test/models/interest.rb
+++ b/activerecord/test/models/interest.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Interest < ActiveRecord::Base
   belongs_to :man, inverse_of: :interests
   belongs_to :polymorphic_man, polymorphic: true, inverse_of: :polymorphic_interests
diff --git a/activerecord/test/models/invoice.rb b/activerecord/test/models/invoice.rb
index df37e2a9e1..4be5a00193 100644
--- a/activerecord/test/models/invoice.rb
+++ b/activerecord/test/models/invoice.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Invoice < ActiveRecord::Base
   has_many :line_items, autosave: true
   before_save { |record| record.balance = record.line_items.map(&:amount).sum }
diff --git a/activerecord/test/models/item.rb b/activerecord/test/models/item.rb
index 86a1fc625e..336fb1769a 100644
--- a/activerecord/test/models/item.rb
+++ b/activerecord/test/models/item.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class AbstractItem < ActiveRecord::Base
   self.abstract_class = true
   has_one :tagging, as: :taggable
diff --git a/activerecord/test/models/job.rb b/activerecord/test/models/job.rb
index 6c4dff4bcd..bbaef2792c 100644
--- a/activerecord/test/models/job.rb
+++ b/activerecord/test/models/job.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Job < ActiveRecord::Base
   has_many :references
   has_many :people, through: :references
diff --git a/activerecord/test/models/joke.rb b/activerecord/test/models/joke.rb
index 5c2443036a..eeb5818a1f 100644
--- a/activerecord/test/models/joke.rb
+++ b/activerecord/test/models/joke.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Joke < ActiveRecord::Base
   self.table_name = "funny_jokes"
 end
diff --git a/activerecord/test/models/keyboard.rb b/activerecord/test/models/keyboard.rb
index d179de8e1c..bcede53ec9 100644
--- a/activerecord/test/models/keyboard.rb
+++ b/activerecord/test/models/keyboard.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Keyboard < ActiveRecord::Base
   self.primary_key = "key_number"
 end
diff --git a/activerecord/test/models/legacy_thing.rb b/activerecord/test/models/legacy_thing.rb
index 948d575bb8..eead181a0e 100644
--- a/activerecord/test/models/legacy_thing.rb
+++ b/activerecord/test/models/legacy_thing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class LegacyThing < ActiveRecord::Base
   self.locking_column = :version
 end
diff --git a/activerecord/test/models/lesson.rb b/activerecord/test/models/lesson.rb
index 086ff55b42..4c88153068 100644
--- a/activerecord/test/models/lesson.rb
+++ b/activerecord/test/models/lesson.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class LessonError < Exception
 end
 
diff --git a/activerecord/test/models/line_item.rb b/activerecord/test/models/line_item.rb
index 1ef2eda97a..93f7cceb13 100644
--- a/activerecord/test/models/line_item.rb
+++ b/activerecord/test/models/line_item.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class LineItem < ActiveRecord::Base
   belongs_to :invoice, touch: true
 end
diff --git a/activerecord/test/models/liquid.rb b/activerecord/test/models/liquid.rb
index 9440292c78..69d4d7df1a 100644
--- a/activerecord/test/models/liquid.rb
+++ b/activerecord/test/models/liquid.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Liquid < ActiveRecord::Base
   self.table_name = :liquid
   has_many :molecules, -> { distinct }
diff --git a/activerecord/test/models/man.rb b/activerecord/test/models/man.rb
index bf81aa9fc6..d2436a735c 100644
--- a/activerecord/test/models/man.rb
+++ b/activerecord/test/models/man.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Man < ActiveRecord::Base
   has_one :face, inverse_of: :man
   has_one :polymorphic_face, class_name: "Face", as: :polymorphic_man, inverse_of: :polymorphic_man
diff --git a/activerecord/test/models/matey.rb b/activerecord/test/models/matey.rb
index 00311f78fe..80ee5f47c5 100644
--- a/activerecord/test/models/matey.rb
+++ b/activerecord/test/models/matey.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Matey < ActiveRecord::Base
   belongs_to :pirate
   belongs_to :target, class_name: "Pirate"
diff --git a/activerecord/test/models/member.rb b/activerecord/test/models/member.rb
index 99a037e0f6..36f2461b84 100644
--- a/activerecord/test/models/member.rb
+++ b/activerecord/test/models/member.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Member < ActiveRecord::Base
   has_one :current_membership
   has_one :selected_membership
diff --git a/activerecord/test/models/member_detail.rb b/activerecord/test/models/member_detail.rb
index 8311d202da..157130986c 100644
--- a/activerecord/test/models/member_detail.rb
+++ b/activerecord/test/models/member_detail.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class MemberDetail < ActiveRecord::Base
   belongs_to :member, inverse_of: false
   belongs_to :organization
diff --git a/activerecord/test/models/member_type.rb b/activerecord/test/models/member_type.rb
index 3c159a885a..a13561c72a 100644
--- a/activerecord/test/models/member_type.rb
+++ b/activerecord/test/models/member_type.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class MemberType < ActiveRecord::Base
   has_many :members
 end
diff --git a/activerecord/test/models/membership.rb b/activerecord/test/models/membership.rb
index bd957f1de8..0f8be0ad85 100644
--- a/activerecord/test/models/membership.rb
+++ b/activerecord/test/models/membership.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Membership < ActiveRecord::Base
   enum type: %i(Membership CurrentMembership SuperMembership SelectedMembership TenantMembership)
   belongs_to :member
diff --git a/activerecord/test/models/mentor.rb b/activerecord/test/models/mentor.rb
index 9e52d39e46..66504b4e91 100644
--- a/activerecord/test/models/mentor.rb
+++ b/activerecord/test/models/mentor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Mentor < ActiveRecord::Base
   has_many :developers
 end
diff --git a/activerecord/test/models/minimalistic.rb b/activerecord/test/models/minimalistic.rb
index c31eea65c9..2e3f8e081a 100644
--- a/activerecord/test/models/minimalistic.rb
+++ b/activerecord/test/models/minimalistic.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Minimalistic < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/minivan.rb b/activerecord/test/models/minivan.rb
index 4d04d808a9..e9b05dadf2 100644
--- a/activerecord/test/models/minivan.rb
+++ b/activerecord/test/models/minivan.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Minivan < ActiveRecord::Base
   self.primary_key = :minivan_id
 
diff --git a/activerecord/test/models/mixed_case_monkey.rb b/activerecord/test/models/mixed_case_monkey.rb
index 552de2c18c..1c35006665 100644
--- a/activerecord/test/models/mixed_case_monkey.rb
+++ b/activerecord/test/models/mixed_case_monkey.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class MixedCaseMonkey < ActiveRecord::Base
   belongs_to :man
 end
diff --git a/activerecord/test/models/mocktail_designer.rb b/activerecord/test/models/mocktail_designer.rb
index fc9fc4c942..77b44651a3 100644
--- a/activerecord/test/models/mocktail_designer.rb
+++ b/activerecord/test/models/mocktail_designer.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class MocktailDesigner < DrinkDesigner
 end
diff --git a/activerecord/test/models/molecule.rb b/activerecord/test/models/molecule.rb
index 8e0f6eb6ee..26870c8f88 100644
--- a/activerecord/test/models/molecule.rb
+++ b/activerecord/test/models/molecule.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Molecule < ActiveRecord::Base
   belongs_to :liquid
   has_many :electrons
diff --git a/activerecord/test/models/movie.rb b/activerecord/test/models/movie.rb
index fc620656e4..0302abad1e 100644
--- a/activerecord/test/models/movie.rb
+++ b/activerecord/test/models/movie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Movie < ActiveRecord::Base
   self.primary_key = "movieid"
 
diff --git a/activerecord/test/models/node.rb b/activerecord/test/models/node.rb
index 3422a9ea3a..459ea8cf95 100644
--- a/activerecord/test/models/node.rb
+++ b/activerecord/test/models/node.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Node < ActiveRecord::Base
   belongs_to :tree, touch: true
   belongs_to :parent,   class_name: "Node", touch: true, optional: true
diff --git a/activerecord/test/models/non_primary_key.rb b/activerecord/test/models/non_primary_key.rb
index 4a5fdb88b8..1cafb09608 100644
--- a/activerecord/test/models/non_primary_key.rb
+++ b/activerecord/test/models/non_primary_key.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class NonPrimaryKey < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/notification.rb b/activerecord/test/models/notification.rb
index 9e8ce108d5..82edc64b68 100644
--- a/activerecord/test/models/notification.rb
+++ b/activerecord/test/models/notification.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Notification < ActiveRecord::Base
   validates_presence_of :message
 end
diff --git a/activerecord/test/models/numeric_data.rb b/activerecord/test/models/numeric_data.rb
index 8998495101..c6e025a9ce 100644
--- a/activerecord/test/models/numeric_data.rb
+++ b/activerecord/test/models/numeric_data.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class NumericData < ActiveRecord::Base
   self.table_name = "numeric_data"
   # Decimal columns with 0 scale being automatically treated as integers
diff --git a/activerecord/test/models/order.rb b/activerecord/test/models/order.rb
index c8693586a0..699be53959 100644
--- a/activerecord/test/models/order.rb
+++ b/activerecord/test/models/order.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Order < ActiveRecord::Base
   belongs_to :billing, class_name: "Customer", foreign_key: "billing_customer_id"
   belongs_to :shipping, class_name: "Customer", foreign_key: "shipping_customer_id"
diff --git a/activerecord/test/models/organization.rb b/activerecord/test/models/organization.rb
index c08a01994b..462830dadc 100644
--- a/activerecord/test/models/organization.rb
+++ b/activerecord/test/models/organization.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Organization < ActiveRecord::Base
   has_many :member_details
   has_many :members, through: :member_details
diff --git a/activerecord/test/models/other_dog.rb b/activerecord/test/models/other_dog.rb
index a836d9de1a..418caf34be 100644
--- a/activerecord/test/models/other_dog.rb
+++ b/activerecord/test/models/other_dog.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_dependency "models/arunit2_model"
 
 class OtherDog < ARUnit2Model
diff --git a/activerecord/test/models/owner.rb b/activerecord/test/models/owner.rb
index f6190fe5af..21fc9b6eb8 100644
--- a/activerecord/test/models/owner.rb
+++ b/activerecord/test/models/owner.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Owner < ActiveRecord::Base
   self.primary_key = :owner_id
   has_many :pets, -> { order "pets.name desc" }
diff --git a/activerecord/test/models/parrot.rb b/activerecord/test/models/parrot.rb
index 4a027fa0bb..1e5f9285a8 100644
--- a/activerecord/test/models/parrot.rb
+++ b/activerecord/test/models/parrot.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Parrot < ActiveRecord::Base
   self.inheritance_column = :parrot_sti_class
 
diff --git a/activerecord/test/models/person.rb b/activerecord/test/models/person.rb
index c1ea965a6e..18994d6f18 100644
--- a/activerecord/test/models/person.rb
+++ b/activerecord/test/models/person.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Person < ActiveRecord::Base
   has_many :readers
   has_many :secure_readers
diff --git a/activerecord/test/models/personal_legacy_thing.rb b/activerecord/test/models/personal_legacy_thing.rb
index 1a70aa7e7b..adde7a504a 100644
--- a/activerecord/test/models/personal_legacy_thing.rb
+++ b/activerecord/test/models/personal_legacy_thing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PersonalLegacyThing < ActiveRecord::Base
   self.locking_column = :version
   belongs_to :person, counter_cache: true
diff --git a/activerecord/test/models/pet.rb b/activerecord/test/models/pet.rb
index f0d82ddfc9..51a3e42815 100644
--- a/activerecord/test/models/pet.rb
+++ b/activerecord/test/models/pet.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Pet < ActiveRecord::Base
   attr_accessor :current_user
 
diff --git a/activerecord/test/models/pet_treasure.rb b/activerecord/test/models/pet_treasure.rb
index 2d552bf50c..1fe7807ffe 100644
--- a/activerecord/test/models/pet_treasure.rb
+++ b/activerecord/test/models/pet_treasure.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PetTreasure < ActiveRecord::Base
   self.table_name = "pets_treasures"
 
diff --git a/activerecord/test/models/pirate.rb b/activerecord/test/models/pirate.rb
index 21fe1b7847..c532ab426e 100644
--- a/activerecord/test/models/pirate.rb
+++ b/activerecord/test/models/pirate.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Pirate < ActiveRecord::Base
   belongs_to :parrot, validate: true
   belongs_to :non_validated_parrot, class_name: "Parrot"
diff --git a/activerecord/test/models/possession.rb b/activerecord/test/models/possession.rb
index d8c2a5f21f..0226336c16 100644
--- a/activerecord/test/models/possession.rb
+++ b/activerecord/test/models/possession.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Possession < ActiveRecord::Base
   self.table_name = "having"
 end
diff --git a/activerecord/test/models/post.rb b/activerecord/test/models/post.rb
index 534ba47c98..ed64e0ee52 100644
--- a/activerecord/test/models/post.rb
+++ b/activerecord/test/models/post.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Post < ActiveRecord::Base
   class CategoryPost < ActiveRecord::Base
     self.table_name = "categories_posts"
diff --git a/activerecord/test/models/price_estimate.rb b/activerecord/test/models/price_estimate.rb
index abdff640c7..ce086e40a3 100644
--- a/activerecord/test/models/price_estimate.rb
+++ b/activerecord/test/models/price_estimate.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class PriceEstimate < ActiveRecord::Base
   belongs_to :estimate_of, polymorphic: true
   belongs_to :thing, polymorphic: true
diff --git a/activerecord/test/models/professor.rb b/activerecord/test/models/professor.rb
index 6ec183bb07..4dfb1a9602 100644
--- a/activerecord/test/models/professor.rb
+++ b/activerecord/test/models/professor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_dependency "models/arunit2_model"
 
 class Professor < ARUnit2Model
diff --git a/activerecord/test/models/project.rb b/activerecord/test/models/project.rb
index e30f1d729a..4fbd986e40 100644
--- a/activerecord/test/models/project.rb
+++ b/activerecord/test/models/project.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Project < ActiveRecord::Base
   belongs_to :mentor
   has_and_belongs_to_many :developers, -> { distinct.order "developers.name desc, developers.id desc" }
diff --git a/activerecord/test/models/publisher.rb b/activerecord/test/models/publisher.rb
index 55cf0e42a5..0d4a7f9235 100644
--- a/activerecord/test/models/publisher.rb
+++ b/activerecord/test/models/publisher.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 module Publisher
 end
diff --git a/activerecord/test/models/publisher/article.rb b/activerecord/test/models/publisher/article.rb
index 43b88117e0..d73a8eb936 100644
--- a/activerecord/test/models/publisher/article.rb
+++ b/activerecord/test/models/publisher/article.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Publisher::Article < ActiveRecord::Base
   has_and_belongs_to_many :magazines
   has_and_belongs_to_many :tags
diff --git a/activerecord/test/models/publisher/magazine.rb b/activerecord/test/models/publisher/magazine.rb
index 25e34aca99..82e1a14008 100644
--- a/activerecord/test/models/publisher/magazine.rb
+++ b/activerecord/test/models/publisher/magazine.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Publisher::Magazine < ActiveRecord::Base
   has_and_belongs_to_many :articles
 end
diff --git a/activerecord/test/models/randomly_named_c1.rb b/activerecord/test/models/randomly_named_c1.rb
index 1cd2ca1bb8..d4be1e13b4 100644
--- a/activerecord/test/models/randomly_named_c1.rb
+++ b/activerecord/test/models/randomly_named_c1.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
-class ClassNameThatDoesNotFollowCONVENTIONS < ActiveRecord::Base
-  self.table_name = :randomly_named_table1
-end
+class ClassNameThatDoesNotFollowCONVENTIONS < ActiveRecord::Base
+  self.table_name = :randomly_named_table1
+end
diff --git a/activerecord/test/models/rating.rb b/activerecord/test/models/rating.rb
index 753df20e8d..7420821db0 100644
--- a/activerecord/test/models/rating.rb
+++ b/activerecord/test/models/rating.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Rating < ActiveRecord::Base
   belongs_to :comment
   has_many :taggings, as: :taggable
diff --git a/activerecord/test/models/reader.rb b/activerecord/test/models/reader.rb
index 05a17eca8b..7c5a159fe0 100644
--- a/activerecord/test/models/reader.rb
+++ b/activerecord/test/models/reader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Reader < ActiveRecord::Base
   belongs_to :post
   belongs_to :person, inverse_of: :readers
diff --git a/activerecord/test/models/recipe.rb b/activerecord/test/models/recipe.rb
index 8f81807340..c387230603 100644
--- a/activerecord/test/models/recipe.rb
+++ b/activerecord/test/models/recipe.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Recipe < ActiveRecord::Base
   belongs_to :chef
 end
diff --git a/activerecord/test/models/record.rb b/activerecord/test/models/record.rb
index 81d5baa6b1..f77ac9fc03 100644
--- a/activerecord/test/models/record.rb
+++ b/activerecord/test/models/record.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Record < ActiveRecord::Base
 end
diff --git a/activerecord/test/models/reference.rb b/activerecord/test/models/reference.rb
index 5daa48d8ce..e2bb980fed 100644
--- a/activerecord/test/models/reference.rb
+++ b/activerecord/test/models/reference.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Reference < ActiveRecord::Base
   belongs_to :person
   belongs_to :job
diff --git a/activerecord/test/models/reply.rb b/activerecord/test/models/reply.rb
index f3372e81fd..a2d169292a 100644
--- a/activerecord/test/models/reply.rb
+++ b/activerecord/test/models/reply.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "models/topic"
 
 class Reply < Topic
diff --git a/activerecord/test/models/ship.rb b/activerecord/test/models/ship.rb
index 0ee8da78db..77a7b22315 100644
--- a/activerecord/test/models/ship.rb
+++ b/activerecord/test/models/ship.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Ship < ActiveRecord::Base
   self.record_timestamps = false
 
diff --git a/activerecord/test/models/ship_part.rb b/activerecord/test/models/ship_part.rb
index 67c089a7d0..1a633b8d77 100644
--- a/activerecord/test/models/ship_part.rb
+++ b/activerecord/test/models/ship_part.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ShipPart < ActiveRecord::Base
   belongs_to :ship
   has_many :trinkets, class_name: "Treasure", as: :looter
diff --git a/activerecord/test/models/shop.rb b/activerecord/test/models/shop.rb
index 819af853ad..f9d23d13b0 100644
--- a/activerecord/test/models/shop.rb
+++ b/activerecord/test/models/shop.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Shop
   class Collection < ActiveRecord::Base
     has_many :products, dependent: :nullify
diff --git a/activerecord/test/models/shop_account.rb b/activerecord/test/models/shop_account.rb
index cb00e202f0..1580e8b20c 100644
--- a/activerecord/test/models/shop_account.rb
+++ b/activerecord/test/models/shop_account.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ShopAccount < ActiveRecord::Base
   belongs_to :customer
   belongs_to :customer_carrier
diff --git a/activerecord/test/models/speedometer.rb b/activerecord/test/models/speedometer.rb
index b34e3c16fc..497c3aba9a 100644
--- a/activerecord/test/models/speedometer.rb
+++ b/activerecord/test/models/speedometer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Speedometer < ActiveRecord::Base
   self.primary_key = :speedometer_id
   belongs_to :dashboard
diff --git a/activerecord/test/models/sponsor.rb b/activerecord/test/models/sponsor.rb
index cfcd1f762a..3f142b25fe 100644
--- a/activerecord/test/models/sponsor.rb
+++ b/activerecord/test/models/sponsor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Sponsor < ActiveRecord::Base
   belongs_to :sponsor_club, class_name: "Club", foreign_key: "club_id"
   belongs_to :sponsorable, polymorphic: true
diff --git a/activerecord/test/models/string_key_object.rb b/activerecord/test/models/string_key_object.rb
index 94c7fb7582..f084ec1bdc 100644
--- a/activerecord/test/models/string_key_object.rb
+++ b/activerecord/test/models/string_key_object.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class StringKeyObject < ActiveRecord::Base
   self.primary_key = :id
 end
diff --git a/activerecord/test/models/student.rb b/activerecord/test/models/student.rb
index 888a0ae481..28a0b6c99b 100644
--- a/activerecord/test/models/student.rb
+++ b/activerecord/test/models/student.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Student < ActiveRecord::Base
   has_and_belongs_to_many :lessons
   belongs_to :college
diff --git a/activerecord/test/models/subscriber.rb b/activerecord/test/models/subscriber.rb
index 8ef679486d..a820329003 100644
--- a/activerecord/test/models/subscriber.rb
+++ b/activerecord/test/models/subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Subscriber < ActiveRecord::Base
   self.primary_key = "nick"
   has_many :subscriptions
diff --git a/activerecord/test/models/subscription.rb b/activerecord/test/models/subscription.rb
index e210836413..1cedf6deae 100644
--- a/activerecord/test/models/subscription.rb
+++ b/activerecord/test/models/subscription.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Subscription < ActiveRecord::Base
   belongs_to :subscriber, counter_cache: :books_count
   belongs_to :book
diff --git a/activerecord/test/models/tag.rb b/activerecord/test/models/tag.rb
index 6c59dc6183..c907aea10f 100644
--- a/activerecord/test/models/tag.rb
+++ b/activerecord/test/models/tag.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Tag < ActiveRecord::Base
   has_many :taggings
   has_many :taggables, through: :taggings
diff --git a/activerecord/test/models/tagging.rb b/activerecord/test/models/tagging.rb
index 0060b96f73..f739b4a197 100644
--- a/activerecord/test/models/tagging.rb
+++ b/activerecord/test/models/tagging.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # test that attr_readonly isn't called on the :taggable polymorphic association
 module Taggable
 end
diff --git a/activerecord/test/models/task.rb b/activerecord/test/models/task.rb
index 1ab1048bdb..e36989dd56 100644
--- a/activerecord/test/models/task.rb
+++ b/activerecord/test/models/task.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Task < ActiveRecord::Base
   def updated_at
     ending
diff --git a/activerecord/test/models/topic.rb b/activerecord/test/models/topic.rb
index a74263428b..d9381ac9cf 100644
--- a/activerecord/test/models/topic.rb
+++ b/activerecord/test/models/topic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Topic < ActiveRecord::Base
   scope :base, -> { all }
   scope :written_before, lambda { |time|
diff --git a/activerecord/test/models/toy.rb b/activerecord/test/models/toy.rb
index 97b877caea..ddc7048a56 100644
--- a/activerecord/test/models/toy.rb
+++ b/activerecord/test/models/toy.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Toy < ActiveRecord::Base
   self.primary_key = :toy_id
   belongs_to :pet
diff --git a/activerecord/test/models/traffic_light.rb b/activerecord/test/models/traffic_light.rb
index 595b1cb716..a6b7edb882 100644
--- a/activerecord/test/models/traffic_light.rb
+++ b/activerecord/test/models/traffic_light.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class TrafficLight < ActiveRecord::Base
   serialize :state, Array
   serialize :long_state, Array
diff --git a/activerecord/test/models/treasure.rb b/activerecord/test/models/treasure.rb
index 3f2162a63d..fb2a5d44e2 100644
--- a/activerecord/test/models/treasure.rb
+++ b/activerecord/test/models/treasure.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Treasure < ActiveRecord::Base
   has_and_belongs_to_many :parrots
   belongs_to :looter, polymorphic: true
diff --git a/activerecord/test/models/treaty.rb b/activerecord/test/models/treaty.rb
index a6c227c84e..373cd48f71 100644
--- a/activerecord/test/models/treaty.rb
+++ b/activerecord/test/models/treaty.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Treaty < ActiveRecord::Base
   self.primary_key = :treaty_id
 
diff --git a/activerecord/test/models/tree.rb b/activerecord/test/models/tree.rb
index 844c2693ec..dc29cccc9c 100644
--- a/activerecord/test/models/tree.rb
+++ b/activerecord/test/models/tree.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Tree < ActiveRecord::Base
   has_many :nodes, dependent: :destroy
 end
diff --git a/activerecord/test/models/tuning_peg.rb b/activerecord/test/models/tuning_peg.rb
index 4fee61c565..1252d6dc1d 100644
--- a/activerecord/test/models/tuning_peg.rb
+++ b/activerecord/test/models/tuning_peg.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class TuningPeg < ActiveRecord::Base
   belongs_to :guitar
   validates_numericality_of :pitch
diff --git a/activerecord/test/models/tyre.rb b/activerecord/test/models/tyre.rb
index 03ba9d3364..e50a21ca68 100644
--- a/activerecord/test/models/tyre.rb
+++ b/activerecord/test/models/tyre.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Tyre < ActiveRecord::Base
   belongs_to :car
 
diff --git a/activerecord/test/models/user.rb b/activerecord/test/models/user.rb
index 3ceacc5e7f..5089a795f4 100644
--- a/activerecord/test/models/user.rb
+++ b/activerecord/test/models/user.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "models/job"
 
 class User < ActiveRecord::Base
diff --git a/activerecord/test/models/uuid_child.rb b/activerecord/test/models/uuid_child.rb
index eaa380ba20..a3d0962ad6 100644
--- a/activerecord/test/models/uuid_child.rb
+++ b/activerecord/test/models/uuid_child.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class UuidChild < ActiveRecord::Base
   belongs_to :uuid_parent
 end
diff --git a/activerecord/test/models/uuid_item.rb b/activerecord/test/models/uuid_item.rb
index bb152c381a..2353e40213 100644
--- a/activerecord/test/models/uuid_item.rb
+++ b/activerecord/test/models/uuid_item.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class UuidItem < ActiveRecord::Base
 end
 
diff --git a/activerecord/test/models/uuid_parent.rb b/activerecord/test/models/uuid_parent.rb
index f654a964e0..5634f22d0c 100644
--- a/activerecord/test/models/uuid_parent.rb
+++ b/activerecord/test/models/uuid_parent.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class UuidParent < ActiveRecord::Base
   has_many :uuid_children
 end
diff --git a/activerecord/test/models/vegetables.rb b/activerecord/test/models/vegetables.rb
index c97b6b939d..a4590d06e0 100644
--- a/activerecord/test/models/vegetables.rb
+++ b/activerecord/test/models/vegetables.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Vegetable < ActiveRecord::Base
   validates_presence_of :name
 
diff --git a/activerecord/test/models/vehicle.rb b/activerecord/test/models/vehicle.rb
index 61e18b2e40..855bc4e325 100644
--- a/activerecord/test/models/vehicle.rb
+++ b/activerecord/test/models/vehicle.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Vehicle < ActiveRecord::Base
   self.abstract_class = true
   default_scope -> { where("tires_count IS NOT NULL") }
diff --git a/activerecord/test/models/vertex.rb b/activerecord/test/models/vertex.rb
index b90f71cec6..3d19433b6f 100644
--- a/activerecord/test/models/vertex.rb
+++ b/activerecord/test/models/vertex.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # This class models a vertex in a directed graph.
 class Vertex < ActiveRecord::Base
   has_many :sink_edges, class_name: "Edge", foreign_key: "source_id"
diff --git a/activerecord/test/models/warehouse_thing.rb b/activerecord/test/models/warehouse_thing.rb
index 684af49f2f..f20bd1a245 100644
--- a/activerecord/test/models/warehouse_thing.rb
+++ b/activerecord/test/models/warehouse_thing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WarehouseThing < ActiveRecord::Base
   self.table_name = "warehouse-things"
 
diff --git a/activerecord/test/models/wheel.rb b/activerecord/test/models/wheel.rb
index f2fecf9545..cba2b3e518 100644
--- a/activerecord/test/models/wheel.rb
+++ b/activerecord/test/models/wheel.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Wheel < ActiveRecord::Base
   belongs_to :wheelable, polymorphic: true, counter_cache: true
 end
diff --git a/activerecord/test/models/without_table.rb b/activerecord/test/models/without_table.rb
index 77a471e682..7c0fc286e1 100644
--- a/activerecord/test/models/without_table.rb
+++ b/activerecord/test/models/without_table.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class WithoutTable < ActiveRecord::Base
   default_scope -> { where(published: true) }
 end
diff --git a/activerecord/test/models/zine.rb b/activerecord/test/models/zine.rb
index 4c72cbb242..3f2b348b46 100644
--- a/activerecord/test/models/zine.rb
+++ b/activerecord/test/models/zine.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Zine < ActiveRecord::Base
   has_many :interests, inverse_of: :zine
 end
diff --git a/activerecord/test/schema/mysql2_specific_schema.rb b/activerecord/test/schema/mysql2_specific_schema.rb
index f55b030ebf..90a314c83c 100644
--- a/activerecord/test/schema/mysql2_specific_schema.rb
+++ b/activerecord/test/schema/mysql2_specific_schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveRecord::Schema.define do
 
   if ActiveRecord::Base.connection.version >= "5.6.0"
diff --git a/activerecord/test/schema/oracle_specific_schema.rb b/activerecord/test/schema/oracle_specific_schema.rb
index 9129981708..264d9b8910 100644
--- a/activerecord/test/schema/oracle_specific_schema.rb
+++ b/activerecord/test/schema/oracle_specific_schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveRecord::Schema.define do
 
   execute "drop table test_oracle_defaults" rescue nil
diff --git a/activerecord/test/schema/postgresql_specific_schema.rb b/activerecord/test/schema/postgresql_specific_schema.rb
index dbf0972b4b..e56e8fa36a 100644
--- a/activerecord/test/schema/postgresql_specific_schema.rb
+++ b/activerecord/test/schema/postgresql_specific_schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveRecord::Schema.define do
 
   enable_extension!("uuid-ossp", ActiveRecord::Base.connection)
diff --git a/activerecord/test/schema/schema.rb b/activerecord/test/schema/schema.rb
index d4f029ff16..f534e9c00e 100644
--- a/activerecord/test/schema/schema.rb
+++ b/activerecord/test/schema/schema.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ActiveRecord::Schema.define do
   # ------------------------------------------------------------------- #
   #                                                                     #
diff --git a/activerecord/test/support/config.rb b/activerecord/test/support/config.rb
index e385d7fff7..aaff408b41 100644
--- a/activerecord/test/support/config.rb
+++ b/activerecord/test/support/config.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 require "erb"
 require "fileutils"
diff --git a/activerecord/test/support/connection.rb b/activerecord/test/support/connection.rb
index 06a037d3d0..1a609e13c3 100644
--- a/activerecord/test/support/connection.rb
+++ b/activerecord/test/support/connection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/logger"
 require "models/college"
 require "models/course"
diff --git a/activerecord/test/support/connection_helper.rb b/activerecord/test/support/connection_helper.rb
index 5e37a4a991..4a19e5df44 100644
--- a/activerecord/test/support/connection_helper.rb
+++ b/activerecord/test/support/connection_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ConnectionHelper
   def run_without_connection
     original_connection = ActiveRecord::Base.remove_connection
diff --git a/activerecord/test/support/ddl_helper.rb b/activerecord/test/support/ddl_helper.rb
index 3a07316637..43cb235e01 100644
--- a/activerecord/test/support/ddl_helper.rb
+++ b/activerecord/test/support/ddl_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module DdlHelper
   def with_example_table(connection, table_name, definition = nil)
     connection.execute("CREATE TABLE #{table_name}(#{definition})")
diff --git a/activerecord/test/support/schema_dumping_helper.rb b/activerecord/test/support/schema_dumping_helper.rb
index 1a3f67f3ed..666c1b6a14 100644
--- a/activerecord/test/support/schema_dumping_helper.rb
+++ b/activerecord/test/support/schema_dumping_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module SchemaDumpingHelper
   def dump_table_schema(table, connection = ActiveRecord::Base.connection)
     old_ignore_tables = ActiveRecord::SchemaDumper.ignore_tables
diff --git a/activesupport/Rakefile b/activesupport/Rakefile
index 8691a34035..2e1c50cc3d 100644
--- a/activesupport/Rakefile
+++ b/activesupport/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 task default: :test
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index 4470de7ec1..16e912694c 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/activesupport/bin/generate_tables b/activesupport/bin/generate_tables
index 18199b2171..6f62593f14 100755
--- a/activesupport/bin/generate_tables
+++ b/activesupport/bin/generate_tables
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 begin
   $:.unshift(File.expand_path("../lib", __dir__))
diff --git a/activesupport/bin/test b/activesupport/bin/test
index c53377cc97..470ce93f10 100755
--- a/activesupport/bin/test
+++ b/activesupport/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/activesupport/lib/active_support.rb b/activesupport/lib/active_support.rb
index d99e8ac4a5..a667fbb54a 100644
--- a/activesupport/lib/active_support.rb
+++ b/activesupport/lib/active_support.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Copyright (c) 2005-2017 David Heinemeier Hansson
 #
diff --git a/activesupport/lib/active_support/all.rb b/activesupport/lib/active_support/all.rb
index 00f3639a42..72a23075af 100644
--- a/activesupport/lib/active_support/all.rb
+++ b/activesupport/lib/active_support/all.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "active_support/time"
 require "active_support/core_ext"
diff --git a/activesupport/lib/active_support/array_inquirer.rb b/activesupport/lib/active_support/array_inquirer.rb
index 6dad208e43..befa1746c6 100644
--- a/activesupport/lib/active_support/array_inquirer.rb
+++ b/activesupport/lib/active_support/array_inquirer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # Wrapping an array in an +ArrayInquirer+ gives a friendlier way to check
   # its string-like contents:
diff --git a/activesupport/lib/active_support/backtrace_cleaner.rb b/activesupport/lib/active_support/backtrace_cleaner.rb
index 1ffa2c05a2..e47c90597f 100644
--- a/activesupport/lib/active_support/backtrace_cleaner.rb
+++ b/activesupport/lib/active_support/backtrace_cleaner.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # Backtraces often include many lines that are not relevant for the context
   # under review. This makes it hard to find the signal amongst the backtrace
diff --git a/activesupport/lib/active_support/benchmarkable.rb b/activesupport/lib/active_support/benchmarkable.rb
index a5413932ef..70493c8da7 100644
--- a/activesupport/lib/active_support/benchmarkable.rb
+++ b/activesupport/lib/active_support/benchmarkable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/benchmark"
 require "active_support/core_ext/hash/keys"
 
diff --git a/activesupport/lib/active_support/builder.rb b/activesupport/lib/active_support/builder.rb
index a7582a4f00..0f010c5d96 100644
--- a/activesupport/lib/active_support/builder.rb
+++ b/activesupport/lib/active_support/builder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "builder"
 rescue LoadError => e
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb
index 1a037c1b07..3a95d07087 100644
--- a/activesupport/lib/active_support/cache.rb
+++ b/activesupport/lib/active_support/cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "zlib"
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/array/wrap"
diff --git a/activesupport/lib/active_support/cache/file_store.rb b/activesupport/lib/active_support/cache/file_store.rb
index 82f457dcc9..945f50a56e 100644
--- a/activesupport/lib/active_support/cache/file_store.rb
+++ b/activesupport/lib/active_support/cache/file_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/marshal"
 require "active_support/core_ext/file/atomic"
 require "active_support/core_ext/string/conversions"
diff --git a/activesupport/lib/active_support/cache/mem_cache_store.rb b/activesupport/lib/active_support/cache/mem_cache_store.rb
index 66d571adcb..06fa9f67ad 100644
--- a/activesupport/lib/active_support/cache/mem_cache_store.rb
+++ b/activesupport/lib/active_support/cache/mem_cache_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "dalli"
 rescue LoadError => e
diff --git a/activesupport/lib/active_support/cache/memory_store.rb b/activesupport/lib/active_support/cache/memory_store.rb
index e1fee72595..56fe1457d0 100644
--- a/activesupport/lib/active_support/cache/memory_store.rb
+++ b/activesupport/lib/active_support/cache/memory_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "monitor"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/cache/null_store.rb b/activesupport/lib/active_support/cache/null_store.rb
index 10ffbb84ea..550659fc56 100644
--- a/activesupport/lib/active_support/cache/null_store.rb
+++ b/activesupport/lib/active_support/cache/null_store.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Cache
     # A cache store implementation which doesn't actually store anything. Useful in
diff --git a/activesupport/lib/active_support/cache/strategy/local_cache.rb b/activesupport/lib/active_support/cache/strategy/local_cache.rb
index 2cd24bdfcc..69b3a93a05 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/duplicable"
 require "active_support/core_ext/string/inflections"
 require "active_support/per_thread_registry"
diff --git a/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb b/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb
index a53e268a92..4c3679e4bf 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rack/body_proxy"
 require "rack/utils"
 
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index d05fd9ee15..df18c35199 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/descendants_tracker"
 require "active_support/core_ext/array/extract_options"
diff --git a/activesupport/lib/active_support/concern.rb b/activesupport/lib/active_support/concern.rb
index f1dcda7dfa..0403eb70ca 100644
--- a/activesupport/lib/active_support/concern.rb
+++ b/activesupport/lib/active_support/concern.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # A typical module looks like this:
   #
diff --git a/activesupport/lib/active_support/concurrency/share_lock.rb b/activesupport/lib/active_support/concurrency/share_lock.rb
index 060b16f2d6..4318523b07 100644
--- a/activesupport/lib/active_support/concurrency/share_lock.rb
+++ b/activesupport/lib/active_support/concurrency/share_lock.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thread"
 require "monitor"
 
diff --git a/activesupport/lib/active_support/configurable.rb b/activesupport/lib/active_support/configurable.rb
index ab06921746..f72a893bcc 100644
--- a/activesupport/lib/active_support/configurable.rb
+++ b/activesupport/lib/active_support/configurable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/ordered_options"
 require "active_support/core_ext/array/extract_options"
diff --git a/activesupport/lib/active_support/core_ext.rb b/activesupport/lib/active_support/core_ext.rb
index 784cdc4a78..42e0acf66a 100644
--- a/activesupport/lib/active_support/core_ext.rb
+++ b/activesupport/lib/active_support/core_ext.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 Dir.glob(File.expand_path("core_ext/*.rb", __dir__)).each do |path|
   require path
 end
diff --git a/activesupport/lib/active_support/core_ext/array.rb b/activesupport/lib/active_support/core_ext/array.rb
index 3f58855902..e908386a1c 100644
--- a/activesupport/lib/active_support/core_ext/array.rb
+++ b/activesupport/lib/active_support/core_ext/array.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/wrap"
 require "active_support/core_ext/array/access"
 require "active_support/core_ext/array/conversions"
diff --git a/activesupport/lib/active_support/core_ext/array/access.rb b/activesupport/lib/active_support/core_ext/array/access.rb
index b6e576ad29..fca33c9d69 100644
--- a/activesupport/lib/active_support/core_ext/array/access.rb
+++ b/activesupport/lib/active_support/core_ext/array/access.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Array
   # Returns the tail of the array from +position+.
   #
diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb
index 3d00046d02..cac15e1100 100644
--- a/activesupport/lib/active_support/core_ext/array/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/array/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/xml_mini"
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/string/inflections"
diff --git a/activesupport/lib/active_support/core_ext/array/extract_options.rb b/activesupport/lib/active_support/core_ext/array/extract_options.rb
index 8204d42caf..9008a0df2a 100644
--- a/activesupport/lib/active_support/core_ext/array/extract_options.rb
+++ b/activesupport/lib/active_support/core_ext/array/extract_options.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # By default, only instances of Hash itself are extractable.
   # Subclasses of Hash may implement this method and return
diff --git a/activesupport/lib/active_support/core_ext/array/grouping.rb b/activesupport/lib/active_support/core_ext/array/grouping.rb
index 706c576691..0d798e5c4e 100644
--- a/activesupport/lib/active_support/core_ext/array/grouping.rb
+++ b/activesupport/lib/active_support/core_ext/array/grouping.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Array
   # Splits or iterates over the array in groups of size +number+,
   # padding any remaining slots with +fill_with+ unless it is +false+.
diff --git a/activesupport/lib/active_support/core_ext/array/inquiry.rb b/activesupport/lib/active_support/core_ext/array/inquiry.rb
index 81082f7128..66fa5fcd0c 100644
--- a/activesupport/lib/active_support/core_ext/array/inquiry.rb
+++ b/activesupport/lib/active_support/core_ext/array/inquiry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/array_inquirer"
 
 class Array
diff --git a/activesupport/lib/active_support/core_ext/array/prepend_and_append.rb b/activesupport/lib/active_support/core_ext/array/prepend_and_append.rb
index 2dd1547765..88a34128c9 100644
--- a/activesupport/lib/active_support/core_ext/array/prepend_and_append.rb
+++ b/activesupport/lib/active_support/core_ext/array/prepend_and_append.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Array
   # The human way of thinking about adding stuff to the end of a list is with append.
   alias_method :append,  :push unless [].respond_to?(:append)
diff --git a/activesupport/lib/active_support/core_ext/array/wrap.rb b/activesupport/lib/active_support/core_ext/array/wrap.rb
index adb25718e4..b611d34c27 100644
--- a/activesupport/lib/active_support/core_ext/array/wrap.rb
+++ b/activesupport/lib/active_support/core_ext/array/wrap.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Array
   # Wraps its argument in an array unless it is already an array (or array-like).
   #
diff --git a/activesupport/lib/active_support/core_ext/benchmark.rb b/activesupport/lib/active_support/core_ext/benchmark.rb
index 2db6e5f1c5..2300953860 100644
--- a/activesupport/lib/active_support/core_ext/benchmark.rb
+++ b/activesupport/lib/active_support/core_ext/benchmark.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "benchmark"
 
 class << Benchmark
diff --git a/activesupport/lib/active_support/core_ext/big_decimal.rb b/activesupport/lib/active_support/core_ext/big_decimal.rb
index b02bae8804..7b4f87f10e 100644
--- a/activesupport/lib/active_support/core_ext/big_decimal.rb
+++ b/activesupport/lib/active_support/core_ext/big_decimal.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 require "active_support/core_ext/big_decimal/conversions"
diff --git a/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
index 1729f00530..decd4e1699 100644
--- a/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "bigdecimal"
 require "bigdecimal/util"
 
diff --git a/activesupport/lib/active_support/core_ext/class.rb b/activesupport/lib/active_support/core_ext/class.rb
index 059f0a9097..6a19e862d0 100644
--- a/activesupport/lib/active_support/core_ext/class.rb
+++ b/activesupport/lib/active_support/core_ext/class.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "active_support/core_ext/class/attribute"
 require "active_support/core_ext/class/subclasses"
diff --git a/activesupport/lib/active_support/core_ext/class/attribute.rb b/activesupport/lib/active_support/core_ext/class/attribute.rb
index 2fd4b18d3f..8caddcd5c3 100644
--- a/activesupport/lib/active_support/core_ext/class/attribute.rb
+++ b/activesupport/lib/active_support/core_ext/class/attribute.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/singleton_class"
 require "active_support/core_ext/module/remove_method"
 require "active_support/core_ext/array/extract_options"
diff --git a/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
index fb92c5d3d1..0f767925ed 100644
--- a/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
+++ b/activesupport/lib/active_support/core_ext/class/attribute_accessors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # cattr_* became mattr_* aliases in 7dfbd91b0780fbd6a1dd9bfbc176e10894871d2d,
 # but we keep this around for libraries that directly require it knowing they
 # want cattr_*. No need to deprecate.
diff --git a/activesupport/lib/active_support/core_ext/class/subclasses.rb b/activesupport/lib/active_support/core_ext/class/subclasses.rb
index f92ccdbf88..62397d9508 100644
--- a/activesupport/lib/active_support/core_ext/class/subclasses.rb
+++ b/activesupport/lib/active_support/core_ext/class/subclasses.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/anonymous"
 require "active_support/core_ext/module/reachable"
 
diff --git a/activesupport/lib/active_support/core_ext/date.rb b/activesupport/lib/active_support/core_ext/date.rb
index 1598be9ba6..4f66804da2 100644
--- a/activesupport/lib/active_support/core_ext/date.rb
+++ b/activesupport/lib/active_support/core_ext/date.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/date/acts_like"
 require "active_support/core_ext/date/blank"
 require "active_support/core_ext/date/calculations"
diff --git a/activesupport/lib/active_support/core_ext/date/acts_like.rb b/activesupport/lib/active_support/core_ext/date/acts_like.rb
index 6c125d279c..46fe99ad47 100644
--- a/activesupport/lib/active_support/core_ext/date/acts_like.rb
+++ b/activesupport/lib/active_support/core_ext/date/acts_like.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/acts_like"
 
 class Date
diff --git a/activesupport/lib/active_support/core_ext/date/blank.rb b/activesupport/lib/active_support/core_ext/date/blank.rb
index a28e726902..edd2847126 100644
--- a/activesupport/lib/active_support/core_ext/date/blank.rb
+++ b/activesupport/lib/active_support/core_ext/date/blank.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 
 class Date #:nodoc:
diff --git a/activesupport/lib/active_support/core_ext/date/calculations.rb b/activesupport/lib/active_support/core_ext/date/calculations.rb
index c0f4fdae80..d6f60cac04 100644
--- a/activesupport/lib/active_support/core_ext/date/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date/calculations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/duration"
 require "active_support/core_ext/object/acts_like"
diff --git a/activesupport/lib/active_support/core_ext/date/conversions.rb b/activesupport/lib/active_support/core_ext/date/conversions.rb
index a36d5d844d..0f59c754fe 100644
--- a/activesupport/lib/active_support/core_ext/date/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/date/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/inflector/methods"
 require "active_support/core_ext/date/zones"
diff --git a/activesupport/lib/active_support/core_ext/date/zones.rb b/activesupport/lib/active_support/core_ext/date/zones.rb
index 6aa0852e07..da23fe4892 100644
--- a/activesupport/lib/active_support/core_ext/date/zones.rb
+++ b/activesupport/lib/active_support/core_ext/date/zones.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/core_ext/date_and_time/zones"
 
diff --git a/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb b/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
index 1fa629e017..e2e1d3e359 100644
--- a/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date_and_time/calculations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/try"
 
 module DateAndTime
diff --git a/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb b/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
index 078ac88229..2d45e16546 100644
--- a/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
+++ b/activesupport/lib/active_support/core_ext/date_and_time/compatibility.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module DateAndTime
diff --git a/activesupport/lib/active_support/core_ext/date_and_time/zones.rb b/activesupport/lib/active_support/core_ext/date_and_time/zones.rb
index 4cc94d4ece..edd724f1d0 100644
--- a/activesupport/lib/active_support/core_ext/date_and_time/zones.rb
+++ b/activesupport/lib/active_support/core_ext/date_and_time/zones.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module DateAndTime
   module Zones
     # Returns the simultaneous time in <tt>Time.zone</tt> if a zone is given or
diff --git a/activesupport/lib/active_support/core_ext/date_time.rb b/activesupport/lib/active_support/core_ext/date_time.rb
index 5f238079c0..6fd498f864 100644
--- a/activesupport/lib/active_support/core_ext/date_time.rb
+++ b/activesupport/lib/active_support/core_ext/date_time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/date_time/acts_like"
 require "active_support/core_ext/date_time/blank"
 require "active_support/core_ext/date_time/calculations"
diff --git a/activesupport/lib/active_support/core_ext/date_time/acts_like.rb b/activesupport/lib/active_support/core_ext/date_time/acts_like.rb
index 774ff692c4..6f50f55a53 100644
--- a/activesupport/lib/active_support/core_ext/date_time/acts_like.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/acts_like.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/core_ext/object/acts_like"
 
diff --git a/activesupport/lib/active_support/core_ext/date_time/blank.rb b/activesupport/lib/active_support/core_ext/date_time/blank.rb
index 874c7554a3..b475fd926d 100644
--- a/activesupport/lib/active_support/core_ext/date_time/blank.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/blank.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 
 class DateTime #:nodoc:
diff --git a/activesupport/lib/active_support/core_ext/date_time/calculations.rb b/activesupport/lib/active_support/core_ext/date_time/calculations.rb
index 91289175ed..7a9eb8c266 100644
--- a/activesupport/lib/active_support/core_ext/date_time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/calculations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 
 class DateTime
diff --git a/activesupport/lib/active_support/core_ext/date_time/compatibility.rb b/activesupport/lib/active_support/core_ext/date_time/compatibility.rb
index fd97fbce98..870391aeaa 100644
--- a/activesupport/lib/active_support/core_ext/date_time/compatibility.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/compatibility.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/date_and_time/compatibility"
 require "active_support/core_ext/module/remove_method"
 
diff --git a/activesupport/lib/active_support/core_ext/date_time/conversions.rb b/activesupport/lib/active_support/core_ext/date_time/conversions.rb
index 5c515bebbf..d9b3743858 100644
--- a/activesupport/lib/active_support/core_ext/date_time/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/date_time/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/inflector/methods"
 require "active_support/core_ext/time/conversions"
diff --git a/activesupport/lib/active_support/core_ext/digest/uuid.rb b/activesupport/lib/active_support/core_ext/digest/uuid.rb
index 26a300feb6..e6d60e3267 100644
--- a/activesupport/lib/active_support/core_ext/digest/uuid.rb
+++ b/activesupport/lib/active_support/core_ext/digest/uuid.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 
 module Digest
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb
index a744b78e1c..3a4ae6cb8b 100644
--- a/activesupport/lib/active_support/core_ext/enumerable.rb
+++ b/activesupport/lib/active_support/core_ext/enumerable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Enumerable
   # Enumerable#sum was added in Ruby 2.4, but it only works with Numeric elements
   # when we omit an identity.
diff --git a/activesupport/lib/active_support/core_ext/file.rb b/activesupport/lib/active_support/core_ext/file.rb
index a1272c02e2..6d99bad2af 100644
--- a/activesupport/lib/active_support/core_ext/file.rb
+++ b/activesupport/lib/active_support/core_ext/file.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 require "active_support/core_ext/file/atomic"
diff --git a/activesupport/lib/active_support/core_ext/file/atomic.rb b/activesupport/lib/active_support/core_ext/file/atomic.rb
index 5b30e93357..8d6c0d3685 100644
--- a/activesupport/lib/active_support/core_ext/file/atomic.rb
+++ b/activesupport/lib/active_support/core_ext/file/atomic.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 
 class File
diff --git a/activesupport/lib/active_support/core_ext/hash.rb b/activesupport/lib/active_support/core_ext/hash.rb
index 5d9fe68bb6..c819307e8a 100644
--- a/activesupport/lib/active_support/core_ext/hash.rb
+++ b/activesupport/lib/active_support/core_ext/hash.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/compact"
 require "active_support/core_ext/hash/conversions"
 require "active_support/core_ext/hash/deep_merge"
diff --git a/activesupport/lib/active_support/core_ext/hash/compact.rb b/activesupport/lib/active_support/core_ext/hash/compact.rb
index ddccbe7d16..e357284be0 100644
--- a/activesupport/lib/active_support/core_ext/hash/compact.rb
+++ b/activesupport/lib/active_support/core_ext/hash/compact.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   unless Hash.instance_methods(false).include?(:compact)
     # Returns a hash with non +nil+ values.
diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index f33a52ae2b..2a58a7f1ca 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/xml_mini"
 require "active_support/time"
 require "active_support/core_ext/object/blank"
diff --git a/activesupport/lib/active_support/core_ext/hash/deep_merge.rb b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb
index 1c6627a597..9c9faf67ea 100644
--- a/activesupport/lib/active_support/core_ext/hash/deep_merge.rb
+++ b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Returns a new hash with +self+ and +other_hash+ merged recursively.
   #
diff --git a/activesupport/lib/active_support/core_ext/hash/except.rb b/activesupport/lib/active_support/core_ext/hash/except.rb
index e31c7c61e4..2f6d38c1f6 100644
--- a/activesupport/lib/active_support/core_ext/hash/except.rb
+++ b/activesupport/lib/active_support/core_ext/hash/except.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Returns a hash that includes everything except given keys.
   #   hash = { a: true, b: false, c: nil }
diff --git a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
index 74e606dcc7..3e1ccecb6c 100644
--- a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
+++ b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/hash_with_indifferent_access"
 
 class Hash
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb
index b38ea9ba50..b7089357a8 100644
--- a/activesupport/lib/active_support/core_ext/hash/keys.rb
+++ b/activesupport/lib/active_support/core_ext/hash/keys.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Returns a new hash with all keys converted using the +block+ operation.
   #
diff --git a/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb b/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
index 2055d06385..061c959442 100644
--- a/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
+++ b/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Merges the caller into +other_hash+. For example,
   #
diff --git a/activesupport/lib/active_support/core_ext/hash/slice.rb b/activesupport/lib/active_support/core_ext/hash/slice.rb
index bd370931e4..161b00dfb3 100644
--- a/activesupport/lib/active_support/core_ext/hash/slice.rb
+++ b/activesupport/lib/active_support/core_ext/hash/slice.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Slices a hash to include only the given keys. Returns a hash containing
   # the given keys.
diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb
index b6e2734193..2f693bff0c 100644
--- a/activesupport/lib/active_support/core_ext/hash/transform_values.rb
+++ b/activesupport/lib/active_support/core_ext/hash/transform_values.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Hash
   # Returns a new hash with the results of running +block+ once for every value.
   # The keys are unchanged.
diff --git a/activesupport/lib/active_support/core_ext/integer.rb b/activesupport/lib/active_support/core_ext/integer.rb
index 21c6d9e0cc..8f0c55f9d3 100644
--- a/activesupport/lib/active_support/core_ext/integer.rb
+++ b/activesupport/lib/active_support/core_ext/integer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/integer/multiple"
 require "active_support/core_ext/integer/inflections"
 require "active_support/core_ext/integer/time"
diff --git a/activesupport/lib/active_support/core_ext/integer/inflections.rb b/activesupport/lib/active_support/core_ext/integer/inflections.rb
index 945817793d..bc21b65533 100644
--- a/activesupport/lib/active_support/core_ext/integer/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/integer/inflections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector"
 
 class Integer
diff --git a/activesupport/lib/active_support/core_ext/integer/multiple.rb b/activesupport/lib/active_support/core_ext/integer/multiple.rb
index 2e4d78e66c..c668c7c2eb 100644
--- a/activesupport/lib/active_support/core_ext/integer/multiple.rb
+++ b/activesupport/lib/active_support/core_ext/integer/multiple.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Integer
   # Check whether the integer is evenly divisible by the argument.
   #
diff --git a/activesupport/lib/active_support/core_ext/integer/time.rb b/activesupport/lib/active_support/core_ext/integer/time.rb
index be0958a495..74baae3639 100644
--- a/activesupport/lib/active_support/core_ext/integer/time.rb
+++ b/activesupport/lib/active_support/core_ext/integer/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/duration"
 require "active_support/core_ext/numeric/time"
 
diff --git a/activesupport/lib/active_support/core_ext/kernel.rb b/activesupport/lib/active_support/core_ext/kernel.rb
index 9e75d29cab..3d41ff7876 100644
--- a/activesupport/lib/active_support/core_ext/kernel.rb
+++ b/activesupport/lib/active_support/core_ext/kernel.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/agnostics"
 require "active_support/core_ext/kernel/concern"
 require "active_support/core_ext/kernel/reporting"
diff --git a/activesupport/lib/active_support/core_ext/kernel/agnostics.rb b/activesupport/lib/active_support/core_ext/kernel/agnostics.rb
index 84a48979c4..64837d87aa 100644
--- a/activesupport/lib/active_support/core_ext/kernel/agnostics.rb
+++ b/activesupport/lib/active_support/core_ext/kernel/agnostics.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Object
   # Makes backticks behave (somewhat more) similarly on all platforms.
   # On win32 `nonexistent_command` raises Errno::ENOENT; on Unix, the
diff --git a/activesupport/lib/active_support/core_ext/kernel/concern.rb b/activesupport/lib/active_support/core_ext/kernel/concern.rb
index 9d170e0a64..307a7f7a63 100644
--- a/activesupport/lib/active_support/core_ext/kernel/concern.rb
+++ b/activesupport/lib/active_support/core_ext/kernel/concern.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/concerning"
 
 module Kernel
diff --git a/activesupport/lib/active_support/core_ext/kernel/reporting.rb b/activesupport/lib/active_support/core_ext/kernel/reporting.rb
index 822efb5aae..c02618d5f3 100644
--- a/activesupport/lib/active_support/core_ext/kernel/reporting.rb
+++ b/activesupport/lib/active_support/core_ext/kernel/reporting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Kernel
   module_function
 
diff --git a/activesupport/lib/active_support/core_ext/kernel/singleton_class.rb b/activesupport/lib/active_support/core_ext/kernel/singleton_class.rb
index 5f9c008f6e..9bbf1bbd73 100644
--- a/activesupport/lib/active_support/core_ext/kernel/singleton_class.rb
+++ b/activesupport/lib/active_support/core_ext/kernel/singleton_class.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Kernel
   # class_eval on an object acts like singleton_class.class_eval.
   def class_eval(*args, &block)
diff --git a/activesupport/lib/active_support/core_ext/load_error.rb b/activesupport/lib/active_support/core_ext/load_error.rb
index 55177efdaf..d273487010 100644
--- a/activesupport/lib/active_support/core_ext/load_error.rb
+++ b/activesupport/lib/active_support/core_ext/load_error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class LoadError
   REGEXPS = [
     /^no such file to load -- (.+)$/i,
diff --git a/activesupport/lib/active_support/core_ext/marshal.rb b/activesupport/lib/active_support/core_ext/marshal.rb
index 13b1d0cf95..bba2b3be2e 100644
--- a/activesupport/lib/active_support/core_ext/marshal.rb
+++ b/activesupport/lib/active_support/core_ext/marshal.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module MarshalWithAutoloading # :nodoc:
     def load(source, proc = nil)
diff --git a/activesupport/lib/active_support/core_ext/module.rb b/activesupport/lib/active_support/core_ext/module.rb
index 6fe85c30a6..2930255557 100644
--- a/activesupport/lib/active_support/core_ext/module.rb
+++ b/activesupport/lib/active_support/core_ext/module.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/aliasing"
 require "active_support/core_ext/module/introspection"
 require "active_support/core_ext/module/anonymous"
diff --git a/activesupport/lib/active_support/core_ext/module/aliasing.rb b/activesupport/lib/active_support/core_ext/module/aliasing.rb
index 62eb9e4c76..c48bd3354a 100644
--- a/activesupport/lib/active_support/core_ext/module/aliasing.rb
+++ b/activesupport/lib/active_support/core_ext/module/aliasing.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Module
   # Allows you to make aliases for attributes, which includes
   # getter, setter, and a predicate.
diff --git a/activesupport/lib/active_support/core_ext/module/anonymous.rb b/activesupport/lib/active_support/core_ext/module/anonymous.rb
index 7d10240199..510c9a5430 100644
--- a/activesupport/lib/active_support/core_ext/module/anonymous.rb
+++ b/activesupport/lib/active_support/core_ext/module/anonymous.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Module
   # A module may or may not have a name.
   #
diff --git a/activesupport/lib/active_support/core_ext/module/attr_internal.rb b/activesupport/lib/active_support/core_ext/module/attr_internal.rb
index 8d37460dbc..5081d5f7a3 100644
--- a/activesupport/lib/active_support/core_ext/module/attr_internal.rb
+++ b/activesupport/lib/active_support/core_ext/module/attr_internal.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Module
   # Declares an attribute reader backed by an internally-named instance variable.
   def attr_internal_reader(*attrs)
diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
index 9276755374..9244cfa157 100644
--- a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
+++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb
index 348563b1f7..1e82b4acc2 100644
--- a/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb
+++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/core_ext/module/concerning.rb b/activesupport/lib/active_support/core_ext/module/concerning.rb
index bc22e3169b..97b0a382ce 100644
--- a/activesupport/lib/active_support/core_ext/module/concerning.rb
+++ b/activesupport/lib/active_support/core_ext/module/concerning.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 
 class Module
diff --git a/activesupport/lib/active_support/core_ext/module/delegation.rb b/activesupport/lib/active_support/core_ext/module/delegation.rb
index ccc33609b7..13f3894e6c 100644
--- a/activesupport/lib/active_support/core_ext/module/delegation.rb
+++ b/activesupport/lib/active_support/core_ext/module/delegation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/core_ext/module/deprecation.rb b/activesupport/lib/active_support/core_ext/module/deprecation.rb
index 98dfaad760..f3f2e7f5fc 100644
--- a/activesupport/lib/active_support/core_ext/module/deprecation.rb
+++ b/activesupport/lib/active_support/core_ext/module/deprecation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Module
   #   deprecate :foo
   #   deprecate bar: 'message'
diff --git a/activesupport/lib/active_support/core_ext/module/introspection.rb b/activesupport/lib/active_support/core_ext/module/introspection.rb
index 1e1c3870f5..ca20a6d4c5 100644
--- a/activesupport/lib/active_support/core_ext/module/introspection.rb
+++ b/activesupport/lib/active_support/core_ext/module/introspection.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector"
 
 class Module
diff --git a/activesupport/lib/active_support/core_ext/module/reachable.rb b/activesupport/lib/active_support/core_ext/module/reachable.rb
index 8cb09dd259..b89a38f26c 100644
--- a/activesupport/lib/active_support/core_ext/module/reachable.rb
+++ b/activesupport/lib/active_support/core_ext/module/reachable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/anonymous"
 require "active_support/core_ext/string/inflections"
 
diff --git a/activesupport/lib/active_support/core_ext/module/remove_method.rb b/activesupport/lib/active_support/core_ext/module/remove_method.rb
index c17808b244..d5ec16d68a 100644
--- a/activesupport/lib/active_support/core_ext/module/remove_method.rb
+++ b/activesupport/lib/active_support/core_ext/module/remove_method.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Module
   # Removes the named method, if it exists.
   def remove_possible_method(method)
diff --git a/activesupport/lib/active_support/core_ext/name_error.rb b/activesupport/lib/active_support/core_ext/name_error.rb
index 1bcb6ded3c..6b447d772b 100644
--- a/activesupport/lib/active_support/core_ext/name_error.rb
+++ b/activesupport/lib/active_support/core_ext/name_error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class NameError
   # Extract the name of the missing constant from the exception message.
   #
diff --git a/activesupport/lib/active_support/core_ext/numeric.rb b/activesupport/lib/active_support/core_ext/numeric.rb
index 402e9d4323..6062f9e3a8 100644
--- a/activesupport/lib/active_support/core_ext/numeric.rb
+++ b/activesupport/lib/active_support/core_ext/numeric.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/numeric/bytes"
 require "active_support/core_ext/numeric/time"
 require "active_support/core_ext/numeric/inquiry"
diff --git a/activesupport/lib/active_support/core_ext/numeric/bytes.rb b/activesupport/lib/active_support/core_ext/numeric/bytes.rb
index 23e1e39dd8..dfbca32474 100644
--- a/activesupport/lib/active_support/core_ext/numeric/bytes.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/bytes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Numeric
   KILOBYTE = 1024
   MEGABYTE = KILOBYTE * 1024
diff --git a/activesupport/lib/active_support/core_ext/numeric/conversions.rb b/activesupport/lib/active_support/core_ext/numeric/conversions.rb
index bedfe5ce32..4f6621693e 100644
--- a/activesupport/lib/active_support/core_ext/numeric/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/big_decimal/conversions"
 require "active_support/number_helper"
 require "active_support/core_ext/module/deprecation"
diff --git a/activesupport/lib/active_support/core_ext/numeric/inquiry.rb b/activesupport/lib/active_support/core_ext/numeric/inquiry.rb
index baccf87848..ec79701189 100644
--- a/activesupport/lib/active_support/core_ext/numeric/inquiry.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/inquiry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 unless 1.respond_to?(:positive?) # TODO: Remove this file when we drop support to ruby < 2.3
   class Numeric
     # Returns true if the number is positive.
diff --git a/activesupport/lib/active_support/core_ext/numeric/time.rb b/activesupport/lib/active_support/core_ext/numeric/time.rb
index 95f73fb336..2e6c70d418 100644
--- a/activesupport/lib/active_support/core_ext/numeric/time.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/duration"
 require "active_support/core_ext/time/calculations"
 require "active_support/core_ext/time/acts_like"
diff --git a/activesupport/lib/active_support/core_ext/object.rb b/activesupport/lib/active_support/core_ext/object.rb
index f3cd8b0898..58bbf78601 100644
--- a/activesupport/lib/active_support/core_ext/object.rb
+++ b/activesupport/lib/active_support/core_ext/object.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/acts_like"
 require "active_support/core_ext/object/blank"
 require "active_support/core_ext/object/duplicable"
diff --git a/activesupport/lib/active_support/core_ext/object/acts_like.rb b/activesupport/lib/active_support/core_ext/object/acts_like.rb
index b856e1ba16..3912cc5ace 100644
--- a/activesupport/lib/active_support/core_ext/object/acts_like.rb
+++ b/activesupport/lib/active_support/core_ext/object/acts_like.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Object
   # A duck-type assistant method. For example, Active Support extends Date
   # to define an <tt>acts_like_date?</tt> method, and extends Time to define
diff --git a/activesupport/lib/active_support/core_ext/object/blank.rb b/activesupport/lib/active_support/core_ext/object/blank.rb
index 3ad4605235..bdb50ee291 100644
--- a/activesupport/lib/active_support/core_ext/object/blank.rb
+++ b/activesupport/lib/active_support/core_ext/object/blank.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/regexp"
 
 class Object
diff --git a/activesupport/lib/active_support/core_ext/object/conversions.rb b/activesupport/lib/active_support/core_ext/object/conversions.rb
index 2626d9ed29..918ebcdc9f 100644
--- a/activesupport/lib/active_support/core_ext/object/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/object/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/to_param"
 require "active_support/core_ext/object/to_query"
 require "active_support/core_ext/array/conversions"
diff --git a/activesupport/lib/active_support/core_ext/object/deep_dup.rb b/activesupport/lib/active_support/core_ext/object/deep_dup.rb
index ce1f765448..5ac649e552 100644
--- a/activesupport/lib/active_support/core_ext/object/deep_dup.rb
+++ b/activesupport/lib/active_support/core_ext/object/deep_dup.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/duplicable"
 
 class Object
diff --git a/activesupport/lib/active_support/core_ext/object/duplicable.rb b/activesupport/lib/active_support/core_ext/object/duplicable.rb
index 0838b1fb70..b028df97ee 100644
--- a/activesupport/lib/active_support/core_ext/object/duplicable.rb
+++ b/activesupport/lib/active_support/core_ext/object/duplicable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #--
 # Most objects are cloneable, but not all. For example you can't dup methods:
 #
diff --git a/activesupport/lib/active_support/core_ext/object/inclusion.rb b/activesupport/lib/active_support/core_ext/object/inclusion.rb
index 525ddcb575..98bf820d36 100644
--- a/activesupport/lib/active_support/core_ext/object/inclusion.rb
+++ b/activesupport/lib/active_support/core_ext/object/inclusion.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Object
   # Returns true if this object is included in the argument. Argument must be
   # any object which responds to +#include?+. Usage:
diff --git a/activesupport/lib/active_support/core_ext/object/instance_variables.rb b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
index 0a06125210..593a7a4940 100644
--- a/activesupport/lib/active_support/core_ext/object/instance_variables.rb
+++ b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Object
   # Returns a hash with string keys that maps instance variable names without "@" to their
   # corresponding values.
diff --git a/activesupport/lib/active_support/core_ext/object/json.rb b/activesupport/lib/active_support/core_ext/object/json.rb
index 87e5cdce0d..1c4d181443 100644
--- a/activesupport/lib/active_support/core_ext/object/json.rb
+++ b/activesupport/lib/active_support/core_ext/object/json.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Hack to load json gem first so we can overwrite its to_json.
 require "json"
 require "bigdecimal"
diff --git a/activesupport/lib/active_support/core_ext/object/to_param.rb b/activesupport/lib/active_support/core_ext/object/to_param.rb
index 58e60b5d4e..5eeaf03163 100644
--- a/activesupport/lib/active_support/core_ext/object/to_param.rb
+++ b/activesupport/lib/active_support/core_ext/object/to_param.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/to_query"
diff --git a/activesupport/lib/active_support/core_ext/object/to_query.rb b/activesupport/lib/active_support/core_ext/object/to_query.rb
index f85e0eaa6f..a3a3abacbb 100644
--- a/activesupport/lib/active_support/core_ext/object/to_query.rb
+++ b/activesupport/lib/active_support/core_ext/object/to_query.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cgi"
 
 class Object
diff --git a/activesupport/lib/active_support/core_ext/object/try.rb b/activesupport/lib/active_support/core_ext/object/try.rb
index 952fba4541..b2be619b2d 100644
--- a/activesupport/lib/active_support/core_ext/object/try.rb
+++ b/activesupport/lib/active_support/core_ext/object/try.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "delegate"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/core_ext/object/with_options.rb b/activesupport/lib/active_support/core_ext/object/with_options.rb
index bc3075b5f1..3a44e08630 100644
--- a/activesupport/lib/active_support/core_ext/object/with_options.rb
+++ b/activesupport/lib/active_support/core_ext/object/with_options.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/option_merger"
 
 class Object
diff --git a/activesupport/lib/active_support/core_ext/range.rb b/activesupport/lib/active_support/core_ext/range.rb
index 9d84cbcec2..3190e3ff76 100644
--- a/activesupport/lib/active_support/core_ext/range.rb
+++ b/activesupport/lib/active_support/core_ext/range.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/range/conversions"
 require "active_support/core_ext/range/include_range"
 require "active_support/core_ext/range/overlaps"
diff --git a/activesupport/lib/active_support/core_ext/range/conversions.rb b/activesupport/lib/active_support/core_ext/range/conversions.rb
index 5038a15cdf..69ea046cb6 100644
--- a/activesupport/lib/active_support/core_ext/range/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/range/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport::RangeWithFormat
   RANGE_FORMATS = {
     db: Proc.new { |start, stop| "BETWEEN '#{start.to_s(:db)}' AND '#{stop.to_s(:db)}'" }
diff --git a/activesupport/lib/active_support/core_ext/range/each.rb b/activesupport/lib/active_support/core_ext/range/each.rb
index aeea8c867b..dc6dad5ced 100644
--- a/activesupport/lib/active_support/core_ext/range/each.rb
+++ b/activesupport/lib/active_support/core_ext/range/each.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module EachTimeWithZone #:nodoc:
     def each(&block)
diff --git a/activesupport/lib/active_support/core_ext/range/include_range.rb b/activesupport/lib/active_support/core_ext/range/include_range.rb
index d307750a23..c69e1e3fb9 100644
--- a/activesupport/lib/active_support/core_ext/range/include_range.rb
+++ b/activesupport/lib/active_support/core_ext/range/include_range.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module IncludeWithRange #:nodoc:
     # Extends the default Range#include? to support range comparisons.
diff --git a/activesupport/lib/active_support/core_ext/range/overlaps.rb b/activesupport/lib/active_support/core_ext/range/overlaps.rb
index ecdfbd803b..603657c180 100644
--- a/activesupport/lib/active_support/core_ext/range/overlaps.rb
+++ b/activesupport/lib/active_support/core_ext/range/overlaps.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Range
   # Compare two ranges and see if they overlap each other
   #  (1..5).overlaps?(4..6) # => true
diff --git a/activesupport/lib/active_support/core_ext/regexp.rb b/activesupport/lib/active_support/core_ext/regexp.rb
index 23b337ba67..d77d01bf42 100644
--- a/activesupport/lib/active_support/core_ext/regexp.rb
+++ b/activesupport/lib/active_support/core_ext/regexp.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Regexp #:nodoc:
   def multiline?
     options & MULTILINE == MULTILINE
diff --git a/activesupport/lib/active_support/core_ext/securerandom.rb b/activesupport/lib/active_support/core_ext/securerandom.rb
index 033ac356bd..a57685bea1 100644
--- a/activesupport/lib/active_support/core_ext/securerandom.rb
+++ b/activesupport/lib/active_support/core_ext/securerandom.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 
 module SecureRandom
diff --git a/activesupport/lib/active_support/core_ext/string.rb b/activesupport/lib/active_support/core_ext/string.rb
index cfac17f810..4cb3200875 100644
--- a/activesupport/lib/active_support/core_ext/string.rb
+++ b/activesupport/lib/active_support/core_ext/string.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/conversions"
 require "active_support/core_ext/string/filters"
 require "active_support/core_ext/string/multibyte"
diff --git a/activesupport/lib/active_support/core_ext/string/access.rb b/activesupport/lib/active_support/core_ext/string/access.rb
index 11f4bf8052..6133826f37 100644
--- a/activesupport/lib/active_support/core_ext/string/access.rb
+++ b/activesupport/lib/active_support/core_ext/string/access.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # If you pass a single integer, returns a substring of one character at that
   # position. The first character of the string is at position 0, the next at
diff --git a/activesupport/lib/active_support/core_ext/string/behavior.rb b/activesupport/lib/active_support/core_ext/string/behavior.rb
index e63888991d..710f1f4670 100644
--- a/activesupport/lib/active_support/core_ext/string/behavior.rb
+++ b/activesupport/lib/active_support/core_ext/string/behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # Enables more predictable duck-typing on String-like classes. See <tt>Object#acts_like?</tt>.
   def acts_like_string?
diff --git a/activesupport/lib/active_support/core_ext/string/conversions.rb b/activesupport/lib/active_support/core_ext/string/conversions.rb
index 79668312c5..221b4969cc 100644
--- a/activesupport/lib/active_support/core_ext/string/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/string/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "active_support/core_ext/time/calculations"
 
diff --git a/activesupport/lib/active_support/core_ext/string/exclude.rb b/activesupport/lib/active_support/core_ext/string/exclude.rb
index 2893a6eeed..0ac684f6ee 100644
--- a/activesupport/lib/active_support/core_ext/string/exclude.rb
+++ b/activesupport/lib/active_support/core_ext/string/exclude.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # The inverse of <tt>String#include?</tt>. Returns true if the string
   # does not include the other string.
diff --git a/activesupport/lib/active_support/core_ext/string/filters.rb b/activesupport/lib/active_support/core_ext/string/filters.rb
index e05cf024f6..a9ec2eb842 100644
--- a/activesupport/lib/active_support/core_ext/string/filters.rb
+++ b/activesupport/lib/active_support/core_ext/string/filters.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # Returns the string, first removing all whitespace on both ends of
   # the string, and then changing remaining consecutive whitespace
diff --git a/activesupport/lib/active_support/core_ext/string/indent.rb b/activesupport/lib/active_support/core_ext/string/indent.rb
index a38198a8e6..d7b58301d3 100644
--- a/activesupport/lib/active_support/core_ext/string/indent.rb
+++ b/activesupport/lib/active_support/core_ext/string/indent.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # Same as +indent+, except it indents the receiver in-place.
   #
diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb
index 63bb52b2da..b27cfe53f4 100644
--- a/activesupport/lib/active_support/core_ext/string/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/string/inflections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 require "active_support/inflector/transliterate"
 
diff --git a/activesupport/lib/active_support/core_ext/string/inquiry.rb b/activesupport/lib/active_support/core_ext/string/inquiry.rb
index 874efc6ae3..c95d83beae 100644
--- a/activesupport/lib/active_support/core_ext/string/inquiry.rb
+++ b/activesupport/lib/active_support/core_ext/string/inquiry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/string_inquirer"
 
 class String
diff --git a/activesupport/lib/active_support/core_ext/string/multibyte.rb b/activesupport/lib/active_support/core_ext/string/multibyte.rb
index aee0bb4bf3..1c73182259 100644
--- a/activesupport/lib/active_support/core_ext/string/multibyte.rb
+++ b/activesupport/lib/active_support/core_ext/string/multibyte.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/multibyte"
 
 class String
diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index c26f1edc88..94ce3f6a61 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "erb"
 require "active_support/core_ext/kernel/singleton_class"
 require "active_support/multibyte/unicode"
diff --git a/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb b/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
index f072fbf7d7..641acf62d0 100644
--- a/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
+++ b/activesupport/lib/active_support/core_ext/string/starts_ends_with.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   alias_method :starts_with?, :start_with?
   alias_method :ends_with?, :end_with?
diff --git a/activesupport/lib/active_support/core_ext/string/strip.rb b/activesupport/lib/active_support/core_ext/string/strip.rb
index 979b6bd767..bb62e6c0ba 100644
--- a/activesupport/lib/active_support/core_ext/string/strip.rb
+++ b/activesupport/lib/active_support/core_ext/string/strip.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class String
   # Strips indentation in heredocs.
   #
diff --git a/activesupport/lib/active_support/core_ext/string/zones.rb b/activesupport/lib/active_support/core_ext/string/zones.rb
index a327bdc782..de5a28e4f7 100644
--- a/activesupport/lib/active_support/core_ext/string/zones.rb
+++ b/activesupport/lib/active_support/core_ext/string/zones.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/conversions"
 require "active_support/core_ext/time/zones"
 
diff --git a/activesupport/lib/active_support/core_ext/time.rb b/activesupport/lib/active_support/core_ext/time.rb
index 92f5cdde9f..b1ae4a45d9 100644
--- a/activesupport/lib/active_support/core_ext/time.rb
+++ b/activesupport/lib/active_support/core_ext/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/time/acts_like"
 require "active_support/core_ext/time/calculations"
 require "active_support/core_ext/time/compatibility"
diff --git a/activesupport/lib/active_support/core_ext/time/acts_like.rb b/activesupport/lib/active_support/core_ext/time/acts_like.rb
index fb81cd41af..cf4b2539c5 100644
--- a/activesupport/lib/active_support/core_ext/time/acts_like.rb
+++ b/activesupport/lib/active_support/core_ext/time/acts_like.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/acts_like"
 
 class Time
diff --git a/activesupport/lib/active_support/core_ext/time/calculations.rb b/activesupport/lib/active_support/core_ext/time/calculations.rb
index 011291f693..d3f23f4663 100644
--- a/activesupport/lib/active_support/core_ext/time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/time/calculations.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/duration"
 require "active_support/core_ext/time/conversions"
 require "active_support/time_with_zone"
diff --git a/activesupport/lib/active_support/core_ext/time/compatibility.rb b/activesupport/lib/active_support/core_ext/time/compatibility.rb
index 9acd18d012..45e86b77ce 100644
--- a/activesupport/lib/active_support/core_ext/time/compatibility.rb
+++ b/activesupport/lib/active_support/core_ext/time/compatibility.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/date_and_time/compatibility"
 require "active_support/core_ext/module/remove_method"
 
diff --git a/activesupport/lib/active_support/core_ext/time/conversions.rb b/activesupport/lib/active_support/core_ext/time/conversions.rb
index e07bc5a93a..595bda6b4f 100644
--- a/activesupport/lib/active_support/core_ext/time/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/time/conversions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 require "active_support/values/time_zone"
 
diff --git a/activesupport/lib/active_support/core_ext/time/zones.rb b/activesupport/lib/active_support/core_ext/time/zones.rb
index 93e57ae4f2..87b5ad903a 100644
--- a/activesupport/lib/active_support/core_ext/time/zones.rb
+++ b/activesupport/lib/active_support/core_ext/time/zones.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/time_with_zone"
 require "active_support/core_ext/time/acts_like"
 require "active_support/core_ext/date_and_time/zones"
diff --git a/activesupport/lib/active_support/core_ext/uri.rb b/activesupport/lib/active_support/core_ext/uri.rb
index f93dbdf2cd..342a5fcd52 100644
--- a/activesupport/lib/active_support/core_ext/uri.rb
+++ b/activesupport/lib/active_support/core_ext/uri.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "uri"
 str = "\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E" # Ni-ho-nn-go in UTF-8, means Japanese.
 parser = URI::Parser.new
diff --git a/activesupport/lib/active_support/current_attributes.rb b/activesupport/lib/active_support/current_attributes.rb
index 1857700486..872b0663c7 100644
--- a/activesupport/lib/active_support/current_attributes.rb
+++ b/activesupport/lib/active_support/current_attributes.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # Abstract super class that provides a thread-isolated attributes singleton, which resets automatically
   # before and after each request. This allows you to keep all the per-request attributes easily
diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb
index d6adb38aa0..3cd8f3d0ac 100644
--- a/activesupport/lib/active_support/dependencies.rb
+++ b/activesupport/lib/active_support/dependencies.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 require "thread"
 require "concurrent/map"
diff --git a/activesupport/lib/active_support/dependencies/autoload.rb b/activesupport/lib/active_support/dependencies/autoload.rb
index e5663c3d2b..13036d521d 100644
--- a/activesupport/lib/active_support/dependencies/autoload.rb
+++ b/activesupport/lib/active_support/dependencies/autoload.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/dependencies/interlock.rb b/activesupport/lib/active_support/dependencies/interlock.rb
index 12ecc6f7cb..e4e18439c5 100644
--- a/activesupport/lib/active_support/dependencies/interlock.rb
+++ b/activesupport/lib/active_support/dependencies/interlock.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concurrency/share_lock"
 
 module ActiveSupport #:nodoc:
diff --git a/activesupport/lib/active_support/deprecation.rb b/activesupport/lib/active_support/deprecation.rb
index 49a9696955..d1e6502669 100644
--- a/activesupport/lib/active_support/deprecation.rb
+++ b/activesupport/lib/active_support/deprecation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "singleton"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/deprecation/behaviors.rb b/activesupport/lib/active_support/deprecation/behaviors.rb
index 32e8cc9f0f..a9a182f212 100644
--- a/activesupport/lib/active_support/deprecation/behaviors.rb
+++ b/activesupport/lib/active_support/deprecation/behaviors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/notifications"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/deprecation/constant_accessor.rb b/activesupport/lib/active_support/deprecation/constant_accessor.rb
index bbf3b67046..2b19de365f 100644
--- a/activesupport/lib/active_support/deprecation/constant_accessor.rb
+++ b/activesupport/lib/active_support/deprecation/constant_accessor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/deprecation/instance_delegator.rb b/activesupport/lib/active_support/deprecation/instance_delegator.rb
index 1e5314b6f4..6d390f3b37 100644
--- a/activesupport/lib/active_support/deprecation/instance_delegator.rb
+++ b/activesupport/lib/active_support/deprecation/instance_delegator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/singleton_class"
 require "active_support/core_ext/module/delegation"
 
diff --git a/activesupport/lib/active_support/deprecation/method_wrappers.rb b/activesupport/lib/active_support/deprecation/method_wrappers.rb
index 1aa6f8c12b..930d71e8d2 100644
--- a/activesupport/lib/active_support/deprecation/method_wrappers.rb
+++ b/activesupport/lib/active_support/deprecation/method_wrappers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/aliasing"
 require "active_support/core_ext/array/extract_options"
 
diff --git a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
index 151c5c44ac..ce39e9a232 100644
--- a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
+++ b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/methods"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/deprecation/reporting.rb b/activesupport/lib/active_support/deprecation/reporting.rb
index f190e47b64..140bdccbb3 100644
--- a/activesupport/lib/active_support/deprecation/reporting.rb
+++ b/activesupport/lib/active_support/deprecation/reporting.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rbconfig"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/descendants_tracker.rb b/activesupport/lib/active_support/descendants_tracker.rb
index 4f759f2f26..27861e01d0 100644
--- a/activesupport/lib/active_support/descendants_tracker.rb
+++ b/activesupport/lib/active_support/descendants_tracker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # This module provides an internal implementation to track descendants
   # which is faster than iterating through ObjectSpace.
diff --git a/activesupport/lib/active_support/duration.rb b/activesupport/lib/active_support/duration.rb
index 16f16c6db0..39deb2313f 100644
--- a/activesupport/lib/active_support/duration.rb
+++ b/activesupport/lib/active_support/duration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/array/conversions"
 require "active_support/core_ext/module/delegation"
 require "active_support/core_ext/object/acts_like"
diff --git a/activesupport/lib/active_support/duration/iso8601_parser.rb b/activesupport/lib/active_support/duration/iso8601_parser.rb
index f07a7817f9..e96cb8e883 100644
--- a/activesupport/lib/active_support/duration/iso8601_parser.rb
+++ b/activesupport/lib/active_support/duration/iso8601_parser.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "strscan"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/duration/iso8601_serializer.rb b/activesupport/lib/active_support/duration/iso8601_serializer.rb
index 71504fc6cc..1cc731df2b 100644
--- a/activesupport/lib/active_support/duration/iso8601_serializer.rb
+++ b/activesupport/lib/active_support/duration/iso8601_serializer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/blank"
 require "active_support/core_ext/hash/transform_values"
 
diff --git a/activesupport/lib/active_support/evented_file_update_checker.rb b/activesupport/lib/active_support/evented_file_update_checker.rb
index 3c456beac6..f59f5d17dc 100644
--- a/activesupport/lib/active_support/evented_file_update_checker.rb
+++ b/activesupport/lib/active_support/evented_file_update_checker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 require "pathname"
 require "concurrent/atomic/atomic_boolean"
diff --git a/activesupport/lib/active_support/execution_wrapper.rb b/activesupport/lib/active_support/execution_wrapper.rb
index f78a25fd36..ca88e7876b 100644
--- a/activesupport/lib/active_support/execution_wrapper.rb
+++ b/activesupport/lib/active_support/execution_wrapper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/callbacks"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/executor.rb b/activesupport/lib/active_support/executor.rb
index caf59e91aa..a6400cae0a 100644
--- a/activesupport/lib/active_support/executor.rb
+++ b/activesupport/lib/active_support/executor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/execution_wrapper"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/file_update_checker.rb b/activesupport/lib/active_support/file_update_checker.rb
index 6565696a84..2b5e3c1350 100644
--- a/activesupport/lib/active_support/file_update_checker.rb
+++ b/activesupport/lib/active_support/file_update_checker.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/time/calculations"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/gem_version.rb b/activesupport/lib/active_support/gem_version.rb
index d6015b0161..371a39a5e6 100644
--- a/activesupport/lib/active_support/gem_version.rb
+++ b/activesupport/lib/active_support/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # Returns the version of the currently loaded Active Support as a <tt>Gem::Version</tt>.
   def self.gem_version
diff --git a/activesupport/lib/active_support/gzip.rb b/activesupport/lib/active_support/gzip.rb
index fd9263500c..95a86889ec 100644
--- a/activesupport/lib/active_support/gzip.rb
+++ b/activesupport/lib/active_support/gzip.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "zlib"
 require "stringio"
 
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index c5646656a9..3b185dd86b 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/hash/reverse_merge"
 
diff --git a/activesupport/lib/active_support/i18n.rb b/activesupport/lib/active_support/i18n.rb
index 6732381eca..1a1f1a1257 100644
--- a/activesupport/lib/active_support/i18n.rb
+++ b/activesupport/lib/active_support/i18n.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/deep_merge"
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/hash/slice"
diff --git a/activesupport/lib/active_support/i18n_railtie.rb b/activesupport/lib/active_support/i18n_railtie.rb
index 6ae702518c..51fe6f3418 100644
--- a/activesupport/lib/active_support/i18n_railtie.rb
+++ b/activesupport/lib/active_support/i18n_railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "active_support/file_update_checker"
 require "active_support/core_ext/array/wrap"
diff --git a/activesupport/lib/active_support/inflections.rb b/activesupport/lib/active_support/inflections.rb
index 29a829bec4..afa7d1f325 100644
--- a/activesupport/lib/active_support/inflections.rb
+++ b/activesupport/lib/active_support/inflections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflector/inflections"
 
 #--
diff --git a/activesupport/lib/active_support/inflector.rb b/activesupport/lib/active_support/inflector.rb
index cae91dc5e3..48631b16a8 100644
--- a/activesupport/lib/active_support/inflector.rb
+++ b/activesupport/lib/active_support/inflector.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # in case active_support/inflector is required without the rest of active_support
 require "active_support/inflector/inflections"
 require "active_support/inflector/transliterate"
diff --git a/activesupport/lib/active_support/inflector/inflections.rb b/activesupport/lib/active_support/inflector/inflections.rb
index 5891359804..c47a2e34e1 100644
--- a/activesupport/lib/active_support/inflector/inflections.rb
+++ b/activesupport/lib/active_support/inflector/inflections.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "active_support/core_ext/array/prepend_and_append"
 require "active_support/core_ext/regexp"
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb
index bdcb101f29..ff1a0cb8c7 100644
--- a/activesupport/lib/active_support/inflector/methods.rb
+++ b/activesupport/lib/active_support/inflector/methods.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/inflections"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/inflector/transliterate.rb b/activesupport/lib/active_support/inflector/transliterate.rb
index 94ea635066..de6dd2720b 100644
--- a/activesupport/lib/active_support/inflector/transliterate.rb
+++ b/activesupport/lib/active_support/inflector/transliterate.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/multibyte"
 require "active_support/i18n"
 
diff --git a/activesupport/lib/active_support/json.rb b/activesupport/lib/active_support/json.rb
index 7b776ed361..da938d1555 100644
--- a/activesupport/lib/active_support/json.rb
+++ b/activesupport/lib/active_support/json.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 require "active_support/json/decoding"
 require "active_support/json/encoding"
diff --git a/activesupport/lib/active_support/json/decoding.rb b/activesupport/lib/active_support/json/decoding.rb
index 84dc30cbdb..f487fa0c65 100644
--- a/activesupport/lib/active_support/json/decoding.rb
+++ b/activesupport/lib/active_support/json/decoding.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "active_support/core_ext/module/delegation"
 require "json"
diff --git a/activesupport/lib/active_support/json/encoding.rb b/activesupport/lib/active_support/json/encoding.rb
index 56d14a23d3..defaf3f395 100644
--- a/activesupport/lib/active_support/json/encoding.rb
+++ b/activesupport/lib/active_support/json/encoding.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/json"
 require "active_support/core_ext/module/delegation"
 
diff --git a/activesupport/lib/active_support/key_generator.rb b/activesupport/lib/active_support/key_generator.rb
index a0b2a70ee3..23ab804eb1 100644
--- a/activesupport/lib/active_support/key_generator.rb
+++ b/activesupport/lib/active_support/key_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "concurrent/map"
 require "openssl"
 
diff --git a/activesupport/lib/active_support/lazy_load_hooks.rb b/activesupport/lib/active_support/lazy_load_hooks.rb
index b1fc6b331b..720ed47331 100644
--- a/activesupport/lib/active_support/lazy_load_hooks.rb
+++ b/activesupport/lib/active_support/lazy_load_hooks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # lazy_load_hooks allows Rails to lazily load a lot of components and thus
   # making the app boot faster. Because of this feature now there is no need to
diff --git a/activesupport/lib/active_support/log_subscriber.rb b/activesupport/lib/active_support/log_subscriber.rb
index 449239208b..a05758d6aa 100644
--- a/activesupport/lib/active_support/log_subscriber.rb
+++ b/activesupport/lib/active_support/log_subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "active_support/core_ext/class/attribute"
 require "active_support/subscriber"
diff --git a/activesupport/lib/active_support/log_subscriber/test_helper.rb b/activesupport/lib/active_support/log_subscriber/test_helper.rb
index 57d522c12d..953ee77c2a 100644
--- a/activesupport/lib/active_support/log_subscriber/test_helper.rb
+++ b/activesupport/lib/active_support/log_subscriber/test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/log_subscriber"
 require "active_support/logger"
 require "active_support/notifications"
diff --git a/activesupport/lib/active_support/logger.rb b/activesupport/lib/active_support/logger.rb
index 7bf835a727..ea09d7d2df 100644
--- a/activesupport/lib/active_support/logger.rb
+++ b/activesupport/lib/active_support/logger.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/logger_silence"
 require "active_support/logger_thread_safe_level"
 require "logger"
diff --git a/activesupport/lib/active_support/logger_silence.rb b/activesupport/lib/active_support/logger_silence.rb
index d2dc2af7fe..9c64afaaca 100644
--- a/activesupport/lib/active_support/logger_silence.rb
+++ b/activesupport/lib/active_support/logger_silence.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/core_ext/module/attribute_accessors"
 require "concurrent"
diff --git a/activesupport/lib/active_support/logger_thread_safe_level.rb b/activesupport/lib/active_support/logger_thread_safe_level.rb
index c64ae4d95a..7fb175dea6 100644
--- a/activesupport/lib/active_support/logger_thread_safe_level.rb
+++ b/activesupport/lib/active_support/logger_thread_safe_level.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/message_encryptor.rb b/activesupport/lib/active_support/message_encryptor.rb
index 84e5508c74..9225615576 100644
--- a/activesupport/lib/active_support/message_encryptor.rb
+++ b/activesupport/lib/active_support/message_encryptor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "openssl"
 require "base64"
 require "active_support/core_ext/array/extract_options"
diff --git a/activesupport/lib/active_support/message_verifier.rb b/activesupport/lib/active_support/message_verifier.rb
index 15945185a4..8419e858c6 100644
--- a/activesupport/lib/active_support/message_verifier.rb
+++ b/activesupport/lib/active_support/message_verifier.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "base64"
 require "active_support/core_ext/object/blank"
 require "active_support/security_utils"
diff --git a/activesupport/lib/active_support/multibyte.rb b/activesupport/lib/active_support/multibyte.rb
index 0a3418ae95..f7c7befee0 100644
--- a/activesupport/lib/active_support/multibyte.rb
+++ b/activesupport/lib/active_support/multibyte.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport #:nodoc:
   module Multibyte
     autoload :Chars, "active_support/multibyte/chars"
diff --git a/activesupport/lib/active_support/multibyte/chars.rb b/activesupport/lib/active_support/multibyte/chars.rb
index efe052a4e4..8c58466556 100644
--- a/activesupport/lib/active_support/multibyte/chars.rb
+++ b/activesupport/lib/active_support/multibyte/chars.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/json"
 require "active_support/core_ext/string/access"
 require "active_support/core_ext/string/behavior"
diff --git a/activesupport/lib/active_support/multibyte/unicode.rb b/activesupport/lib/active_support/multibyte/unicode.rb
index 92575b1c9b..8223e45e5a 100644
--- a/activesupport/lib/active_support/multibyte/unicode.rb
+++ b/activesupport/lib/active_support/multibyte/unicode.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Multibyte
     module Unicode
diff --git a/activesupport/lib/active_support/notifications.rb b/activesupport/lib/active_support/notifications.rb
index e1230c052b..37dfdc0422 100644
--- a/activesupport/lib/active_support/notifications.rb
+++ b/activesupport/lib/active_support/notifications.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/notifications/instrumenter"
 require "active_support/notifications/fanout"
 require "active_support/per_thread_registry"
diff --git a/activesupport/lib/active_support/notifications/fanout.rb b/activesupport/lib/active_support/notifications/fanout.rb
index b69d1bcd25..9da115f552 100644
--- a/activesupport/lib/active_support/notifications/fanout.rb
+++ b/activesupport/lib/active_support/notifications/fanout.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "mutex_m"
 require "concurrent/map"
 
diff --git a/activesupport/lib/active_support/notifications/instrumenter.rb b/activesupport/lib/active_support/notifications/instrumenter.rb
index 00936f5b9e..e11e2e0689 100644
--- a/activesupport/lib/active_support/notifications/instrumenter.rb
+++ b/activesupport/lib/active_support/notifications/instrumenter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/number_helper.rb b/activesupport/lib/active_support/number_helper.rb
index 965664eb65..9cb2821cb6 100644
--- a/activesupport/lib/active_support/number_helper.rb
+++ b/activesupport/lib/active_support/number_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     extend ActiveSupport::Autoload
diff --git a/activesupport/lib/active_support/number_helper/number_converter.rb b/activesupport/lib/active_support/number_helper/number_converter.rb
index 33f1aab852..ce363287cf 100644
--- a/activesupport/lib/active_support/number_helper/number_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/big_decimal/conversions"
 require "active_support/core_ext/object/blank"
 require "active_support/core_ext/hash/keys"
diff --git a/activesupport/lib/active_support/number_helper/number_to_currency_converter.rb b/activesupport/lib/active_support/number_helper/number_to_currency_converter.rb
index f3c0030ad7..0f9dce722f 100644
--- a/activesupport/lib/active_support/number_helper/number_to_currency_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_currency_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/numeric/inquiry"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/number_helper/number_to_delimited_converter.rb b/activesupport/lib/active_support/number_helper/number_to_delimited_converter.rb
index 620e6b4282..e3b35531b1 100644
--- a/activesupport/lib/active_support/number_helper/number_to_delimited_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_delimited_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToDelimitedConverter < NumberConverter #:nodoc:
diff --git a/activesupport/lib/active_support/number_helper/number_to_human_converter.rb b/activesupport/lib/active_support/number_helper/number_to_human_converter.rb
index 852a76fbb6..040343b5dd 100644
--- a/activesupport/lib/active_support/number_helper/number_to_human_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_human_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToHumanConverter < NumberConverter # :nodoc:
diff --git a/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb b/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb
index a1ebb92fe7..f263dbe9f8 100644
--- a/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToHumanSizeConverter < NumberConverter #:nodoc:
diff --git a/activesupport/lib/active_support/number_helper/number_to_percentage_converter.rb b/activesupport/lib/active_support/number_helper/number_to_percentage_converter.rb
index 9285d7d93f..ac647ca9b7 100644
--- a/activesupport/lib/active_support/number_helper/number_to_percentage_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_percentage_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToPercentageConverter < NumberConverter # :nodoc:
diff --git a/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
index e1f2fec55b..3546ee5c2a 100644
--- a/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToPhoneConverter < NumberConverter #:nodoc:
diff --git a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
index 6e8b5ee653..c32d85a45f 100644
--- a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class NumberToRoundedConverter < NumberConverter # :nodoc:
diff --git a/activesupport/lib/active_support/number_helper/rounding_helper.rb b/activesupport/lib/active_support/number_helper/rounding_helper.rb
index f5d5f4664b..63b48444a6 100644
--- a/activesupport/lib/active_support/number_helper/rounding_helper.rb
+++ b/activesupport/lib/active_support/number_helper/rounding_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module NumberHelper
     class RoundingHelper # :nodoc:
diff --git a/activesupport/lib/active_support/option_merger.rb b/activesupport/lib/active_support/option_merger.rb
index cbbab957b1..0f2caa98f2 100644
--- a/activesupport/lib/active_support/option_merger.rb
+++ b/activesupport/lib/active_support/option_merger.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/deep_merge"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index b07b89447e..3aa0a14f04 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 
 YAML.add_builtin_type("omap") do |type, val|
diff --git a/activesupport/lib/active_support/ordered_options.rb b/activesupport/lib/active_support/ordered_options.rb
index 957d427af2..04d6dfaf9c 100644
--- a/activesupport/lib/active_support/ordered_options.rb
+++ b/activesupport/lib/active_support/ordered_options.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/blank"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/per_thread_registry.rb b/activesupport/lib/active_support/per_thread_registry.rb
index 362d7e45cc..02431704d3 100644
--- a/activesupport/lib/active_support/per_thread_registry.rb
+++ b/activesupport/lib/active_support/per_thread_registry.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/delegation"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/proxy_object.rb b/activesupport/lib/active_support/proxy_object.rb
index df84ab6225..20a0fd8e62 100644
--- a/activesupport/lib/active_support/proxy_object.rb
+++ b/activesupport/lib/active_support/proxy_object.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # A class with no predefined methods that behaves similarly to Builder's
   # BlankSlate. Used for proxy classes.
diff --git a/activesupport/lib/active_support/rails.rb b/activesupport/lib/active_support/rails.rb
index 793baabe83..f6b018f0d3 100644
--- a/activesupport/lib/active_support/rails.rb
+++ b/activesupport/lib/active_support/rails.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # This is private interface.
 #
 # Rails components cherry pick from Active Support as needed, but there are a
diff --git a/activesupport/lib/active_support/railtie.rb b/activesupport/lib/active_support/railtie.rb
index b65a177f11..45bc51311b 100644
--- a/activesupport/lib/active_support/railtie.rb
+++ b/activesupport/lib/active_support/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "active_support/i18n_railtie"
 
diff --git a/activesupport/lib/active_support/reloader.rb b/activesupport/lib/active_support/reloader.rb
index ea0b64fb0b..9558146201 100644
--- a/activesupport/lib/active_support/reloader.rb
+++ b/activesupport/lib/active_support/reloader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/execution_wrapper"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/rescuable.rb b/activesupport/lib/active_support/rescuable.rb
index 0d746f4dda..826832ba7d 100644
--- a/activesupport/lib/active_support/rescuable.rb
+++ b/activesupport/lib/active_support/rescuable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/core_ext/class/attribute"
 require "active_support/core_ext/string/inflections"
diff --git a/activesupport/lib/active_support/security_utils.rb b/activesupport/lib/active_support/security_utils.rb
index 2e61a72213..b655d64449 100644
--- a/activesupport/lib/active_support/security_utils.rb
+++ b/activesupport/lib/active_support/security_utils.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "digest"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/string_inquirer.rb b/activesupport/lib/active_support/string_inquirer.rb
index 03bcbb2555..90eac89c9e 100644
--- a/activesupport/lib/active_support/string_inquirer.rb
+++ b/activesupport/lib/active_support/string_inquirer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   # Wrapping a string in this class gives you a prettier way to test
   # for equality. The value returned by <tt>Rails.env</tt> is wrapped
diff --git a/activesupport/lib/active_support/subscriber.rb b/activesupport/lib/active_support/subscriber.rb
index 09ab992dd5..2924139755 100644
--- a/activesupport/lib/active_support/subscriber.rb
+++ b/activesupport/lib/active_support/subscriber.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/per_thread_registry"
 require "active_support/notifications"
 
diff --git a/activesupport/lib/active_support/tagged_logging.rb b/activesupport/lib/active_support/tagged_logging.rb
index 42e2917bda..ad134c49b6 100644
--- a/activesupport/lib/active_support/tagged_logging.rb
+++ b/activesupport/lib/active_support/tagged_logging.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/delegation"
 require "active_support/core_ext/object/blank"
 require "logger"
diff --git a/activesupport/lib/active_support/test_case.rb b/activesupport/lib/active_support/test_case.rb
index 156c839950..3de4ccc1da 100644
--- a/activesupport/lib/active_support/test_case.rb
+++ b/activesupport/lib/active_support/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 gem "minitest" # make sure we get the gem, not stdlib
 require "minitest"
 require "active_support/testing/tagged_logging"
diff --git a/activesupport/lib/active_support/testing/assertions.rb b/activesupport/lib/active_support/testing/assertions.rb
index d7bb5e5bdf..28e1df8870 100644
--- a/activesupport/lib/active_support/testing/assertions.rb
+++ b/activesupport/lib/active_support/testing/assertions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     module Assertions
diff --git a/activesupport/lib/active_support/testing/autorun.rb b/activesupport/lib/active_support/testing/autorun.rb
index 40ae696a34..a18788f38e 100644
--- a/activesupport/lib/active_support/testing/autorun.rb
+++ b/activesupport/lib/active_support/testing/autorun.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 gem "minitest"
 
 require "minitest"
diff --git a/activesupport/lib/active_support/testing/constant_lookup.rb b/activesupport/lib/active_support/testing/constant_lookup.rb
index 107770b63b..647395d2b3 100644
--- a/activesupport/lib/active_support/testing/constant_lookup.rb
+++ b/activesupport/lib/active_support/testing/constant_lookup.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/inflector"
 
diff --git a/activesupport/lib/active_support/testing/declarative.rb b/activesupport/lib/active_support/testing/declarative.rb
index 601f6fb16d..53ab3ebf78 100644
--- a/activesupport/lib/active_support/testing/declarative.rb
+++ b/activesupport/lib/active_support/testing/declarative.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     module Declarative
diff --git a/activesupport/lib/active_support/testing/deprecation.rb b/activesupport/lib/active_support/testing/deprecation.rb
index 1c50abecfd..58911570e8 100644
--- a/activesupport/lib/active_support/testing/deprecation.rb
+++ b/activesupport/lib/active_support/testing/deprecation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/deprecation"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/lib/active_support/testing/file_fixtures.rb b/activesupport/lib/active_support/testing/file_fixtures.rb
index 56f80fb547..affb84cda5 100644
--- a/activesupport/lib/active_support/testing/file_fixtures.rb
+++ b/activesupport/lib/active_support/testing/file_fixtures.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     # Adds simple access to sample files called file fixtures.
diff --git a/activesupport/lib/active_support/testing/isolation.rb b/activesupport/lib/active_support/testing/isolation.rb
index 4d43c06085..54c3263efa 100644
--- a/activesupport/lib/active_support/testing/isolation.rb
+++ b/activesupport/lib/active_support/testing/isolation.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     module Isolation
diff --git a/activesupport/lib/active_support/testing/method_call_assertions.rb b/activesupport/lib/active_support/testing/method_call_assertions.rb
index d33224e9c3..6b07416fdc 100644
--- a/activesupport/lib/active_support/testing/method_call_assertions.rb
+++ b/activesupport/lib/active_support/testing/method_call_assertions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "minitest/mock"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/testing/setup_and_teardown.rb b/activesupport/lib/active_support/testing/setup_and_teardown.rb
index cd1b7bd832..358c79c321 100644
--- a/activesupport/lib/active_support/testing/setup_and_teardown.rb
+++ b/activesupport/lib/active_support/testing/setup_and_teardown.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "active_support/callbacks"
 
diff --git a/activesupport/lib/active_support/testing/stream.rb b/activesupport/lib/active_support/testing/stream.rb
index 4e8303f058..1d06b94559 100644
--- a/activesupport/lib/active_support/testing/stream.rb
+++ b/activesupport/lib/active_support/testing/stream.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     module Stream #:nodoc:
diff --git a/activesupport/lib/active_support/testing/tagged_logging.rb b/activesupport/lib/active_support/testing/tagged_logging.rb
index 3ca45b4ab5..afdff87b45 100644
--- a/activesupport/lib/active_support/testing/tagged_logging.rb
+++ b/activesupport/lib/active_support/testing/tagged_logging.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   module Testing
     # Logs a "PostsControllerTest: test name" heading before each test to
diff --git a/activesupport/lib/active_support/testing/time_helpers.rb b/activesupport/lib/active_support/testing/time_helpers.rb
index 463aef7705..3d9ff99729 100644
--- a/activesupport/lib/active_support/testing/time_helpers.rb
+++ b/activesupport/lib/active_support/testing/time_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/string/strip" # for strip_heredoc
 require "active_support/core_ext/time/calculations"
 require "concurrent/map"
diff --git a/activesupport/lib/active_support/time.rb b/activesupport/lib/active_support/time.rb
index 557f082948..7658228ca6 100644
--- a/activesupport/lib/active_support/time.rb
+++ b/activesupport/lib/active_support/time.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ActiveSupport
   autoload :Duration, "active_support/duration"
   autoload :TimeWithZone, "active_support/time_with_zone"
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index 21eb33176a..ecb9fb6785 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/duration"
 require "active_support/values/time_zone"
 require "active_support/core_ext/object/acts_like"
diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index 06d7f990ae..96a541a4ef 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "tzinfo"
 require "concurrent/map"
 require "active_support/core_ext/object/blank"
diff --git a/activesupport/lib/active_support/version.rb b/activesupport/lib/active_support/version.rb
index e2afb871e7..20b91ac911 100644
--- a/activesupport/lib/active_support/version.rb
+++ b/activesupport/lib/active_support/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/xml_mini.rb b/activesupport/lib/active_support/xml_mini.rb
index df651c5766..782fb41288 100644
--- a/activesupport/lib/active_support/xml_mini.rb
+++ b/activesupport/lib/active_support/xml_mini.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "time"
 require "base64"
 require "bigdecimal"
diff --git a/activesupport/lib/active_support/xml_mini/jdom.rb b/activesupport/lib/active_support/xml_mini/jdom.rb
index 328917275d..a7939b3185 100644
--- a/activesupport/lib/active_support/xml_mini/jdom.rb
+++ b/activesupport/lib/active_support/xml_mini/jdom.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 raise "JRuby is required to use the JDOM backend for XmlMini" unless RUBY_PLATFORM.include?("java")
 
 require "jruby"
diff --git a/activesupport/lib/active_support/xml_mini/libxml.rb b/activesupport/lib/active_support/xml_mini/libxml.rb
index 9d2c91e281..5187316389 100644
--- a/activesupport/lib/active_support/xml_mini/libxml.rb
+++ b/activesupport/lib/active_support/xml_mini/libxml.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "libxml"
 require "active_support/core_ext/object/blank"
 require "stringio"
diff --git a/activesupport/lib/active_support/xml_mini/libxmlsax.rb b/activesupport/lib/active_support/xml_mini/libxmlsax.rb
index 0ce297427e..b1b5517414 100644
--- a/activesupport/lib/active_support/xml_mini/libxmlsax.rb
+++ b/activesupport/lib/active_support/xml_mini/libxmlsax.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "libxml"
 require "active_support/core_ext/object/blank"
 require "stringio"
diff --git a/activesupport/lib/active_support/xml_mini/nokogiri.rb b/activesupport/lib/active_support/xml_mini/nokogiri.rb
index 1d1bffe540..14176747f9 100644
--- a/activesupport/lib/active_support/xml_mini/nokogiri.rb
+++ b/activesupport/lib/active_support/xml_mini/nokogiri.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "nokogiri"
 rescue LoadError => e
diff --git a/activesupport/lib/active_support/xml_mini/nokogirisax.rb b/activesupport/lib/active_support/xml_mini/nokogirisax.rb
index f575e2829c..902faac312 100644
--- a/activesupport/lib/active_support/xml_mini/nokogirisax.rb
+++ b/activesupport/lib/active_support/xml_mini/nokogirisax.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "nokogiri"
 rescue LoadError => e
diff --git a/activesupport/lib/active_support/xml_mini/rexml.rb b/activesupport/lib/active_support/xml_mini/rexml.rb
index 49ab277f29..30e17965a1 100644
--- a/activesupport/lib/active_support/xml_mini/rexml.rb
+++ b/activesupport/lib/active_support/xml_mini/rexml.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/reporting"
 require "active_support/core_ext/object/blank"
 require "stringio"
diff --git a/activesupport/test/abstract_unit.rb b/activesupport/test/abstract_unit.rb
index 3004272629..c4f34c0abf 100644
--- a/activesupport/test/abstract_unit.rb
+++ b/activesupport/test/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ORIG_ARGV = ARGV.dup
 
 require "active_support/core_ext/kernel/reporting"
diff --git a/activesupport/test/array_inquirer_test.rb b/activesupport/test/array_inquirer_test.rb
index c674a80d29..5b2bc82905 100644
--- a/activesupport/test/array_inquirer_test.rb
+++ b/activesupport/test/array_inquirer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 
diff --git a/activesupport/test/autoload_test.rb b/activesupport/test/autoload_test.rb
index 65838041ea..6c8aa3e055 100644
--- a/activesupport/test/autoload_test.rb
+++ b/activesupport/test/autoload_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class TestAutoloadModule < ActiveSupport::TestCase
diff --git a/activesupport/test/autoloading_fixtures/a/b.rb b/activesupport/test/autoloading_fixtures/a/b.rb
index 8f2d83719d..0dbbbbd181 100644
--- a/activesupport/test/autoloading_fixtures/a/b.rb
+++ b/activesupport/test/autoloading_fixtures/a/b.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class A::B
 end
diff --git a/activesupport/test/autoloading_fixtures/a/c/d.rb b/activesupport/test/autoloading_fixtures/a/c/d.rb
index fd50bb95c6..2c0ec5f182 100644
--- a/activesupport/test/autoloading_fixtures/a/c/d.rb
+++ b/activesupport/test/autoloading_fixtures/a/c/d.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class A::C::D
 end
diff --git a/activesupport/test/autoloading_fixtures/a/c/em/f.rb b/activesupport/test/autoloading_fixtures/a/c/em/f.rb
index 298b63c916..3ff1b7efa0 100644
--- a/activesupport/test/autoloading_fixtures/a/c/em/f.rb
+++ b/activesupport/test/autoloading_fixtures/a/c/em/f.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class A::C::EM::F
 end
diff --git a/activesupport/test/autoloading_fixtures/application.rb b/activesupport/test/autoloading_fixtures/application.rb
index ae3ccf487e..d7d3096dcb 100644
--- a/activesupport/test/autoloading_fixtures/application.rb
+++ b/activesupport/test/autoloading_fixtures/application.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 ApplicationController = 10
diff --git a/activesupport/test/autoloading_fixtures/circular1.rb b/activesupport/test/autoloading_fixtures/circular1.rb
index f6041bde77..a45761f066 100644
--- a/activesupport/test/autoloading_fixtures/circular1.rb
+++ b/activesupport/test/autoloading_fixtures/circular1.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 silence_warnings do
   Circular2
 end
diff --git a/activesupport/test/autoloading_fixtures/circular2.rb b/activesupport/test/autoloading_fixtures/circular2.rb
index 178bbca3bd..c847fa5001 100644
--- a/activesupport/test/autoloading_fixtures/circular2.rb
+++ b/activesupport/test/autoloading_fixtures/circular2.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 Circular1
 
 class Circular2
diff --git a/activesupport/test/autoloading_fixtures/class_folder.rb b/activesupport/test/autoloading_fixtures/class_folder.rb
index 48c2993600..6ee8182214 100644
--- a/activesupport/test/autoloading_fixtures/class_folder.rb
+++ b/activesupport/test/autoloading_fixtures/class_folder.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ClassFolder
   ConstantInClassFolder = "indeed"
 end
diff --git a/activesupport/test/autoloading_fixtures/class_folder/class_folder_subclass.rb b/activesupport/test/autoloading_fixtures/class_folder/class_folder_subclass.rb
index 866d3547f6..4df069cab6 100644
--- a/activesupport/test/autoloading_fixtures/class_folder/class_folder_subclass.rb
+++ b/activesupport/test/autoloading_fixtures/class_folder/class_folder_subclass.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ClassFolder::ClassFolderSubclass < ClassFolder
   ConstantInClassFolder = "indeed"
 end
diff --git a/activesupport/test/autoloading_fixtures/class_folder/inline_class.rb b/activesupport/test/autoloading_fixtures/class_folder/inline_class.rb
index 6c20a3a9a7..8235e90724 100644
--- a/activesupport/test/autoloading_fixtures/class_folder/inline_class.rb
+++ b/activesupport/test/autoloading_fixtures/class_folder/inline_class.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ClassFolder::InlineClass
 end
diff --git a/activesupport/test/autoloading_fixtures/class_folder/nested_class.rb b/activesupport/test/autoloading_fixtures/class_folder/nested_class.rb
index ee35eac3fc..57a13d89ea 100644
--- a/activesupport/test/autoloading_fixtures/class_folder/nested_class.rb
+++ b/activesupport/test/autoloading_fixtures/class_folder/nested_class.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class ClassFolder
   class NestedClass
   end
diff --git a/activesupport/test/autoloading_fixtures/conflict.rb b/activesupport/test/autoloading_fixtures/conflict.rb
index 6731ea51d8..d7f42b5d5f 100644
--- a/activesupport/test/autoloading_fixtures/conflict.rb
+++ b/activesupport/test/autoloading_fixtures/conflict.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 Conflict = 2
diff --git a/activesupport/test/autoloading_fixtures/counting_loader.rb b/activesupport/test/autoloading_fixtures/counting_loader.rb
index 2a4001b815..4225c4412c 100644
--- a/activesupport/test/autoloading_fixtures/counting_loader.rb
+++ b/activesupport/test/autoloading_fixtures/counting_loader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $counting_loaded_times ||= 0
 $counting_loaded_times += 1
 
diff --git a/activesupport/test/autoloading_fixtures/cross_site_dependency.rb b/activesupport/test/autoloading_fixtures/cross_site_dependency.rb
index 4eff14e888..de941bf271 100644
--- a/activesupport/test/autoloading_fixtures/cross_site_dependency.rb
+++ b/activesupport/test/autoloading_fixtures/cross_site_dependency.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class CrossSiteDependency
 end
diff --git a/activesupport/test/autoloading_fixtures/d.rb b/activesupport/test/autoloading_fixtures/d.rb
index c4217362d8..52850e1e1a 100644
--- a/activesupport/test/autoloading_fixtures/d.rb
+++ b/activesupport/test/autoloading_fixtures/d.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class D
 end
diff --git a/activesupport/test/autoloading_fixtures/em.rb b/activesupport/test/autoloading_fixtures/em.rb
index 38bb323e9e..e47024999e 100644
--- a/activesupport/test/autoloading_fixtures/em.rb
+++ b/activesupport/test/autoloading_fixtures/em.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class EM
 end
diff --git a/activesupport/test/autoloading_fixtures/html/some_class.rb b/activesupport/test/autoloading_fixtures/html/some_class.rb
index 495372fef3..b43d15d891 100644
--- a/activesupport/test/autoloading_fixtures/html/some_class.rb
+++ b/activesupport/test/autoloading_fixtures/html/some_class.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module HTML
   class SomeClass
   end
diff --git a/activesupport/test/autoloading_fixtures/load_path/loaded_constant.rb b/activesupport/test/autoloading_fixtures/load_path/loaded_constant.rb
index e5f73d9f0c..d2c4f6b0c5 100644
--- a/activesupport/test/autoloading_fixtures/load_path/loaded_constant.rb
+++ b/activesupport/test/autoloading_fixtures/load_path/loaded_constant.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 module LoadedConstant
 end
diff --git a/activesupport/test/autoloading_fixtures/loads_constant.rb b/activesupport/test/autoloading_fixtures/loads_constant.rb
index cb7b381de3..0b30dc8bca 100644
--- a/activesupport/test/autoloading_fixtures/loads_constant.rb
+++ b/activesupport/test/autoloading_fixtures/loads_constant.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module LoadsConstant
 end
 
diff --git a/activesupport/test/autoloading_fixtures/module_folder/inline_class.rb b/activesupport/test/autoloading_fixtures/module_folder/inline_class.rb
index 5ed98cd4cf..ca83437046 100644
--- a/activesupport/test/autoloading_fixtures/module_folder/inline_class.rb
+++ b/activesupport/test/autoloading_fixtures/module_folder/inline_class.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ModuleFolder::InlineClass
 end
diff --git a/activesupport/test/autoloading_fixtures/module_folder/nested_class.rb b/activesupport/test/autoloading_fixtures/module_folder/nested_class.rb
index afed4b0a7e..fc4076bd0a 100644
--- a/activesupport/test/autoloading_fixtures/module_folder/nested_class.rb
+++ b/activesupport/test/autoloading_fixtures/module_folder/nested_class.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module ModuleFolder
   class NestedClass
   end
diff --git a/activesupport/test/autoloading_fixtures/module_folder/nested_sibling.rb b/activesupport/test/autoloading_fixtures/module_folder/nested_sibling.rb
index a16cc566dd..04c426833e 100644
--- a/activesupport/test/autoloading_fixtures/module_folder/nested_sibling.rb
+++ b/activesupport/test/autoloading_fixtures/module_folder/nested_sibling.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ModuleFolder::NestedSibling
 end
diff --git a/activesupport/test/autoloading_fixtures/module_with_custom_const_missing/a/b.rb b/activesupport/test/autoloading_fixtures/module_with_custom_const_missing/a/b.rb
index a6ed49e0be..4f2020c503 100644
--- a/activesupport/test/autoloading_fixtures/module_with_custom_const_missing/a/b.rb
+++ b/activesupport/test/autoloading_fixtures/module_with_custom_const_missing/a/b.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 ModuleWithCustomConstMissing::A::B = "10"
diff --git a/activesupport/test/autoloading_fixtures/multiple_constant_file.rb b/activesupport/test/autoloading_fixtures/multiple_constant_file.rb
index 33d371c830..a9ff4eb89c 100644
--- a/activesupport/test/autoloading_fixtures/multiple_constant_file.rb
+++ b/activesupport/test/autoloading_fixtures/multiple_constant_file.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 MultipleConstantFile = 10
 SiblingConstant = MultipleConstantFile * 2
diff --git a/activesupport/test/autoloading_fixtures/prepend.rb b/activesupport/test/autoloading_fixtures/prepend.rb
index 1bef4ab5b3..3134d1df2b 100644
--- a/activesupport/test/autoloading_fixtures/prepend.rb
+++ b/activesupport/test/autoloading_fixtures/prepend.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class SubClassConflict
 end
 
diff --git a/activesupport/test/autoloading_fixtures/prepend/sub_class_conflict.rb b/activesupport/test/autoloading_fixtures/prepend/sub_class_conflict.rb
index d76b575b06..090dda3043 100644
--- a/activesupport/test/autoloading_fixtures/prepend/sub_class_conflict.rb
+++ b/activesupport/test/autoloading_fixtures/prepend/sub_class_conflict.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Prepend::SubClassConflict
 end
diff --git a/activesupport/test/autoloading_fixtures/raises_arbitrary_exception.rb b/activesupport/test/autoloading_fixtures/raises_arbitrary_exception.rb
index 814c41c004..e477ab21d0 100644
--- a/activesupport/test/autoloading_fixtures/raises_arbitrary_exception.rb
+++ b/activesupport/test/autoloading_fixtures/raises_arbitrary_exception.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 RaisesArbitraryException = 1
 _ = A::B # Autoloading recursion, also expected to be watched and discarded.
 
diff --git a/activesupport/test/autoloading_fixtures/raises_name_error.rb b/activesupport/test/autoloading_fixtures/raises_name_error.rb
index 051f839994..a49960abf0 100644
--- a/activesupport/test/autoloading_fixtures/raises_name_error.rb
+++ b/activesupport/test/autoloading_fixtures/raises_name_error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class RaisesNameError
   FooBarBaz
 end
diff --git a/activesupport/test/autoloading_fixtures/raises_no_method_error.rb b/activesupport/test/autoloading_fixtures/raises_no_method_error.rb
index 1db51879c7..e1b8fce24a 100644
--- a/activesupport/test/autoloading_fixtures/raises_no_method_error.rb
+++ b/activesupport/test/autoloading_fixtures/raises_no_method_error.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class RaisesNoMethodError
   self.foobar_method_doesnt_exist
 end
diff --git a/activesupport/test/autoloading_fixtures/requires_constant.rb b/activesupport/test/autoloading_fixtures/requires_constant.rb
index a26e265f71..f04dcc4091 100644
--- a/activesupport/test/autoloading_fixtures/requires_constant.rb
+++ b/activesupport/test/autoloading_fixtures/requires_constant.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "loaded_constant"
 
 module RequiresConstant
diff --git a/activesupport/test/autoloading_fixtures/should_not_be_required.rb b/activesupport/test/autoloading_fixtures/should_not_be_required.rb
index c1fada8213..1fcf170cc5 100644
--- a/activesupport/test/autoloading_fixtures/should_not_be_required.rb
+++ b/activesupport/test/autoloading_fixtures/should_not_be_required.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 ShouldNotBeAutoloaded = 0
diff --git a/activesupport/test/autoloading_fixtures/throws.rb b/activesupport/test/autoloading_fixtures/throws.rb
index 431111afbe..e1d96cc512 100644
--- a/activesupport/test/autoloading_fixtures/throws.rb
+++ b/activesupport/test/autoloading_fixtures/throws.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 Throws = 1
 _ = A::B # Autoloading recursion, expected to be discarded.
 
diff --git a/activesupport/test/autoloading_fixtures/typo.rb b/activesupport/test/autoloading_fixtures/typo.rb
index 0b74d73f3f..0ffe07c2b3 100644
--- a/activesupport/test/autoloading_fixtures/typo.rb
+++ b/activesupport/test/autoloading_fixtures/typo.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 TypO = 1
diff --git a/activesupport/test/benchmarkable_test.rb b/activesupport/test/benchmarkable_test.rb
index cb8cb89a30..210b9cb9fd 100644
--- a/activesupport/test/benchmarkable_test.rb
+++ b/activesupport/test/benchmarkable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class BenchmarkableTest < ActiveSupport::TestCase
diff --git a/activesupport/test/broadcast_logger_test.rb b/activesupport/test/broadcast_logger_test.rb
index c91e3f770f..184d0ebddd 100644
--- a/activesupport/test/broadcast_logger_test.rb
+++ b/activesupport/test/broadcast_logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActiveSupport
diff --git a/activesupport/test/cache/behaviors.rb b/activesupport/test/cache/behaviors.rb
index c94cbc1156..efd045ac5e 100644
--- a/activesupport/test/cache/behaviors.rb
+++ b/activesupport/test/cache/behaviors.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "behaviors/autoloading_cache_behavior"
 require_relative "behaviors/cache_delete_matched_behavior"
 require_relative "behaviors/cache_increment_decrement_behavior"
diff --git a/activesupport/test/cache/behaviors/autoloading_cache_behavior.rb b/activesupport/test/cache/behaviors/autoloading_cache_behavior.rb
index 41a3a873b6..5f8af331f6 100644
--- a/activesupport/test/cache/behaviors/autoloading_cache_behavior.rb
+++ b/activesupport/test/cache/behaviors/autoloading_cache_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "dependencies_test_helpers"
 
 module AutoloadingCacheBehavior
diff --git a/activesupport/test/cache/behaviors/cache_delete_matched_behavior.rb b/activesupport/test/cache/behaviors/cache_delete_matched_behavior.rb
index b2cd919da9..b872eb0279 100644
--- a/activesupport/test/cache/behaviors/cache_delete_matched_behavior.rb
+++ b/activesupport/test/cache/behaviors/cache_delete_matched_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module CacheDeleteMatchedBehavior
   def test_delete_matched
     @cache.write("foo", "bar")
diff --git a/activesupport/test/cache/behaviors/cache_increment_decrement_behavior.rb b/activesupport/test/cache/behaviors/cache_increment_decrement_behavior.rb
index 45f92f10b2..0d32339565 100644
--- a/activesupport/test/cache/behaviors/cache_increment_decrement_behavior.rb
+++ b/activesupport/test/cache/behaviors/cache_increment_decrement_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module CacheIncrementDecrementBehavior
   def test_increment
     @cache.write("foo", 1, raw: true)
diff --git a/activesupport/test/cache/behaviors/cache_store_behavior.rb b/activesupport/test/cache/behaviors/cache_store_behavior.rb
index 32373644cf..4631e6aee8 100644
--- a/activesupport/test/cache/behaviors/cache_store_behavior.rb
+++ b/activesupport/test/cache/behaviors/cache_store_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Tests the base functionality that should be identical across all cache stores.
 module CacheStoreBehavior
   def test_should_read_and_write_strings
diff --git a/activesupport/test/cache/behaviors/cache_store_version_behavior.rb b/activesupport/test/cache/behaviors/cache_store_version_behavior.rb
index 82f392c86a..a0170c896f 100644
--- a/activesupport/test/cache/behaviors/cache_store_version_behavior.rb
+++ b/activesupport/test/cache/behaviors/cache_store_version_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module CacheStoreVersionBehavior
   ModelWithKeyAndVersion = Struct.new(:cache_key, :cache_version)
 
diff --git a/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb b/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb
index 361903ab82..6adef2916d 100644
--- a/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb
+++ b/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # https://rails.lighthouseapp.com/projects/8994/tickets/6225-memcachestore-cant-deal-with-umlauts-and-special-characters
 # The error is caused by character encodings that can't be compared with ASCII-8BIT regular expressions and by special
 # characters like the umlaut in UTF-8.
diff --git a/activesupport/test/cache/behaviors/local_cache_behavior.rb b/activesupport/test/cache/behaviors/local_cache_behavior.rb
index 730f0306b8..8530296374 100644
--- a/activesupport/test/cache/behaviors/local_cache_behavior.rb
+++ b/activesupport/test/cache/behaviors/local_cache_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module LocalCacheBehavior
   def test_local_writes_are_persistent_on_the_remote_cache
     retval = @cache.with_local_cache do
diff --git a/activesupport/test/cache/cache_entry_test.rb b/activesupport/test/cache/cache_entry_test.rb
index 4a8fc5bed3..e446e39b10 100644
--- a/activesupport/test/cache/cache_entry_test.rb
+++ b/activesupport/test/cache/cache_entry_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/cache_key_test.rb b/activesupport/test/cache/cache_key_test.rb
index 19c40d44d6..ea39d7a299 100644
--- a/activesupport/test/cache/cache_key_test.rb
+++ b/activesupport/test/cache/cache_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/cache_store_logger_test.rb b/activesupport/test/cache/cache_store_logger_test.rb
index 3014c4d57f..621cfebb10 100644
--- a/activesupport/test/cache/cache_store_logger_test.rb
+++ b/activesupport/test/cache/cache_store_logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/cache_store_namespace_test.rb b/activesupport/test/cache/cache_store_namespace_test.rb
index 8df048aad0..e395c88271 100644
--- a/activesupport/test/cache/cache_store_namespace_test.rb
+++ b/activesupport/test/cache/cache_store_namespace_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/cache_store_setting_test.rb b/activesupport/test/cache/cache_store_setting_test.rb
index cc126ec930..cb9b006abe 100644
--- a/activesupport/test/cache/cache_store_setting_test.rb
+++ b/activesupport/test/cache/cache_store_setting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 require "dalli"
diff --git a/activesupport/test/cache/cache_store_write_multi_test.rb b/activesupport/test/cache/cache_store_write_multi_test.rb
index 9355dde0f4..16e3f3b842 100644
--- a/activesupport/test/cache/cache_store_write_multi_test.rb
+++ b/activesupport/test/cache/cache_store_write_multi_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/local_cache_middleware_test.rb b/activesupport/test/cache/local_cache_middleware_test.rb
index 3f0bd40fbd..352502fb43 100644
--- a/activesupport/test/cache/local_cache_middleware_test.rb
+++ b/activesupport/test/cache/local_cache_middleware_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 
diff --git a/activesupport/test/cache/stores/file_store_test.rb b/activesupport/test/cache/stores/file_store_test.rb
index 6ba25bbaec..48b304fe6e 100644
--- a/activesupport/test/cache/stores/file_store_test.rb
+++ b/activesupport/test/cache/stores/file_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 require_relative "../behaviors"
diff --git a/activesupport/test/cache/stores/mem_cache_store_test.rb b/activesupport/test/cache/stores/mem_cache_store_test.rb
index e188f5f881..2dd5264818 100644
--- a/activesupport/test/cache/stores/mem_cache_store_test.rb
+++ b/activesupport/test/cache/stores/mem_cache_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 require_relative "../behaviors"
diff --git a/activesupport/test/cache/stores/memory_store_test.rb b/activesupport/test/cache/stores/memory_store_test.rb
index e8dfe24a2f..3dd1646d56 100644
--- a/activesupport/test/cache/stores/memory_store_test.rb
+++ b/activesupport/test/cache/stores/memory_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 require_relative "../behaviors"
diff --git a/activesupport/test/cache/stores/null_store_test.rb b/activesupport/test/cache/stores/null_store_test.rb
index 0945aceee3..23c4e64ee4 100644
--- a/activesupport/test/cache/stores/null_store_test.rb
+++ b/activesupport/test/cache/stores/null_store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/cache"
 require_relative "../behaviors"
diff --git a/activesupport/test/callback_inheritance_test.rb b/activesupport/test/callback_inheritance_test.rb
index 8872a16282..9e2f7527e0 100644
--- a/activesupport/test/callback_inheritance_test.rb
+++ b/activesupport/test/callback_inheritance_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class GrandParent
diff --git a/activesupport/test/callbacks_test.rb b/activesupport/test/callbacks_test.rb
index 9d924cabb2..4f00afb581 100644
--- a/activesupport/test/callbacks_test.rb
+++ b/activesupport/test/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module CallbacksTest
diff --git a/activesupport/test/class_cache_test.rb b/activesupport/test/class_cache_test.rb
index b3ca3748c2..004b4dc9ce 100644
--- a/activesupport/test/class_cache_test.rb
+++ b/activesupport/test/class_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/dependencies"
 
diff --git a/activesupport/test/clean_backtrace_test.rb b/activesupport/test/clean_backtrace_test.rb
index 7bbc54dfcc..5ed518cdb0 100644
--- a/activesupport/test/clean_backtrace_test.rb
+++ b/activesupport/test/clean_backtrace_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class BacktraceCleanerFilterTest < ActiveSupport::TestCase
diff --git a/activesupport/test/clean_logger_test.rb b/activesupport/test/clean_logger_test.rb
index 923a1cb671..cf37fc5639 100644
--- a/activesupport/test/clean_logger_test.rb
+++ b/activesupport/test/clean_logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 require "active_support/logger"
diff --git a/activesupport/test/concern_test.rb b/activesupport/test/concern_test.rb
index e05704393d..7a5a5414a7 100644
--- a/activesupport/test/concern_test.rb
+++ b/activesupport/test/concern_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/concern"
 
diff --git a/activesupport/test/configurable_test.rb b/activesupport/test/configurable_test.rb
index bd3452334a..3cd6d2d4d0 100644
--- a/activesupport/test/configurable_test.rb
+++ b/activesupport/test/configurable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/configurable"
 
diff --git a/activesupport/test/constantize_test_cases.rb b/activesupport/test/constantize_test_cases.rb
index fa23fd6b65..32b720bcbb 100644
--- a/activesupport/test/constantize_test_cases.rb
+++ b/activesupport/test/constantize_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "dependencies_test_helpers"
 
 module Ace
diff --git a/activesupport/test/core_ext/array/access_test.rb b/activesupport/test/core_ext/array/access_test.rb
index 08af9e1b55..a38ea36d00 100644
--- a/activesupport/test/core_ext/array/access_test.rb
+++ b/activesupport/test/core_ext/array/access_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 
diff --git a/activesupport/test/core_ext/array/conversions_test.rb b/activesupport/test/core_ext/array/conversions_test.rb
index 33d051c514..29e661a99b 100644
--- a/activesupport/test/core_ext/array/conversions_test.rb
+++ b/activesupport/test/core_ext/array/conversions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 require "active_support/core_ext/big_decimal"
diff --git a/activesupport/test/core_ext/array/extract_options_test.rb b/activesupport/test/core_ext/array/extract_options_test.rb
index 09bf97ae6c..1651bee0f6 100644
--- a/activesupport/test/core_ext/array/extract_options_test.rb
+++ b/activesupport/test/core_ext/array/extract_options_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 require "active_support/core_ext/hash"
diff --git a/activesupport/test/core_ext/array/grouping_test.rb b/activesupport/test/core_ext/array/grouping_test.rb
index daf47e9a9f..4c6aadba8c 100644
--- a/activesupport/test/core_ext/array/grouping_test.rb
+++ b/activesupport/test/core_ext/array/grouping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 
diff --git a/activesupport/test/core_ext/array/prepend_append_test.rb b/activesupport/test/core_ext/array/prepend_append_test.rb
index 3b38acf56c..763e26191d 100644
--- a/activesupport/test/core_ext/array/prepend_append_test.rb
+++ b/activesupport/test/core_ext/array/prepend_append_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 
diff --git a/activesupport/test/core_ext/array/wrap_test.rb b/activesupport/test/core_ext/array/wrap_test.rb
index 451f9db2ed..ae846cb3f2 100644
--- a/activesupport/test/core_ext/array/wrap_test.rb
+++ b/activesupport/test/core_ext/array/wrap_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 
diff --git a/activesupport/test/core_ext/bigdecimal_test.rb b/activesupport/test/core_ext/bigdecimal_test.rb
index dbd0762574..43b659546f 100644
--- a/activesupport/test/core_ext/bigdecimal_test.rb
+++ b/activesupport/test/core_ext/bigdecimal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/big_decimal"
 
diff --git a/activesupport/test/core_ext/class/attribute_test.rb b/activesupport/test/core_ext/class/attribute_test.rb
index 2933b62c58..f16043c612 100644
--- a/activesupport/test/core_ext/class/attribute_test.rb
+++ b/activesupport/test/core_ext/class/attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/class/attribute"
 
diff --git a/activesupport/test/core_ext/class_test.rb b/activesupport/test/core_ext/class_test.rb
index c0cabea8fd..a7905196ae 100644
--- a/activesupport/test/core_ext/class_test.rb
+++ b/activesupport/test/core_ext/class_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/class"
 require "set"
diff --git a/activesupport/test/core_ext/date_and_time_behavior.rb b/activesupport/test/core_ext/date_and_time_behavior.rb
index 8d908968ef..6c77e8f313 100644
--- a/activesupport/test/core_ext/date_and_time_behavior.rb
+++ b/activesupport/test/core_ext/date_and_time_behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module DateAndTimeBehavior
diff --git a/activesupport/test/core_ext/date_and_time_compatibility_test.rb b/activesupport/test/core_ext/date_and_time_compatibility_test.rb
index 04b93105d5..6c6205a4d2 100644
--- a/activesupport/test/core_ext/date_and_time_compatibility_test.rb
+++ b/activesupport/test/core_ext/date_and_time_compatibility_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "time_zone_test_helpers"
diff --git a/activesupport/test/core_ext/date_ext_test.rb b/activesupport/test/core_ext/date_ext_test.rb
index 7c6e705936..50bb1004f7 100644
--- a/activesupport/test/core_ext/date_ext_test.rb
+++ b/activesupport/test/core_ext/date_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "core_ext/date_and_time_behavior"
diff --git a/activesupport/test/core_ext/date_time_ext_test.rb b/activesupport/test/core_ext/date_time_ext_test.rb
index beddfe4584..276fa2bfd3 100644
--- a/activesupport/test/core_ext/date_time_ext_test.rb
+++ b/activesupport/test/core_ext/date_time_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "core_ext/date_and_time_behavior"
diff --git a/activesupport/test/core_ext/digest/uuid_test.rb b/activesupport/test/core_ext/digest/uuid_test.rb
index ea3605bf9c..866a03259a 100644
--- a/activesupport/test/core_ext/digest/uuid_test.rb
+++ b/activesupport/test/core_ext/digest/uuid_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/digest/uuid"
 
diff --git a/activesupport/test/core_ext/duration_test.rb b/activesupport/test/core_ext/duration_test.rb
index 32c0ce4317..cd1b505c34 100644
--- a/activesupport/test/core_ext/duration_test.rb
+++ b/activesupport/test/core_ext/duration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/inflector"
 require "active_support/time"
diff --git a/activesupport/test/core_ext/enumerable_test.rb b/activesupport/test/core_ext/enumerable_test.rb
index 3259109b0e..0b345ecf0f 100644
--- a/activesupport/test/core_ext/enumerable_test.rb
+++ b/activesupport/test/core_ext/enumerable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/array"
 require "active_support/core_ext/enumerable"
diff --git a/activesupport/test/core_ext/file_test.rb b/activesupport/test/core_ext/file_test.rb
index 67b1a04429..df5d09acd0 100644
--- a/activesupport/test/core_ext/file_test.rb
+++ b/activesupport/test/core_ext/file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/file"
 
diff --git a/activesupport/test/core_ext/hash/transform_keys_test.rb b/activesupport/test/core_ext/hash/transform_keys_test.rb
index f329246bdd..7a11d827f8 100644
--- a/activesupport/test/core_ext/hash/transform_keys_test.rb
+++ b/activesupport/test/core_ext/hash/transform_keys_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/keys"
 
diff --git a/activesupport/test/core_ext/hash/transform_values_test.rb b/activesupport/test/core_ext/hash/transform_values_test.rb
index 4eb6999510..f2ac4ce6ce 100644
--- a/activesupport/test/core_ext/hash/transform_values_test.rb
+++ b/activesupport/test/core_ext/hash/transform_values_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/hash/transform_values"
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index c533c002a4..18da5fcf5f 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash"
 require "bigdecimal"
diff --git a/activesupport/test/core_ext/integer_ext_test.rb b/activesupport/test/core_ext/integer_ext_test.rb
index a7ea084e7f..137e8ce85f 100644
--- a/activesupport/test/core_ext/integer_ext_test.rb
+++ b/activesupport/test/core_ext/integer_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/integer"
 
diff --git a/activesupport/test/core_ext/kernel/concern_test.rb b/activesupport/test/core_ext/kernel/concern_test.rb
index 1f4fb8029c..e7e4f99d7e 100644
--- a/activesupport/test/core_ext/kernel/concern_test.rb
+++ b/activesupport/test/core_ext/kernel/concern_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/kernel/concern"
 
diff --git a/activesupport/test/core_ext/kernel_test.rb b/activesupport/test/core_ext/kernel_test.rb
index 875598f611..26f5088ede 100644
--- a/activesupport/test/core_ext/kernel_test.rb
+++ b/activesupport/test/core_ext/kernel_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/kernel"
 
diff --git a/activesupport/test/core_ext/load_error_test.rb b/activesupport/test/core_ext/load_error_test.rb
index 3d003fd1d5..44ff6bb051 100644
--- a/activesupport/test/core_ext/load_error_test.rb
+++ b/activesupport/test/core_ext/load_error_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/load_error"
 
diff --git a/activesupport/test/core_ext/marshal_test.rb b/activesupport/test/core_ext/marshal_test.rb
index d17a6fe7f1..cabeed2fae 100644
--- a/activesupport/test/core_ext/marshal_test.rb
+++ b/activesupport/test/core_ext/marshal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/marshal"
 require "dependencies_test_helpers"
diff --git a/activesupport/test/core_ext/module/anonymous_test.rb b/activesupport/test/core_ext/module/anonymous_test.rb
index d667bc0a34..f885444284 100644
--- a/activesupport/test/core_ext/module/anonymous_test.rb
+++ b/activesupport/test/core_ext/module/anonymous_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/anonymous"
 
diff --git a/activesupport/test/core_ext/module/attr_internal_test.rb b/activesupport/test/core_ext/module/attr_internal_test.rb
index 12dc2f101a..8458e278ee 100644
--- a/activesupport/test/core_ext/module/attr_internal_test.rb
+++ b/activesupport/test/core_ext/module/attr_internal_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/attr_internal"
 
diff --git a/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb b/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb
index e8587e3424..af240bc38d 100644
--- a/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb
+++ b/activesupport/test/core_ext/module/attribute_accessor_per_thread_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/attribute_accessors_per_thread"
 
diff --git a/activesupport/test/core_ext/module/attribute_accessor_test.rb b/activesupport/test/core_ext/module/attribute_accessor_test.rb
index 2cf33fcc12..9b185e9381 100644
--- a/activesupport/test/core_ext/module/attribute_accessor_test.rb
+++ b/activesupport/test/core_ext/module/attribute_accessor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/attribute_accessors"
 
diff --git a/activesupport/test/core_ext/module/attribute_aliasing_test.rb b/activesupport/test/core_ext/module/attribute_aliasing_test.rb
index 9e5edda77a..fdfa868851 100644
--- a/activesupport/test/core_ext/module/attribute_aliasing_test.rb
+++ b/activesupport/test/core_ext/module/attribute_aliasing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/aliasing"
 
diff --git a/activesupport/test/core_ext/module/concerning_test.rb b/activesupport/test/core_ext/module/concerning_test.rb
index 64accc06fc..098036828a 100644
--- a/activesupport/test/core_ext/module/concerning_test.rb
+++ b/activesupport/test/core_ext/module/concerning_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/concerning"
 
diff --git a/activesupport/test/core_ext/module/introspection_test.rb b/activesupport/test/core_ext/module/introspection_test.rb
index 589c9455ed..db383850cd 100644
--- a/activesupport/test/core_ext/module/introspection_test.rb
+++ b/activesupport/test/core_ext/module/introspection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/introspection"
 
diff --git a/activesupport/test/core_ext/module/reachable_test.rb b/activesupport/test/core_ext/module/reachable_test.rb
index f8970bc9f4..487c7dee16 100644
--- a/activesupport/test/core_ext/module/reachable_test.rb
+++ b/activesupport/test/core_ext/module/reachable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/reachable"
 
diff --git a/activesupport/test/core_ext/module/remove_method_test.rb b/activesupport/test/core_ext/module/remove_method_test.rb
index 327c66e3ec..0c627f1e74 100644
--- a/activesupport/test/core_ext/module/remove_method_test.rb
+++ b/activesupport/test/core_ext/module/remove_method_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/remove_method"
 
diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb
index b683c4e110..a4d4444d69 100644
--- a/activesupport/test/core_ext/module_test.rb
+++ b/activesupport/test/core_ext/module_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module"
 
diff --git a/activesupport/test/core_ext/name_error_test.rb b/activesupport/test/core_ext/name_error_test.rb
index a99b20602d..fdb9493d3c 100644
--- a/activesupport/test/core_ext/name_error_test.rb
+++ b/activesupport/test/core_ext/name_error_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/name_error"
 
diff --git a/activesupport/test/core_ext/numeric_ext_test.rb b/activesupport/test/core_ext/numeric_ext_test.rb
index d4e03a90a4..3cfbe6e7e6 100644
--- a/activesupport/test/core_ext/numeric_ext_test.rb
+++ b/activesupport/test/core_ext/numeric_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "active_support/core_ext/numeric"
diff --git a/activesupport/test/core_ext/object/acts_like_test.rb b/activesupport/test/core_ext/object/acts_like_test.rb
index 1f1b71f748..631f4e63a8 100644
--- a/activesupport/test/core_ext/object/acts_like_test.rb
+++ b/activesupport/test/core_ext/object/acts_like_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object"
 
diff --git a/activesupport/test/core_ext/object/blank_test.rb b/activesupport/test/core_ext/object/blank_test.rb
index fbd96893f6..7fd3fed042 100644
--- a/activesupport/test/core_ext/object/blank_test.rb
+++ b/activesupport/test/core_ext/object/blank_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/blank"
 
diff --git a/activesupport/test/core_ext/object/deep_dup_test.rb b/activesupport/test/core_ext/object/deep_dup_test.rb
index d6f0a71c5b..f247ee16de 100644
--- a/activesupport/test/core_ext/object/deep_dup_test.rb
+++ b/activesupport/test/core_ext/object/deep_dup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object"
 
diff --git a/activesupport/test/core_ext/object/duplicable_test.rb b/activesupport/test/core_ext/object/duplicable_test.rb
index 7607e98b0c..68b0129980 100644
--- a/activesupport/test/core_ext/object/duplicable_test.rb
+++ b/activesupport/test/core_ext/object/duplicable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "bigdecimal"
 require "active_support/core_ext/object/duplicable"
diff --git a/activesupport/test/core_ext/object/inclusion_test.rb b/activesupport/test/core_ext/object/inclusion_test.rb
index b706e6b90f..955686d6aa 100644
--- a/activesupport/test/core_ext/object/inclusion_test.rb
+++ b/activesupport/test/core_ext/object/inclusion_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/inclusion"
 
diff --git a/activesupport/test/core_ext/object/instance_variables_test.rb b/activesupport/test/core_ext/object/instance_variables_test.rb
index df38282fb0..5bdb2fbc35 100644
--- a/activesupport/test/core_ext/object/instance_variables_test.rb
+++ b/activesupport/test/core_ext/object/instance_variables_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object"
 
diff --git a/activesupport/test/core_ext/object/json_cherry_pick_test.rb b/activesupport/test/core_ext/object/json_cherry_pick_test.rb
index 9f3f92a74b..dd4e90918e 100644
--- a/activesupport/test/core_ext/object/json_cherry_pick_test.rb
+++ b/activesupport/test/core_ext/object/json_cherry_pick_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 # These test cases were added to test that cherry-picking the json extensions
diff --git a/activesupport/test/core_ext/object/json_gem_encoding_test.rb b/activesupport/test/core_ext/object/json_gem_encoding_test.rb
index 3ff34e448e..f5016d0c2a 100644
--- a/activesupport/test/core_ext/object/json_gem_encoding_test.rb
+++ b/activesupport/test/core_ext/object/json_gem_encoding_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "json"
 require "json/encoding_test_cases"
diff --git a/activesupport/test/core_ext/object/to_param_test.rb b/activesupport/test/core_ext/object/to_param_test.rb
index e446092abe..56246b24f3 100644
--- a/activesupport/test/core_ext/object/to_param_test.rb
+++ b/activesupport/test/core_ext/object/to_param_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/to_param"
 
diff --git a/activesupport/test/core_ext/object/to_query_test.rb b/activesupport/test/core_ext/object/to_query_test.rb
index 44147d47cf..298c8bf373 100644
--- a/activesupport/test/core_ext/object/to_query_test.rb
+++ b/activesupport/test/core_ext/object/to_query_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/ordered_hash"
 require "active_support/core_ext/object/to_query"
diff --git a/activesupport/test/core_ext/object/try_test.rb b/activesupport/test/core_ext/object/try_test.rb
index fe437f6260..5c8bf59952 100644
--- a/activesupport/test/core_ext/object/try_test.rb
+++ b/activesupport/test/core_ext/object/try_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object"
 
diff --git a/activesupport/test/core_ext/range_ext_test.rb b/activesupport/test/core_ext/range_ext_test.rb
index 693de2755d..d166c7309c 100644
--- a/activesupport/test/core_ext/range_ext_test.rb
+++ b/activesupport/test/core_ext/range_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "active_support/core_ext/numeric"
diff --git a/activesupport/test/core_ext/regexp_ext_test.rb b/activesupport/test/core_ext/regexp_ext_test.rb
index c937dad1db..e569a9f234 100644
--- a/activesupport/test/core_ext/regexp_ext_test.rb
+++ b/activesupport/test/core_ext/regexp_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/regexp"
 
diff --git a/activesupport/test/core_ext/secure_random_test.rb b/activesupport/test/core_ext/secure_random_test.rb
index b2ac4640ab..fc25f6ab41 100644
--- a/activesupport/test/core_ext/secure_random_test.rb
+++ b/activesupport/test/core_ext/secure_random_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/securerandom"
 
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index defec8bba0..daa8c3f2ef 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "date"
 require "abstract_unit"
 require "timeout"
diff --git a/activesupport/test/core_ext/time_ext_test.rb b/activesupport/test/core_ext/time_ext_test.rb
index f1c6fa4f8c..625a5bffb8 100644
--- a/activesupport/test/core_ext/time_ext_test.rb
+++ b/activesupport/test/core_ext/time_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "core_ext/date_and_time_behavior"
diff --git a/activesupport/test/core_ext/time_with_zone_test.rb b/activesupport/test/core_ext/time_with_zone_test.rb
index 9401b9be07..70ae793cda 100644
--- a/activesupport/test/core_ext/time_with_zone_test.rb
+++ b/activesupport/test/core_ext/time_with_zone_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "time_zone_test_helpers"
diff --git a/activesupport/test/core_ext/uri_ext_test.rb b/activesupport/test/core_ext/uri_ext_test.rb
index 555716d1c3..0f13ca9c0e 100644
--- a/activesupport/test/core_ext/uri_ext_test.rb
+++ b/activesupport/test/core_ext/uri_ext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "uri"
 require "active_support/core_ext/uri"
diff --git a/activesupport/test/current_attributes_test.rb b/activesupport/test/current_attributes_test.rb
index f195787135..67ef6ef619 100644
--- a/activesupport/test/current_attributes_test.rb
+++ b/activesupport/test/current_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class CurrentAttributesTest < ActiveSupport::TestCase
diff --git a/activesupport/test/dependencies/check_warnings.rb b/activesupport/test/dependencies/check_warnings.rb
index d177dce295..03c3dca1d6 100644
--- a/activesupport/test/dependencies/check_warnings.rb
+++ b/activesupport/test/dependencies/check_warnings.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 $check_warnings_load_count += 1
 $checked_verbose = $VERBOSE
diff --git a/activesupport/test/dependencies/conflict.rb b/activesupport/test/dependencies/conflict.rb
index a7199a093b..7eff49bbfa 100644
--- a/activesupport/test/dependencies/conflict.rb
+++ b/activesupport/test/dependencies/conflict.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 Conflict = 1
diff --git a/activesupport/test/dependencies/cross_site_depender.rb b/activesupport/test/dependencies/cross_site_depender.rb
index b414058e27..fbc3b64f56 100644
--- a/activesupport/test/dependencies/cross_site_depender.rb
+++ b/activesupport/test/dependencies/cross_site_depender.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CrossSiteDepender
   CrossSiteDependency
 end
diff --git a/activesupport/test/dependencies/mutual_one.rb b/activesupport/test/dependencies/mutual_one.rb
index f739ce2744..05f08f82d3 100644
--- a/activesupport/test/dependencies/mutual_one.rb
+++ b/activesupport/test/dependencies/mutual_one.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $mutual_dependencies_count += 1
 require_dependency "mutual_two"
 require_dependency "mutual_two.rb"
diff --git a/activesupport/test/dependencies/mutual_two.rb b/activesupport/test/dependencies/mutual_two.rb
index 30034be6d1..1d87d334af 100644
--- a/activesupport/test/dependencies/mutual_two.rb
+++ b/activesupport/test/dependencies/mutual_two.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $mutual_dependencies_count += 1
 require_dependency "mutual_one.rb"
 require_dependency "mutual_one"
diff --git a/activesupport/test/dependencies/raises_exception.rb b/activesupport/test/dependencies/raises_exception.rb
index ce9050e572..0a56680fe3 100644
--- a/activesupport/test/dependencies/raises_exception.rb
+++ b/activesupport/test/dependencies/raises_exception.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $raises_exception_load_count += 1
 raise Exception, "Loading me failed, so do not add to loaded or history."
 $raises_exception_load_count += 1
diff --git a/activesupport/test/dependencies/raises_exception_without_blame_file.rb b/activesupport/test/dependencies/raises_exception_without_blame_file.rb
index 7fb2a5c8bc..7c3856b1e6 100644
--- a/activesupport/test/dependencies/raises_exception_without_blame_file.rb
+++ b/activesupport/test/dependencies/raises_exception_without_blame_file.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 exception = Exception.new("I am not blamable!")
 class << exception
   undef_method(:blame_file!)
diff --git a/activesupport/test/dependencies/requires_nonexistent0.rb b/activesupport/test/dependencies/requires_nonexistent0.rb
index 86a66203f8..7f8a0d8419 100644
--- a/activesupport/test/dependencies/requires_nonexistent0.rb
+++ b/activesupport/test/dependencies/requires_nonexistent0.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 require "RMagickDontExistDude"
diff --git a/activesupport/test/dependencies/requires_nonexistent1.rb b/activesupport/test/dependencies/requires_nonexistent1.rb
index a3ec7ce4ef..0055177d67 100644
--- a/activesupport/test/dependencies/requires_nonexistent1.rb
+++ b/activesupport/test/dependencies/requires_nonexistent1.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 require_dependency "requires_nonexistent0"
diff --git a/activesupport/test/dependencies/service_one.rb b/activesupport/test/dependencies/service_one.rb
index 6149297741..afc3042269 100644
--- a/activesupport/test/dependencies/service_one.rb
+++ b/activesupport/test/dependencies/service_one.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $loaded_service_one ||= 0
 $loaded_service_one += 1
 
diff --git a/activesupport/test/dependencies/service_two.rb b/activesupport/test/dependencies/service_two.rb
index 4c013f1fe3..aabfc3c553 100644
--- a/activesupport/test/dependencies/service_two.rb
+++ b/activesupport/test/dependencies/service_two.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class ServiceTwo
 end
diff --git a/activesupport/test/dependencies_test.rb b/activesupport/test/dependencies_test.rb
index 1aad7fc0ec..1ea36418ff 100644
--- a/activesupport/test/dependencies_test.rb
+++ b/activesupport/test/dependencies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "pp"
 require "active_support/dependencies"
diff --git a/activesupport/test/dependencies_test_helpers.rb b/activesupport/test/dependencies_test_helpers.rb
index 9ba8f3b9b5..451195a143 100644
--- a/activesupport/test/dependencies_test_helpers.rb
+++ b/activesupport/test/dependencies_test_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module DependenciesTestHelpers
   def with_loading(*from)
     old_mechanism, ActiveSupport::Dependencies.mechanism = ActiveSupport::Dependencies.mechanism, :load
diff --git a/activesupport/test/deprecation/method_wrappers_test.rb b/activesupport/test/deprecation/method_wrappers_test.rb
index 33ce4aaeca..85d057bb02 100644
--- a/activesupport/test/deprecation/method_wrappers_test.rb
+++ b/activesupport/test/deprecation/method_wrappers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/deprecation"
 
diff --git a/activesupport/test/deprecation/proxy_wrappers_test.rb b/activesupport/test/deprecation/proxy_wrappers_test.rb
index ff38a8165d..67afd75c44 100644
--- a/activesupport/test/deprecation/proxy_wrappers_test.rb
+++ b/activesupport/test/deprecation/proxy_wrappers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/deprecation"
 
diff --git a/activesupport/test/deprecation_test.rb b/activesupport/test/deprecation_test.rb
index 22e0ef9afc..257cb50fb2 100644
--- a/activesupport/test/deprecation_test.rb
+++ b/activesupport/test/deprecation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/testing/stream"
 
diff --git a/activesupport/test/descendants_tracker_test_cases.rb b/activesupport/test/descendants_tracker_test_cases.rb
index abae3f5880..cf349d53ee 100644
--- a/activesupport/test/descendants_tracker_test_cases.rb
+++ b/activesupport/test/descendants_tracker_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 
 module DescendantsTrackerTestCases
diff --git a/activesupport/test/descendants_tracker_with_autoloading_test.rb b/activesupport/test/descendants_tracker_with_autoloading_test.rb
index 021093956f..e202667a8a 100644
--- a/activesupport/test/descendants_tracker_with_autoloading_test.rb
+++ b/activesupport/test/descendants_tracker_with_autoloading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/descendants_tracker"
 require "active_support/dependencies"
diff --git a/activesupport/test/descendants_tracker_without_autoloading_test.rb b/activesupport/test/descendants_tracker_without_autoloading_test.rb
index cadd21be92..72adc30ace 100644
--- a/activesupport/test/descendants_tracker_without_autoloading_test.rb
+++ b/activesupport/test/descendants_tracker_without_autoloading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/descendants_tracker"
 require "descendants_tracker_test_cases"
diff --git a/activesupport/test/evented_file_update_checker_test.rb b/activesupport/test/evented_file_update_checker_test.rb
index 9450bcb814..f33a5f5764 100644
--- a/activesupport/test/evented_file_update_checker_test.rb
+++ b/activesupport/test/evented_file_update_checker_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "pathname"
 require "file_update_checker_shared_tests"
diff --git a/activesupport/test/executor_test.rb b/activesupport/test/executor_test.rb
index c522ea9b52..7fefc066b3 100644
--- a/activesupport/test/executor_test.rb
+++ b/activesupport/test/executor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ExecutorTest < ActiveSupport::TestCase
diff --git a/activesupport/test/file_update_checker_shared_tests.rb b/activesupport/test/file_update_checker_shared_tests.rb
index 90ef886b08..361e7e2349 100644
--- a/activesupport/test/file_update_checker_shared_tests.rb
+++ b/activesupport/test/file_update_checker_shared_tests.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 
 module FileUpdateCheckerSharedTests
diff --git a/activesupport/test/file_update_checker_test.rb b/activesupport/test/file_update_checker_test.rb
index 5a4e3bebf2..55b0b46644 100644
--- a/activesupport/test/file_update_checker_test.rb
+++ b/activesupport/test/file_update_checker_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "file_update_checker_shared_tests"
 
diff --git a/activesupport/test/fixtures/autoload/another_class.rb b/activesupport/test/fixtures/autoload/another_class.rb
index f61698823c..ab6e075ab4 100644
--- a/activesupport/test/fixtures/autoload/another_class.rb
+++ b/activesupport/test/fixtures/autoload/another_class.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Fixtures::AnotherClass
 end
diff --git a/activesupport/test/fixtures/autoload/some_class.rb b/activesupport/test/fixtures/autoload/some_class.rb
index a3b5f831ad..30d41eb0bf 100644
--- a/activesupport/test/fixtures/autoload/some_class.rb
+++ b/activesupport/test/fixtures/autoload/some_class.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class Fixtures::Autoload::SomeClass
 end
diff --git a/activesupport/test/gzip_test.rb b/activesupport/test/gzip_test.rb
index 592578fedd..33e0cd2a04 100644
--- a/activesupport/test/gzip_test.rb
+++ b/activesupport/test/gzip_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/blank"
 
diff --git a/activesupport/test/hash_with_indifferent_access_test.rb b/activesupport/test/hash_with_indifferent_access_test.rb
index b71839a5a2..d68add46cd 100644
--- a/activesupport/test/hash_with_indifferent_access_test.rb
+++ b/activesupport/test/hash_with_indifferent_access_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash"
 require "bigdecimal"
diff --git a/activesupport/test/i18n_test.rb b/activesupport/test/i18n_test.rb
index 58ccbdf108..7d88d2dc6b 100644
--- a/activesupport/test/i18n_test.rb
+++ b/activesupport/test/i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "active_support/core_ext/array/conversions"
diff --git a/activesupport/test/inflector_test.rb b/activesupport/test/inflector_test.rb
index b22054ebee..ef956eda90 100644
--- a/activesupport/test/inflector_test.rb
+++ b/activesupport/test/inflector_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/inflector"
 
diff --git a/activesupport/test/inflector_test_cases.rb b/activesupport/test/inflector_test_cases.rb
index 9b0d2867c2..d61ca3fc18 100644
--- a/activesupport/test/inflector_test_cases.rb
+++ b/activesupport/test/inflector_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module InflectorTestCases
   SingularToPlural = {
     "search"      => "searches",
diff --git a/activesupport/test/json/decoding_test.rb b/activesupport/test/json/decoding_test.rb
index 52687a003f..6f5051c312 100644
--- a/activesupport/test/json/decoding_test.rb
+++ b/activesupport/test/json/decoding_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json"
 require "active_support/time"
diff --git a/activesupport/test/json/encoding_test.rb b/activesupport/test/json/encoding_test.rb
index 314c11b2fc..6d8f7cfbd0 100644
--- a/activesupport/test/json/encoding_test.rb
+++ b/activesupport/test/json/encoding_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "securerandom"
 require "abstract_unit"
 require "active_support/core_ext/string/inflections"
diff --git a/activesupport/test/json/encoding_test_cases.rb b/activesupport/test/json/encoding_test_cases.rb
index 2b64aa624d..7e4775cec8 100644
--- a/activesupport/test/json/encoding_test_cases.rb
+++ b/activesupport/test/json/encoding_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "bigdecimal"
 require "date"
 require "time"
diff --git a/activesupport/test/key_generator_test.rb b/activesupport/test/key_generator_test.rb
index ae7018274a..89db9563ac 100644
--- a/activesupport/test/key_generator_test.rb
+++ b/activesupport/test/key_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 begin
diff --git a/activesupport/test/lazy_load_hooks_test.rb b/activesupport/test/lazy_load_hooks_test.rb
index 761fe46094..3b1959a1c9 100644
--- a/activesupport/test/lazy_load_hooks_test.rb
+++ b/activesupport/test/lazy_load_hooks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class LazyLoadHooksTest < ActiveSupport::TestCase
diff --git a/activesupport/test/log_subscriber_test.rb b/activesupport/test/log_subscriber_test.rb
index f30932452f..f6496ef7d6 100644
--- a/activesupport/test/log_subscriber_test.rb
+++ b/activesupport/test/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 
diff --git a/activesupport/test/logger_test.rb b/activesupport/test/logger_test.rb
index cd0ddb4b97..1bc443ae65 100644
--- a/activesupport/test/logger_test.rb
+++ b/activesupport/test/logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "multibyte_test_helpers"
 require "stringio"
diff --git a/activesupport/test/message_encryptor_test.rb b/activesupport/test/message_encryptor_test.rb
index 33ab7620da..4c3515b5e1 100644
--- a/activesupport/test/message_encryptor_test.rb
+++ b/activesupport/test/message_encryptor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "openssl"
 require "active_support/time"
diff --git a/activesupport/test/message_verifier_test.rb b/activesupport/test/message_verifier_test.rb
index d2964aeb7e..d6109c761d 100644
--- a/activesupport/test/message_verifier_test.rb
+++ b/activesupport/test/message_verifier_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "openssl"
 require "active_support/time"
diff --git a/activesupport/test/multibyte_chars_test.rb b/activesupport/test/multibyte_chars_test.rb
index 6bef794fe2..16a7d488c7 100644
--- a/activesupport/test/multibyte_chars_test.rb
+++ b/activesupport/test/multibyte_chars_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "multibyte_test_helpers"
 require "active_support/core_ext/string/multibyte"
diff --git a/activesupport/test/multibyte_conformance_test.rb b/activesupport/test/multibyte_conformance_test.rb
index be89c85c79..ef1a26135f 100644
--- a/activesupport/test/multibyte_conformance_test.rb
+++ b/activesupport/test/multibyte_conformance_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "multibyte_test_helpers"
 
diff --git a/activesupport/test/multibyte_grapheme_break_conformance_test.rb b/activesupport/test/multibyte_grapheme_break_conformance_test.rb
index 855626e779..b3328987ae 100644
--- a/activesupport/test/multibyte_grapheme_break_conformance_test.rb
+++ b/activesupport/test/multibyte_grapheme_break_conformance_test.rb
@@ -1,5 +1,4 @@
 # encoding: utf-8
-# frozen_string_literal: true
 
 require "abstract_unit"
 require "multibyte_test_helpers"
diff --git a/activesupport/test/multibyte_normalization_conformance_test.rb b/activesupport/test/multibyte_normalization_conformance_test.rb
index deb94a7aa3..ebc9f92d23 100644
--- a/activesupport/test/multibyte_normalization_conformance_test.rb
+++ b/activesupport/test/multibyte_normalization_conformance_test.rb
@@ -1,5 +1,4 @@
 # encoding: utf-8
-# frozen_string_literal: true
 
 require "abstract_unit"
 require "multibyte_test_helpers"
diff --git a/activesupport/test/multibyte_proxy_test.rb b/activesupport/test/multibyte_proxy_test.rb
index 27d5cea836..c303097f80 100644
--- a/activesupport/test/multibyte_proxy_test.rb
+++ b/activesupport/test/multibyte_proxy_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MultibyteProxyText < ActiveSupport::TestCase
diff --git a/activesupport/test/multibyte_test_helpers.rb b/activesupport/test/multibyte_test_helpers.rb
index c3346c233a..e1e0ae86d9 100644
--- a/activesupport/test/multibyte_test_helpers.rb
+++ b/activesupport/test/multibyte_test_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module MultibyteTestHelpers
   class Downloader
     def self.download(from, to)
diff --git a/activesupport/test/multibyte_unicode_database_test.rb b/activesupport/test/multibyte_unicode_database_test.rb
index 0defa6dc54..3724782930 100644
--- a/activesupport/test/multibyte_unicode_database_test.rb
+++ b/activesupport/test/multibyte_unicode_database_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class MultibyteUnicodeDatabaseTest < ActiveSupport::TestCase
diff --git a/activesupport/test/notifications/evented_notification_test.rb b/activesupport/test/notifications/evented_notification_test.rb
index 1fd50d540b..24c5befec3 100644
--- a/activesupport/test/notifications/evented_notification_test.rb
+++ b/activesupport/test/notifications/evented_notification_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActiveSupport
diff --git a/activesupport/test/notifications/instrumenter_test.rb b/activesupport/test/notifications/instrumenter_test.rb
index 122afa1cae..7eacc5cbe7 100644
--- a/activesupport/test/notifications/instrumenter_test.rb
+++ b/activesupport/test/notifications/instrumenter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/notifications/instrumenter"
 
diff --git a/activesupport/test/notifications_test.rb b/activesupport/test/notifications_test.rb
index d92c059f36..11f743519f 100644
--- a/activesupport/test/notifications_test.rb
+++ b/activesupport/test/notifications_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/delegation"
 
diff --git a/activesupport/test/number_helper_i18n_test.rb b/activesupport/test/number_helper_i18n_test.rb
index b5ac343390..a1d1c41dc2 100644
--- a/activesupport/test/number_helper_i18n_test.rb
+++ b/activesupport/test/number_helper_i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/number_helper"
 require "active_support/core_ext/hash/keys"
diff --git a/activesupport/test/number_helper_test.rb b/activesupport/test/number_helper_test.rb
index db99ba649f..4caf1428ea 100644
--- a/activesupport/test/number_helper_test.rb
+++ b/activesupport/test/number_helper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/number_helper"
 require "active_support/core_ext/string/output_safety"
diff --git a/activesupport/test/option_merger_test.rb b/activesupport/test/option_merger_test.rb
index 90291d6ea8..c5a6d304ee 100644
--- a/activesupport/test/option_merger_test.rb
+++ b/activesupport/test/option_merger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/with_options"
 
diff --git a/activesupport/test/ordered_hash_test.rb b/activesupport/test/ordered_hash_test.rb
index 5d7b83d7a2..2cefab3832 100644
--- a/activesupport/test/ordered_hash_test.rb
+++ b/activesupport/test/ordered_hash_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json"
 require "active_support/core_ext/object/json"
diff --git a/activesupport/test/ordered_options_test.rb b/activesupport/test/ordered_options_test.rb
index 7ff8e01540..0417911289 100644
--- a/activesupport/test/ordered_options_test.rb
+++ b/activesupport/test/ordered_options_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/ordered_options"
 
diff --git a/activesupport/test/reloader_test.rb b/activesupport/test/reloader_test.rb
index 8dafbff04c..bdd80307c7 100644
--- a/activesupport/test/reloader_test.rb
+++ b/activesupport/test/reloader_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class ReloaderTest < ActiveSupport::TestCase
diff --git a/activesupport/test/rescuable_test.rb b/activesupport/test/rescuable_test.rb
index 96ed3718af..3bdd1651e7 100644
--- a/activesupport/test/rescuable_test.rb
+++ b/activesupport/test/rescuable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class WraithAttack < StandardError
diff --git a/activesupport/test/safe_buffer_test.rb b/activesupport/test/safe_buffer_test.rb
index 5a0f6539a4..36c068b91f 100644
--- a/activesupport/test/safe_buffer_test.rb
+++ b/activesupport/test/safe_buffer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/string/inflections"
 require "yaml"
diff --git a/activesupport/test/security_utils_test.rb b/activesupport/test/security_utils_test.rb
index 34f2eea919..e8f762da22 100644
--- a/activesupport/test/security_utils_test.rb
+++ b/activesupport/test/security_utils_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/security_utils"
 
diff --git a/activesupport/test/share_lock_test.rb b/activesupport/test/share_lock_test.rb
index 7d850b4757..a5970591fa 100644
--- a/activesupport/test/share_lock_test.rb
+++ b/activesupport/test/share_lock_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "concurrent/atomic/count_down_latch"
 require "active_support/concurrency/share_lock"
diff --git a/activesupport/test/string_inquirer_test.rb b/activesupport/test/string_inquirer_test.rb
index ba9791886d..79a715349c 100644
--- a/activesupport/test/string_inquirer_test.rb
+++ b/activesupport/test/string_inquirer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class StringInquirerTest < ActiveSupport::TestCase
diff --git a/activesupport/test/subscriber_test.rb b/activesupport/test/subscriber_test.rb
index 33f89d237e..9127da35d4 100644
--- a/activesupport/test/subscriber_test.rb
+++ b/activesupport/test/subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/subscriber"
 
diff --git a/activesupport/test/tagged_logging_test.rb b/activesupport/test/tagged_logging_test.rb
index e35ddba74b..2469e827d4 100644
--- a/activesupport/test/tagged_logging_test.rb
+++ b/activesupport/test/tagged_logging_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/logger"
 require "active_support/tagged_logging"
diff --git a/activesupport/test/test_case_test.rb b/activesupport/test/test_case_test.rb
index bc83fc3f07..40dfbe2542 100644
--- a/activesupport/test/test_case_test.rb
+++ b/activesupport/test/test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class AssertDifferenceTest < ActiveSupport::TestCase
diff --git a/activesupport/test/testing/constant_lookup_test.rb b/activesupport/test/testing/constant_lookup_test.rb
index 02ef708a63..00e69fcdb5 100644
--- a/activesupport/test/testing/constant_lookup_test.rb
+++ b/activesupport/test/testing/constant_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "dependencies_test_helpers"
 
diff --git a/activesupport/test/testing/file_fixtures_test.rb b/activesupport/test/testing/file_fixtures_test.rb
index cc00e7f113..9f28252c31 100644
--- a/activesupport/test/testing/file_fixtures_test.rb
+++ b/activesupport/test/testing/file_fixtures_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 require "pathname"
diff --git a/activesupport/test/testing/method_call_assertions_test.rb b/activesupport/test/testing/method_call_assertions_test.rb
index 3912c19b80..7887933b15 100644
--- a/activesupport/test/testing/method_call_assertions_test.rb
+++ b/activesupport/test/testing/method_call_assertions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/testing/method_call_assertions"
 
diff --git a/activesupport/test/time_travel_test.rb b/activesupport/test/time_travel_test.rb
index 616015b74e..9d354f14f4 100644
--- a/activesupport/test/time_travel_test.rb
+++ b/activesupport/test/time_travel_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/date_time"
 require "active_support/core_ext/numeric/time"
diff --git a/activesupport/test/time_zone_test.rb b/activesupport/test/time_zone_test.rb
index f1a1e44a8f..de111cc40e 100644
--- a/activesupport/test/time_zone_test.rb
+++ b/activesupport/test/time_zone_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/time"
 require "time_zone_test_helpers"
diff --git a/activesupport/test/time_zone_test_helpers.rb b/activesupport/test/time_zone_test_helpers.rb
index 118dc38b5c..e1d615d154 100644
--- a/activesupport/test/time_zone_test_helpers.rb
+++ b/activesupport/test/time_zone_test_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module TimeZoneTestHelpers
   def with_tz_default(tz = nil)
     old_tz = Time.zone
diff --git a/activesupport/test/transliterate_test.rb b/activesupport/test/transliterate_test.rb
index 1359fe8a8d..466b69bcef 100644
--- a/activesupport/test/transliterate_test.rb
+++ b/activesupport/test/transliterate_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/inflector/transliterate"
 
diff --git a/activesupport/test/xml_mini/jdom_engine_test.rb b/activesupport/test/xml_mini/jdom_engine_test.rb
index ae78a0e547..fc35ac113b 100644
--- a/activesupport/test/xml_mini/jdom_engine_test.rb
+++ b/activesupport/test/xml_mini/jdom_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 XMLMiniEngineTest.run_with_platform("java") do
diff --git a/activesupport/test/xml_mini/libxml_engine_test.rb b/activesupport/test/xml_mini/libxml_engine_test.rb
index 64ef5b61a1..f3394ad7f2 100644
--- a/activesupport/test/xml_mini/libxml_engine_test.rb
+++ b/activesupport/test/xml_mini/libxml_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 XMLMiniEngineTest.run_with_gem("libxml") do
diff --git a/activesupport/test/xml_mini/libxmlsax_engine_test.rb b/activesupport/test/xml_mini/libxmlsax_engine_test.rb
index deeb01eefe..f457e160d6 100644
--- a/activesupport/test/xml_mini/libxmlsax_engine_test.rb
+++ b/activesupport/test/xml_mini/libxmlsax_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 XMLMiniEngineTest.run_with_gem("libxml") do
diff --git a/activesupport/test/xml_mini/nokogiri_engine_test.rb b/activesupport/test/xml_mini/nokogiri_engine_test.rb
index 10062577f6..3151e75fc0 100644
--- a/activesupport/test/xml_mini/nokogiri_engine_test.rb
+++ b/activesupport/test/xml_mini/nokogiri_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 XMLMiniEngineTest.run_with_gem("nokogiri") do
diff --git a/activesupport/test/xml_mini/nokogirisax_engine_test.rb b/activesupport/test/xml_mini/nokogirisax_engine_test.rb
index 9d298b77d3..7dafbdaf48 100644
--- a/activesupport/test/xml_mini/nokogirisax_engine_test.rb
+++ b/activesupport/test/xml_mini/nokogirisax_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 XMLMiniEngineTest.run_with_gem("nokogiri") do
diff --git a/activesupport/test/xml_mini/rexml_engine_test.rb b/activesupport/test/xml_mini/rexml_engine_test.rb
index 29a9dbfbeb..c51f0d3c20 100644
--- a/activesupport/test/xml_mini/rexml_engine_test.rb
+++ b/activesupport/test/xml_mini/rexml_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "xml_mini_engine_test"
 
 class REXMLEngineTest < XMLMiniEngineTest
diff --git a/activesupport/test/xml_mini/xml_mini_engine_test.rb b/activesupport/test/xml_mini/xml_mini_engine_test.rb
index 6e6be2ff0a..244e0b0d3a 100644
--- a/activesupport/test/xml_mini/xml_mini_engine_test.rb
+++ b/activesupport/test/xml_mini/xml_mini_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/xml_mini"
 require "active_support/core_ext/hash/conversions"
diff --git a/activesupport/test/xml_mini_test.rb b/activesupport/test/xml_mini_test.rb
index cf66e9ff41..b8caa1d74c 100644
--- a/activesupport/test/xml_mini_test.rb
+++ b/activesupport/test/xml_mini_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/xml_mini"
 require "active_support/builder"
diff --git a/ci/travis.rb b/ci/travis.rb
index 6e64adcd88..bb87c8f4ad 100755
--- a/ci/travis.rb
+++ b/ci/travis.rb
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 require "fileutils"
 include FileUtils
 
diff --git a/guides/Rakefile b/guides/Rakefile
index 653255a6b5..3a6f10040f 100644
--- a/guides/Rakefile
+++ b/guides/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :guides do
   desc 'Generate guides (for authors), use ONLY=foo to process just "foo.md"'
   task generate: "generate:html"
diff --git a/guides/bug_report_templates/action_controller_gem.rb b/guides/bug_report_templates/action_controller_gem.rb
index 49fe6c61c2..8b7aa893fd 100644
--- a/guides/bug_report_templates/action_controller_gem.rb
+++ b/guides/bug_report_templates/action_controller_gem.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/action_controller_master.rb b/guides/bug_report_templates/action_controller_master.rb
index 1aca491f03..3dd66c95ec 100644
--- a/guides/bug_report_templates/action_controller_master.rb
+++ b/guides/bug_report_templates/action_controller_master.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_job_gem.rb b/guides/bug_report_templates/active_job_gem.rb
index 7184e47df7..252b270a0c 100644
--- a/guides/bug_report_templates/active_job_gem.rb
+++ b/guides/bug_report_templates/active_job_gem.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_job_master.rb b/guides/bug_report_templates/active_job_master.rb
index 75b15958dc..7591470440 100644
--- a/guides/bug_report_templates/active_job_master.rb
+++ b/guides/bug_report_templates/active_job_master.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_record_gem.rb b/guides/bug_report_templates/active_record_gem.rb
index e5d1ff24f6..61d4e8d395 100644
--- a/guides/bug_report_templates/active_record_gem.rb
+++ b/guides/bug_report_templates/active_record_gem.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_record_master.rb b/guides/bug_report_templates/active_record_master.rb
index 66f923e52a..8bbc1ef19e 100644
--- a/guides/bug_report_templates/active_record_master.rb
+++ b/guides/bug_report_templates/active_record_master.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_record_migrations_gem.rb b/guides/bug_report_templates/active_record_migrations_gem.rb
index 2d7b3ef05e..00ba3c1cd6 100644
--- a/guides/bug_report_templates/active_record_migrations_gem.rb
+++ b/guides/bug_report_templates/active_record_migrations_gem.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/active_record_migrations_master.rb b/guides/bug_report_templates/active_record_migrations_master.rb
index 363360828d..52c9028b0f 100644
--- a/guides/bug_report_templates/active_record_migrations_master.rb
+++ b/guides/bug_report_templates/active_record_migrations_master.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/benchmark.rb b/guides/bug_report_templates/benchmark.rb
index 91466f56e0..54433b34dd 100644
--- a/guides/bug_report_templates/benchmark.rb
+++ b/guides/bug_report_templates/benchmark.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/generic_gem.rb b/guides/bug_report_templates/generic_gem.rb
index d22af83e25..4dcd04ea27 100644
--- a/guides/bug_report_templates/generic_gem.rb
+++ b/guides/bug_report_templates/generic_gem.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/bug_report_templates/generic_master.rb b/guides/bug_report_templates/generic_master.rb
index 168b639843..ed45726e92 100644
--- a/guides/bug_report_templates/generic_master.rb
+++ b/guides/bug_report_templates/generic_master.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "bundler/inline"
 rescue LoadError => e
diff --git a/guides/rails_guides.rb b/guides/rails_guides.rb
index 52e66d5324..0f611c8f2b 100644
--- a/guides/rails_guides.rb
+++ b/guides/rails_guides.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $:.unshift __dir__
 
 as_lib = File.expand_path("../activesupport/lib", __dir__)
diff --git a/guides/rails_guides/generator.rb b/guides/rails_guides/generator.rb
index 04ab89093a..35f014747c 100644
--- a/guides/rails_guides/generator.rb
+++ b/guides/rails_guides/generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "set"
 require "fileutils"
 
diff --git a/guides/rails_guides/helpers.rb b/guides/rails_guides/helpers.rb
index f68e1f597f..520aa7f7cc 100644
--- a/guides/rails_guides/helpers.rb
+++ b/guides/rails_guides/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 
 module RailsGuides
diff --git a/guides/rails_guides/indexer.rb b/guides/rails_guides/indexer.rb
index 63dbfd5e2c..c58b6b85a2 100644
--- a/guides/rails_guides/indexer.rb
+++ b/guides/rails_guides/indexer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/blank"
 require "active_support/core_ext/string/inflections"
 
diff --git a/guides/rails_guides/kindle.rb b/guides/rails_guides/kindle.rb
index 87a369a15a..9536d0bd3b 100644
--- a/guides/rails_guides/kindle.rb
+++ b/guides/rails_guides/kindle.rb
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 require "kindlerb"
 require "nokogiri"
diff --git a/guides/rails_guides/levenshtein.rb b/guides/rails_guides/levenshtein.rb
index 90bb40dfc2..40c6a5c372 100644
--- a/guides/rails_guides/levenshtein.rb
+++ b/guides/rails_guides/levenshtein.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module RailsGuides
   module Levenshtein
     # This code is based directly on the Text gem implementation.
diff --git a/guides/rails_guides/markdown.rb b/guides/rails_guides/markdown.rb
index cad66b5d6d..02d58601c4 100644
--- a/guides/rails_guides/markdown.rb
+++ b/guides/rails_guides/markdown.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "redcarpet"
 require "nokogiri"
 require "rails_guides/markdown/renderer"
diff --git a/guides/rails_guides/markdown/renderer.rb b/guides/rails_guides/markdown/renderer.rb
index 583a8d348f..7ac3d417a4 100644
--- a/guides/rails_guides/markdown/renderer.rb
+++ b/guides/rails_guides/markdown/renderer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module RailsGuides
   class Markdown
     class Renderer < Redcarpet::Render::HTML
diff --git a/guides/w3c_validator.rb b/guides/w3c_validator.rb
index a97599ad3b..4671e040ca 100644
--- a/guides/w3c_validator.rb
+++ b/guides/w3c_validator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # ---------------------------------------------------------------------------
 #
 # This script validates the generated guides against the W3C Validator.
diff --git a/rails.gemspec b/rails.gemspec
index d3b4b6651e..91316f089f 100644
--- a/rails.gemspec
+++ b/rails.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/railties/Rakefile b/railties/Rakefile
index 9e251d842b..d6284b7dc5 100644
--- a/railties/Rakefile
+++ b/railties/Rakefile
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake/testtask"
 
 task default: :test
diff --git a/railties/bin/test b/railties/bin/test
index c53377cc97..470ce93f10 100755
--- a/railties/bin/test
+++ b/railties/bin/test
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/railties/exe/rails b/railties/exe/rails
index 79af4db6b6..a5635c2297 100755
--- a/railties/exe/rails
+++ b/railties/exe/rails
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 
 git_path = File.expand_path("../../.git", __dir__)
 
diff --git a/railties/lib/rails.rb b/railties/lib/rails.rb
index 168722a16f..6d8bf28943 100644
--- a/railties/lib/rails.rb
+++ b/railties/lib/rails.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/ruby_version_check"
 
 require "pathname"
diff --git a/railties/lib/rails/all.rb b/railties/lib/rails/all.rb
index d46c78dc7d..7606ea0e46 100644
--- a/railties/lib/rails/all.rb
+++ b/railties/lib/rails/all.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails"
 
 %w(
diff --git a/railties/lib/rails/api/generator.rb b/railties/lib/rails/api/generator.rb
index 27aaf1b96d..dcc491783c 100644
--- a/railties/lib/rails/api/generator.rb
+++ b/railties/lib/rails/api/generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "sdoc"
 
 class RDoc::Generator::API < RDoc::Generator::SDoc # :nodoc:
diff --git a/railties/lib/rails/api/task.rb b/railties/lib/rails/api/task.rb
index 27936d3182..49267c2329 100644
--- a/railties/lib/rails/api/task.rb
+++ b/railties/lib/rails/api/task.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rdoc/task"
 require_relative "generator"
 
diff --git a/railties/lib/rails/app_loader.rb b/railties/lib/rails/app_loader.rb
index 20e10c9c55..525d5f0161 100644
--- a/railties/lib/rails/app_loader.rb
+++ b/railties/lib/rails/app_loader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "pathname"
 require "rails/version"
 
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index b00351738e..39ca2db8e1 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/object/blank"
diff --git a/railties/lib/rails/application/bootstrap.rb b/railties/lib/rails/application/bootstrap.rb
index ea4c6014b6..dc0491035d 100644
--- a/railties/lib/rails/application/bootstrap.rb
+++ b/railties/lib/rails/application/bootstrap.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "active_support/notifications"
 require "active_support/dependencies"
diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 164fcfb282..fb635c6ae8 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/kernel/reporting"
 require "active_support/file_update_checker"
 require "rails/engine/configuration"
diff --git a/railties/lib/rails/application/default_middleware_stack.rb b/railties/lib/rails/application/default_middleware_stack.rb
index c8c13210d8..63300ffef3 100644
--- a/railties/lib/rails/application/default_middleware_stack.rb
+++ b/railties/lib/rails/application/default_middleware_stack.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   class Application
     class DefaultMiddlewareStack
diff --git a/railties/lib/rails/application/finisher.rb b/railties/lib/rails/application/finisher.rb
index 0c7598e561..c027d06663 100644
--- a/railties/lib/rails/application/finisher.rb
+++ b/railties/lib/rails/application/finisher.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   class Application
     module Finisher
diff --git a/railties/lib/rails/application/routes_reloader.rb b/railties/lib/rails/application/routes_reloader.rb
index 32dc74db43..e02ef629f2 100644
--- a/railties/lib/rails/application/routes_reloader.rb
+++ b/railties/lib/rails/application/routes_reloader.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/delegation"
 
 module Rails
diff --git a/railties/lib/rails/application_controller.rb b/railties/lib/rails/application_controller.rb
index 4ca1e7dcbd..f7d112900a 100644
--- a/railties/lib/rails/application_controller.rb
+++ b/railties/lib/rails/application_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class Rails::ApplicationController < ActionController::Base # :nodoc:
   self.view_paths = File.expand_path("templates", __dir__)
   layout "application"
diff --git a/railties/lib/rails/backtrace_cleaner.rb b/railties/lib/rails/backtrace_cleaner.rb
index abc8a93414..3bd18ebfb5 100644
--- a/railties/lib/rails/backtrace_cleaner.rb
+++ b/railties/lib/rails/backtrace_cleaner.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/backtrace_cleaner"
 
 module Rails
diff --git a/railties/lib/rails/cli.rb b/railties/lib/rails/cli.rb
index f262d2f6a1..973b746068 100644
--- a/railties/lib/rails/cli.rb
+++ b/railties/lib/rails/cli.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/app_loader"
 
 # If we are inside a Rails application this method performs an exec and thus
diff --git a/railties/lib/rails/code_statistics.rb b/railties/lib/rails/code_statistics.rb
index 50394cbd51..70dce268f1 100644
--- a/railties/lib/rails/code_statistics.rb
+++ b/railties/lib/rails/code_statistics.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/code_statistics_calculator"
 require "active_support/core_ext/enumerable"
 
diff --git a/railties/lib/rails/code_statistics_calculator.rb b/railties/lib/rails/code_statistics_calculator.rb
index 94decda164..d0194af197 100644
--- a/railties/lib/rails/code_statistics_calculator.rb
+++ b/railties/lib/rails/code_statistics_calculator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 class CodeStatisticsCalculator #:nodoc:
   attr_reader :lines, :code_lines, :classes, :methods
 
diff --git a/railties/lib/rails/command.rb b/railties/lib/rails/command.rb
index a929b660df..ee020b58f9 100644
--- a/railties/lib/rails/command.rb
+++ b/railties/lib/rails/command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "active_support/dependencies/autoload"
 require "active_support/core_ext/enumerable"
diff --git a/railties/lib/rails/command/actions.rb b/railties/lib/rails/command/actions.rb
index 90978ef59c..a00e58997c 100644
--- a/railties/lib/rails/command/actions.rb
+++ b/railties/lib/rails/command/actions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     module Actions
diff --git a/railties/lib/rails/command/base.rb b/railties/lib/rails/command/base.rb
index eed2e0a991..4f074df473 100644
--- a/railties/lib/rails/command/base.rb
+++ b/railties/lib/rails/command/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "thor"
 require "erb"
 
diff --git a/railties/lib/rails/command/behavior.rb b/railties/lib/rails/command/behavior.rb
index af93bf53ca..4a92f72f16 100644
--- a/railties/lib/rails/command/behavior.rb
+++ b/railties/lib/rails/command/behavior.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 
 module Rails
diff --git a/railties/lib/rails/command/environment_argument.rb b/railties/lib/rails/command/environment_argument.rb
index 5304132757..05eac34155 100644
--- a/railties/lib/rails/command/environment_argument.rb
+++ b/railties/lib/rails/command/environment_argument.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 
 module Rails
diff --git a/railties/lib/rails/commands.rb b/railties/lib/rails/commands.rb
index 9bdb2398c0..fff0119c65 100644
--- a/railties/lib/rails/commands.rb
+++ b/railties/lib/rails/commands.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/command"
 
 aliases = {
diff --git a/railties/lib/rails/commands/application/application_command.rb b/railties/lib/rails/commands/application/application_command.rb
index 217ac5979a..7675d3b3d1 100644
--- a/railties/lib/rails/commands/application/application_command.rb
+++ b/railties/lib/rails/commands/application/application_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 require "rails/generators/rails/app/app_generator"
 
diff --git a/railties/lib/rails/commands/console/console_command.rb b/railties/lib/rails/commands/console/console_command.rb
index 8bb88d267f..ec58540923 100644
--- a/railties/lib/rails/commands/console/console_command.rb
+++ b/railties/lib/rails/commands/console/console_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "irb"
 require "irb/completion"
 
diff --git a/railties/lib/rails/commands/dbconsole/dbconsole_command.rb b/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
index cd4de73f5c..5bfbe58d97 100644
--- a/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
+++ b/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/command/environment_argument"
 
 module Rails
diff --git a/railties/lib/rails/commands/destroy/destroy_command.rb b/railties/lib/rails/commands/destroy/destroy_command.rb
index 61ef408996..281732a936 100644
--- a/railties/lib/rails/commands/destroy/destroy_command.rb
+++ b/railties/lib/rails/commands/destroy/destroy_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 
 module Rails
diff --git a/railties/lib/rails/commands/generate/generate_command.rb b/railties/lib/rails/commands/generate/generate_command.rb
index 5e1062f0bc..9dd7ad1012 100644
--- a/railties/lib/rails/commands/generate/generate_command.rb
+++ b/railties/lib/rails/commands/generate/generate_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 
 module Rails
diff --git a/railties/lib/rails/commands/help/help_command.rb b/railties/lib/rails/commands/help/help_command.rb
index 68ca9f1c01..90d37217fc 100644
--- a/railties/lib/rails/commands/help/help_command.rb
+++ b/railties/lib/rails/commands/help/help_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class HelpCommand < Base # :nodoc:
diff --git a/railties/lib/rails/commands/new/new_command.rb b/railties/lib/rails/commands/new/new_command.rb
index 07e17a439f..207dd5d995 100644
--- a/railties/lib/rails/commands/new/new_command.rb
+++ b/railties/lib/rails/commands/new/new_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class NewCommand < Base # :nodoc:
diff --git a/railties/lib/rails/commands/plugin/plugin_command.rb b/railties/lib/rails/commands/plugin/plugin_command.rb
index b342b9bd4f..b40ab006af 100644
--- a/railties/lib/rails/commands/plugin/plugin_command.rb
+++ b/railties/lib/rails/commands/plugin/plugin_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class PluginCommand < Base # :nodoc:
diff --git a/railties/lib/rails/commands/rake/rake_command.rb b/railties/lib/rails/commands/rake/rake_command.rb
index 7e57355fe5..075b1fd23d 100644
--- a/railties/lib/rails/commands/rake/rake_command.rb
+++ b/railties/lib/rails/commands/rake/rake_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class RakeCommand < Base # :nodoc:
diff --git a/railties/lib/rails/commands/runner/runner_command.rb b/railties/lib/rails/commands/runner/runner_command.rb
index e2f41032ee..6864a9726b 100644
--- a/railties/lib/rails/commands/runner/runner_command.rb
+++ b/railties/lib/rails/commands/runner/runner_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class RunnerCommand < Base # :nodoc:
diff --git a/railties/lib/rails/commands/secrets/secrets_command.rb b/railties/lib/rails/commands/secrets/secrets_command.rb
index bdc4059c7b..5f077a5bcb 100644
--- a/railties/lib/rails/commands/secrets/secrets_command.rb
+++ b/railties/lib/rails/commands/secrets/secrets_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "rails/secrets"
 
diff --git a/railties/lib/rails/commands/server/server_command.rb b/railties/lib/rails/commands/server/server_command.rb
index a4985a0e6c..ebb4ae795a 100644
--- a/railties/lib/rails/commands/server/server_command.rb
+++ b/railties/lib/rails/commands/server/server_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "optparse"
 require "action_dispatch"
diff --git a/railties/lib/rails/commands/test/test_command.rb b/railties/lib/rails/commands/test/test_command.rb
index 6243813ff8..dce85cf12d 100644
--- a/railties/lib/rails/commands/test/test_command.rb
+++ b/railties/lib/rails/commands/test/test_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/command"
 require "rails/test_unit/minitest_plugin"
 
diff --git a/railties/lib/rails/commands/version/version_command.rb b/railties/lib/rails/commands/version/version_command.rb
index f8057ffabe..ac745594ee 100644
--- a/railties/lib/rails/commands/version/version_command.rb
+++ b/railties/lib/rails/commands/version/version_command.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Command
     class VersionCommand < Base # :nodoc:
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index 088fb6fe0d..fc7d4909f6 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/ordered_options"
 require "active_support/core_ext/object"
 require "rails/paths"
diff --git a/railties/lib/rails/console/app.rb b/railties/lib/rails/console/app.rb
index b9d349b24f..affadc8e09 100644
--- a/railties/lib/rails/console/app.rb
+++ b/railties/lib/rails/console/app.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/all"
 require "action_controller"
 
diff --git a/railties/lib/rails/console/helpers.rb b/railties/lib/rails/console/helpers.rb
index 19b6632dbc..a33f71dc5b 100644
--- a/railties/lib/rails/console/helpers.rb
+++ b/railties/lib/rails/console/helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module ConsoleMethods
     # Gets the helper methods available to the controller.
diff --git a/railties/lib/rails/dev_caching.rb b/railties/lib/rails/dev_caching.rb
index a8169e53a0..f69275a34a 100644
--- a/railties/lib/rails/dev_caching.rb
+++ b/railties/lib/rails/dev_caching.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 
 module Rails
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 6ed55aafa0..2732485c5a 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/railtie"
 require "rails/engine/railties"
 require "active_support/core_ext/module/delegation"
diff --git a/railties/lib/rails/engine/commands.rb b/railties/lib/rails/engine/commands.rb
index 493b6988a5..b9ef63243a 100644
--- a/railties/lib/rails/engine/commands.rb
+++ b/railties/lib/rails/engine/commands.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 unless defined?(APP_PATH)
   if File.exist?(File.expand_path("test/dummy/config/application.rb", ENGINE_ROOT))
     APP_PATH = File.expand_path("test/dummy/config/application", ENGINE_ROOT)
diff --git a/railties/lib/rails/engine/configuration.rb b/railties/lib/rails/engine/configuration.rb
index 40bafc4078..0c40173c38 100644
--- a/railties/lib/rails/engine/configuration.rb
+++ b/railties/lib/rails/engine/configuration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/railtie/configuration"
 
 module Rails
diff --git a/railties/lib/rails/engine/railties.rb b/railties/lib/rails/engine/railties.rb
index f34a46db89..9969a1475d 100644
--- a/railties/lib/rails/engine/railties.rb
+++ b/railties/lib/rails/engine/railties.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   class Engine < Railtie
     class Railties
diff --git a/railties/lib/rails/engine/updater.rb b/railties/lib/rails/engine/updater.rb
index 0ee72a83f0..2ecf994a5c 100644
--- a/railties/lib/rails/engine/updater.rb
+++ b/railties/lib/rails/engine/updater.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 require "rails/generators/rails/plugin/plugin_generator"
 
diff --git a/railties/lib/rails/gem_version.rb b/railties/lib/rails/gem_version.rb
index 68af9946e5..7bacf2e0ba 100644
--- a/railties/lib/rails/gem_version.rb
+++ b/railties/lib/rails/gem_version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   # Returns the version of the currently loaded Rails as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/railties/lib/rails/generators.rb b/railties/lib/rails/generators.rb
index 796d7c4af1..8f15f3a594 100644
--- a/railties/lib/rails/generators.rb
+++ b/railties/lib/rails/generators.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 activesupport_path = File.expand_path("../../../activesupport/lib", __dir__)
 $:.unshift(activesupport_path) if File.directory?(activesupport_path) && !$:.include?(activesupport_path)
 
diff --git a/railties/lib/rails/generators/actions.rb b/railties/lib/rails/generators/actions.rb
index e8bc76c69a..5cf0985050 100644
--- a/railties/lib/rails/generators/actions.rb
+++ b/railties/lib/rails/generators/actions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     module Actions
diff --git a/railties/lib/rails/generators/actions/create_migration.rb b/railties/lib/rails/generators/actions/create_migration.rb
index 5f18368f45..d06609e91e 100644
--- a/railties/lib/rails/generators/actions/create_migration.rb
+++ b/railties/lib/rails/generators/actions/create_migration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "thor/actions"
 
diff --git a/railties/lib/rails/generators/active_model.rb b/railties/lib/rails/generators/active_model.rb
index 6f61a7a041..2679d06fe4 100644
--- a/railties/lib/rails/generators/active_model.rb
+++ b/railties/lib/rails/generators/active_model.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     # ActiveModel is a class to be implemented by each ORM to allow Rails to
diff --git a/railties/lib/rails/generators/app_base.rb b/railties/lib/rails/generators/app_base.rb
index dc5c5c12f3..8429b6c7b8 100644
--- a/railties/lib/rails/generators/app_base.rb
+++ b/railties/lib/rails/generators/app_base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "fileutils"
 require "digest/md5"
 require "active_support/core_ext/string/strip"
diff --git a/railties/lib/rails/generators/base.rb b/railties/lib/rails/generators/base.rb
index c0e9e1c751..e7f51dba99 100644
--- a/railties/lib/rails/generators/base.rb
+++ b/railties/lib/rails/generators/base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 begin
   require "thor/group"
 rescue LoadError
diff --git a/railties/lib/rails/generators/css/assets/assets_generator.rb b/railties/lib/rails/generators/css/assets/assets_generator.rb
index 7ceee5a12a..af7b5cf609 100644
--- a/railties/lib/rails/generators/css/assets/assets_generator.rb
+++ b/railties/lib/rails/generators/css/assets/assets_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module Css # :nodoc:
diff --git a/railties/lib/rails/generators/css/scaffold/scaffold_generator.rb b/railties/lib/rails/generators/css/scaffold/scaffold_generator.rb
index 868a5b3645..cf534030f9 100644
--- a/railties/lib/rails/generators/css/scaffold/scaffold_generator.rb
+++ b/railties/lib/rails/generators/css/scaffold/scaffold_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module Css # :nodoc:
diff --git a/railties/lib/rails/generators/erb.rb b/railties/lib/rails/generators/erb.rb
index ce2c482eb5..97d9ab29d4 100644
--- a/railties/lib/rails/generators/erb.rb
+++ b/railties/lib/rails/generators/erb.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module Erb # :nodoc:
diff --git a/railties/lib/rails/generators/erb/controller/controller_generator.rb b/railties/lib/rails/generators/erb/controller/controller_generator.rb
index bedf1d40a1..36ecfea09b 100644
--- a/railties/lib/rails/generators/erb/controller/controller_generator.rb
+++ b/railties/lib/rails/generators/erb/controller/controller_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/erb"
 
 module Erb # :nodoc:
diff --git a/railties/lib/rails/generators/erb/mailer/mailer_generator.rb b/railties/lib/rails/generators/erb/mailer/mailer_generator.rb
index bfac10184e..3f1d9932f6 100644
--- a/railties/lib/rails/generators/erb/mailer/mailer_generator.rb
+++ b/railties/lib/rails/generators/erb/mailer/mailer_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/erb"
 
 module Erb # :nodoc:
diff --git a/railties/lib/rails/generators/erb/scaffold/scaffold_generator.rb b/railties/lib/rails/generators/erb/scaffold/scaffold_generator.rb
index 3b3567b16c..0d77ef21da 100644
--- a/railties/lib/rails/generators/erb/scaffold/scaffold_generator.rb
+++ b/railties/lib/rails/generators/erb/scaffold/scaffold_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/erb"
 require "rails/generators/resource_helpers"
 
diff --git a/railties/lib/rails/generators/generated_attribute.rb b/railties/lib/rails/generators/generated_attribute.rb
index c906457661..baed7bf1e3 100644
--- a/railties/lib/rails/generators/generated_attribute.rb
+++ b/railties/lib/rails/generators/generated_attribute.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/time"
 
 module Rails
diff --git a/railties/lib/rails/generators/js/assets/assets_generator.rb b/railties/lib/rails/generators/js/assets/assets_generator.rb
index c2d35be576..52a71b58cd 100644
--- a/railties/lib/rails/generators/js/assets/assets_generator.rb
+++ b/railties/lib/rails/generators/js/assets/assets_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module Js # :nodoc:
diff --git a/railties/lib/rails/generators/migration.rb b/railties/lib/rails/generators/migration.rb
index 7246cf3af7..82481169c3 100644
--- a/railties/lib/rails/generators/migration.rb
+++ b/railties/lib/rails/generators/migration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 require "rails/generators/actions/create_migration"
 
diff --git a/railties/lib/rails/generators/model_helpers.rb b/railties/lib/rails/generators/model_helpers.rb
index e25290b323..6f87a18660 100644
--- a/railties/lib/rails/generators/model_helpers.rb
+++ b/railties/lib/rails/generators/model_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/active_model"
 
 module Rails
diff --git a/railties/lib/rails/generators/named_base.rb b/railties/lib/rails/generators/named_base.rb
index e54240b86f..aef66adb64 100644
--- a/railties/lib/rails/generators/named_base.rb
+++ b/railties/lib/rails/generators/named_base.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/introspection"
 require "rails/generators/base"
 require "rails/generators/generated_attribute"
diff --git a/railties/lib/rails/generators/rails/app/app_generator.rb b/railties/lib/rails/generators/rails/app/app_generator.rb
index 03411d2822..45b9e7bdff 100644
--- a/railties/lib/rails/generators/rails/app/app_generator.rb
+++ b/railties/lib/rails/generators/rails/app/app_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/app_base"
 
 module Rails
diff --git a/railties/lib/rails/generators/rails/assets/assets_generator.rb b/railties/lib/rails/generators/rails/assets/assets_generator.rb
index ab98224199..95d00c2d39 100644
--- a/railties/lib/rails/generators/rails/assets/assets_generator.rb
+++ b/railties/lib/rails/generators/rails/assets/assets_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class AssetsGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/controller/controller_generator.rb b/railties/lib/rails/generators/rails/controller/controller_generator.rb
index 993ef27e8c..06bdb8b5ce 100644
--- a/railties/lib/rails/generators/rails/controller/controller_generator.rb
+++ b/railties/lib/rails/generators/rails/controller/controller_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class ControllerGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/encrypted_secrets/encrypted_secrets_generator.rb b/railties/lib/rails/generators/rails/encrypted_secrets/encrypted_secrets_generator.rb
index 1c8da5df8b..1da2fbc1a5 100644
--- a/railties/lib/rails/generators/rails/encrypted_secrets/encrypted_secrets_generator.rb
+++ b/railties/lib/rails/generators/rails/encrypted_secrets/encrypted_secrets_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/base"
 require "rails/secrets"
 
diff --git a/railties/lib/rails/generators/rails/generator/generator_generator.rb b/railties/lib/rails/generators/rails/generator/generator_generator.rb
index 4a71cdca89..299a7da5f1 100644
--- a/railties/lib/rails/generators/rails/generator/generator_generator.rb
+++ b/railties/lib/rails/generators/rails/generator/generator_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class GeneratorGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/helper/helper_generator.rb b/railties/lib/rails/generators/rails/helper/helper_generator.rb
index 62230008ad..e48b1b6fb3 100644
--- a/railties/lib/rails/generators/rails/helper/helper_generator.rb
+++ b/railties/lib/rails/generators/rails/helper/helper_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class HelperGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/integration_test/integration_test_generator.rb b/railties/lib/rails/generators/rails/integration_test/integration_test_generator.rb
index 56c4b36134..70770ddcb8 100644
--- a/railties/lib/rails/generators/rails/integration_test/integration_test_generator.rb
+++ b/railties/lib/rails/generators/rails/integration_test/integration_test_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class IntegrationTestGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/migration/migration_generator.rb b/railties/lib/rails/generators/rails/migration/migration_generator.rb
index c294c932b0..fca2a8fef4 100644
--- a/railties/lib/rails/generators/rails/migration/migration_generator.rb
+++ b/railties/lib/rails/generators/rails/migration/migration_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class MigrationGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/model/model_generator.rb b/railties/lib/rails/generators/rails/model/model_generator.rb
index ffa04cc029..c32a8a079a 100644
--- a/railties/lib/rails/generators/rails/model/model_generator.rb
+++ b/railties/lib/rails/generators/rails/model/model_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/model_helpers"
 
 module Rails
diff --git a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
index f60b1099a8..445235852d 100644
--- a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
+++ b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 require "rails/generators/rails/app/app_generator"
 require "date"
diff --git a/railties/lib/rails/generators/rails/resource/resource_generator.rb b/railties/lib/rails/generators/rails/resource/resource_generator.rb
index a36e2cedc0..5ac5164af0 100644
--- a/railties/lib/rails/generators/rails/resource/resource_generator.rb
+++ b/railties/lib/rails/generators/rails/resource/resource_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/resource_helpers"
 require "rails/generators/rails/model/model_generator"
 
diff --git a/railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb b/railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb
index 66e5e6e4db..42705107ae 100644
--- a/railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb
+++ b/railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class ResourceRouteGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb b/railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb
index 1d02ec909e..9522778c09 100644
--- a/railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb
+++ b/railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/rails/resource/resource_generator"
 
 module Rails
diff --git a/railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb b/railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb
index 44ac488665..cf97c22160 100644
--- a/railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb
+++ b/railties/lib/rails/generators/rails/scaffold_controller/scaffold_controller_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/resource_helpers"
 
 module Rails
diff --git a/railties/lib/rails/generators/rails/system_test/system_test_generator.rb b/railties/lib/rails/generators/rails/system_test/system_test_generator.rb
index 382d33252f..901120e892 100644
--- a/railties/lib/rails/generators/rails/system_test/system_test_generator.rb
+++ b/railties/lib/rails/generators/rails/system_test/system_test_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class SystemTestGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/rails/task/task_generator.rb b/railties/lib/rails/generators/rails/task/task_generator.rb
index f93b325844..bb96bdf0dd 100644
--- a/railties/lib/rails/generators/rails/task/task_generator.rb
+++ b/railties/lib/rails/generators/rails/task/task_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     class TaskGenerator < NamedBase # :nodoc:
diff --git a/railties/lib/rails/generators/resource_helpers.rb b/railties/lib/rails/generators/resource_helpers.rb
index 41511b49a2..e7cb722473 100644
--- a/railties/lib/rails/generators/resource_helpers.rb
+++ b/railties/lib/rails/generators/resource_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/active_model"
 require "rails/generators/model_helpers"
 
diff --git a/railties/lib/rails/generators/test_case.rb b/railties/lib/rails/generators/test_case.rb
index e851854ae7..575af80303 100644
--- a/railties/lib/rails/generators/test_case.rb
+++ b/railties/lib/rails/generators/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 require "rails/generators/testing/behaviour"
 require "rails/generators/testing/setup_and_teardown"
diff --git a/railties/lib/rails/generators/test_unit.rb b/railties/lib/rails/generators/test_unit.rb
index ef4ed0e53e..722efcf492 100644
--- a/railties/lib/rails/generators/test_unit.rb
+++ b/railties/lib/rails/generators/test_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/named_base"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/controller/controller_generator.rb b/railties/lib/rails/generators/test_unit/controller/controller_generator.rb
index b136bc740f..ac528d94f1 100644
--- a/railties/lib/rails/generators/test_unit/controller/controller_generator.rb
+++ b/railties/lib/rails/generators/test_unit/controller/controller_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/generator/generator_generator.rb b/railties/lib/rails/generators/test_unit/generator/generator_generator.rb
index 1cb60481a4..6b6e094453 100644
--- a/railties/lib/rails/generators/test_unit/generator/generator_generator.rb
+++ b/railties/lib/rails/generators/test_unit/generator/generator_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/helper/helper_generator.rb b/railties/lib/rails/generators/test_unit/helper/helper_generator.rb
index 506dda4e62..6674a15fa3 100644
--- a/railties/lib/rails/generators/test_unit/helper/helper_generator.rb
+++ b/railties/lib/rails/generators/test_unit/helper/helper_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/integration/integration_generator.rb b/railties/lib/rails/generators/test_unit/integration/integration_generator.rb
index 4810986f83..9d065c1297 100644
--- a/railties/lib/rails/generators/test_unit/integration/integration_generator.rb
+++ b/railties/lib/rails/generators/test_unit/integration/integration_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/job/job_generator.rb b/railties/lib/rails/generators/test_unit/job/job_generator.rb
index c35fd258a0..6975252b99 100644
--- a/railties/lib/rails/generators/test_unit/job/job_generator.rb
+++ b/railties/lib/rails/generators/test_unit/job/job_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/mailer/mailer_generator.rb b/railties/lib/rails/generators/test_unit/mailer/mailer_generator.rb
index 60954d02c7..67bff8e4f9 100644
--- a/railties/lib/rails/generators/test_unit/mailer/mailer_generator.rb
+++ b/railties/lib/rails/generators/test_unit/mailer/mailer_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/model/model_generator.rb b/railties/lib/rails/generators/test_unit/model/model_generator.rb
index f4327c0c35..99495d5247 100644
--- a/railties/lib/rails/generators/test_unit/model/model_generator.rb
+++ b/railties/lib/rails/generators/test_unit/model/model_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/plugin/plugin_generator.rb b/railties/lib/rails/generators/test_unit/plugin/plugin_generator.rb
index 2f02efca23..f1c9b6da5b 100644
--- a/railties/lib/rails/generators/test_unit/plugin/plugin_generator.rb
+++ b/railties/lib/rails/generators/test_unit/plugin/plugin_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/test_unit/scaffold/scaffold_generator.rb b/railties/lib/rails/generators/test_unit/scaffold/scaffold_generator.rb
index 9772317053..ef2cf3e389 100644
--- a/railties/lib/rails/generators/test_unit/scaffold/scaffold_generator.rb
+++ b/railties/lib/rails/generators/test_unit/scaffold/scaffold_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 require "rails/generators/resource_helpers"
 
diff --git a/railties/lib/rails/generators/test_unit/system/system_generator.rb b/railties/lib/rails/generators/test_unit/system/system_generator.rb
index 7242bc0d0d..0514957d9c 100644
--- a/railties/lib/rails/generators/test_unit/system/system_generator.rb
+++ b/railties/lib/rails/generators/test_unit/system/system_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/test_unit"
 
 module TestUnit # :nodoc:
diff --git a/railties/lib/rails/generators/testing/assertions.rb b/railties/lib/rails/generators/testing/assertions.rb
index abfa3340ae..1cabf4e28c 100644
--- a/railties/lib/rails/generators/testing/assertions.rb
+++ b/railties/lib/rails/generators/testing/assertions.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     module Testing
diff --git a/railties/lib/rails/generators/testing/behaviour.rb b/railties/lib/rails/generators/testing/behaviour.rb
index e66d7dc64f..ce0e42e60d 100644
--- a/railties/lib/rails/generators/testing/behaviour.rb
+++ b/railties/lib/rails/generators/testing/behaviour.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/class/attribute"
 require "active_support/core_ext/module/delegation"
 require "active_support/core_ext/hash/reverse_merge"
diff --git a/railties/lib/rails/generators/testing/setup_and_teardown.rb b/railties/lib/rails/generators/testing/setup_and_teardown.rb
index ca2ad244b5..73102a283f 100644
--- a/railties/lib/rails/generators/testing/setup_and_teardown.rb
+++ b/railties/lib/rails/generators/testing/setup_and_teardown.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Generators
     module Testing
diff --git a/railties/lib/rails/info.rb b/railties/lib/rails/info.rb
index 2641f778ea..db08d578c0 100644
--- a/railties/lib/rails/info.rb
+++ b/railties/lib/rails/info.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "cgi"
 
 module Rails
diff --git a/railties/lib/rails/info_controller.rb b/railties/lib/rails/info_controller.rb
index 172b2ad172..8b553aea79 100644
--- a/railties/lib/rails/info_controller.rb
+++ b/railties/lib/rails/info_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/application_controller"
 require "action_dispatch/routing/inspector"
 
diff --git a/railties/lib/rails/initializable.rb b/railties/lib/rails/initializable.rb
index c25b0912f6..a2615d5efd 100644
--- a/railties/lib/rails/initializable.rb
+++ b/railties/lib/rails/initializable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "tsort"
 
 module Rails
diff --git a/railties/lib/rails/mailers_controller.rb b/railties/lib/rails/mailers_controller.rb
index 0e0ecf0944..7ff55ef5bf 100644
--- a/railties/lib/rails/mailers_controller.rb
+++ b/railties/lib/rails/mailers_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/application_controller"
 
 class Rails::MailersController < Rails::ApplicationController # :nodoc:
diff --git a/railties/lib/rails/paths.rb b/railties/lib/rails/paths.rb
index d6a06d1aa7..6bdb673215 100644
--- a/railties/lib/rails/paths.rb
+++ b/railties/lib/rails/paths.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Paths
     # This object is an extended hash that behaves as root of the <tt>Rails::Paths</tt> system.
diff --git a/railties/lib/rails/plugin/test.rb b/railties/lib/rails/plugin/test.rb
index 88a24d4a4c..ff043b488e 100644
--- a/railties/lib/rails/plugin/test.rb
+++ b/railties/lib/rails/plugin/test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/test_unit/minitest_plugin"
 
 Rails::TestUnitReporter.executable = "bin/test"
diff --git a/railties/lib/rails/rack.rb b/railties/lib/rails/rack.rb
index ce08a23e2f..a4c4527a72 100644
--- a/railties/lib/rails/rack.rb
+++ b/railties/lib/rails/rack.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   module Rack
     autoload :Logger, "rails/rack/logger"
diff --git a/railties/lib/rails/rack/logger.rb b/railties/lib/rails/rack/logger.rb
index 577182c609..853fc26051 100644
--- a/railties/lib/rails/rack/logger.rb
+++ b/railties/lib/rails/rack/logger.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/time/conversions"
 require "active_support/core_ext/object/blank"
 require "active_support/log_subscriber"
diff --git a/railties/lib/rails/railtie.rb b/railties/lib/rails/railtie.rb
index 910f9b5d09..eca8335559 100644
--- a/railties/lib/rails/railtie.rb
+++ b/railties/lib/rails/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/initializable"
 require "active_support/inflector"
 require "active_support/core_ext/module/introspection"
diff --git a/railties/lib/rails/railtie/configurable.rb b/railties/lib/rails/railtie/configurable.rb
index e58586cfa8..2a8295426e 100644
--- a/railties/lib/rails/railtie/configurable.rb
+++ b/railties/lib/rails/railtie/configurable.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/concern"
 
 module Rails
diff --git a/railties/lib/rails/railtie/configuration.rb b/railties/lib/rails/railtie/configuration.rb
index f5702f8b9e..aecc81c491 100644
--- a/railties/lib/rails/railtie/configuration.rb
+++ b/railties/lib/rails/railtie/configuration.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/configuration"
 
 module Rails
diff --git a/railties/lib/rails/ruby_version_check.rb b/railties/lib/rails/ruby_version_check.rb
index f99767c97c..b212835df7 100644
--- a/railties/lib/rails/ruby_version_check.rb
+++ b/railties/lib/rails/ruby_version_check.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 if RUBY_VERSION < "2.2.2" && RUBY_ENGINE == "ruby"
   desc = defined?(RUBY_DESCRIPTION) ? RUBY_DESCRIPTION : "ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE})"
   abort <<-end_message
diff --git a/railties/lib/rails/secrets.rb b/railties/lib/rails/secrets.rb
index c9524a643c..c7a8676d7b 100644
--- a/railties/lib/rails/secrets.rb
+++ b/railties/lib/rails/secrets.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "yaml"
 require "active_support/message_encryptor"
 require "active_support/core_ext/string/strip"
diff --git a/railties/lib/rails/source_annotation_extractor.rb b/railties/lib/rails/source_annotation_extractor.rb
index 5e17bc7211..e9088c44ce 100644
--- a/railties/lib/rails/source_annotation_extractor.rb
+++ b/railties/lib/rails/source_annotation_extractor.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Implements the logic behind the rake tasks for annotations like
 #
 #   rails notes
diff --git a/railties/lib/rails/tasks.rb b/railties/lib/rails/tasks.rb
index 0bdd1efd07..c0a50e5bda 100644
--- a/railties/lib/rails/tasks.rb
+++ b/railties/lib/rails/tasks.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rake"
 
 # Load Rails Rakefile extensions
diff --git a/railties/lib/rails/tasks/annotations.rake b/railties/lib/rails/tasks/annotations.rake
index 802ef93bf3..9a69eb9934 100644
--- a/railties/lib/rails/tasks/annotations.rake
+++ b/railties/lib/rails/tasks/annotations.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/source_annotation_extractor"
 
 desc "Enumerate all annotations (use notes:optimize, :fixme, :todo for focus)"
diff --git a/railties/lib/rails/tasks/dev.rake b/railties/lib/rails/tasks/dev.rake
index 5f6070ae42..334e968123 100644
--- a/railties/lib/rails/tasks/dev.rake
+++ b/railties/lib/rails/tasks/dev.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/dev_caching"
 
 namespace :dev do
diff --git a/railties/lib/rails/tasks/engine.rake b/railties/lib/rails/tasks/engine.rake
index fb9f6ce1c2..177b138090 100644
--- a/railties/lib/rails/tasks/engine.rake
+++ b/railties/lib/rails/tasks/engine.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 task "load_app" do
   namespace :app do
     load APP_RAKEFILE
diff --git a/railties/lib/rails/tasks/framework.rake b/railties/lib/rails/tasks/framework.rake
index d63af956bc..80720a42ff 100644
--- a/railties/lib/rails/tasks/framework.rake
+++ b/railties/lib/rails/tasks/framework.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :app do
   desc "Update configs and some other initially generated files (or use just update:configs or update:bin)"
   task update: [ "update:configs", "update:bin", "update:upgrade_guide_info" ]
diff --git a/railties/lib/rails/tasks/initializers.rake b/railties/lib/rails/tasks/initializers.rake
index fa475c06be..6522f2ae5a 100644
--- a/railties/lib/rails/tasks/initializers.rake
+++ b/railties/lib/rails/tasks/initializers.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 desc "Print out all defined initializers in the order they are invoked by Rails."
 task initializers: :environment do
   Rails.application.initializers.tsort_each do |initializer|
diff --git a/railties/lib/rails/tasks/log.rake b/railties/lib/rails/tasks/log.rake
index 39b08f5433..ba796845d7 100644
--- a/railties/lib/rails/tasks/log.rake
+++ b/railties/lib/rails/tasks/log.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :log do
 
   ##
diff --git a/railties/lib/rails/tasks/middleware.rake b/railties/lib/rails/tasks/middleware.rake
index d0d061bf7d..fd98be1ea9 100644
--- a/railties/lib/rails/tasks/middleware.rake
+++ b/railties/lib/rails/tasks/middleware.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 desc "Prints out your Rack middleware stack"
 task middleware: :environment do
   Rails.configuration.middleware.each do |middleware|
diff --git a/railties/lib/rails/tasks/misc.rake b/railties/lib/rails/tasks/misc.rake
index 4ac7f60fe9..29ea0ff804 100644
--- a/railties/lib/rails/tasks/misc.rake
+++ b/railties/lib/rails/tasks/misc.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 desc "Generate a cryptographically secure secret key (this is typically used to generate a secret for cookie sessions)."
 task :secret do
   require "securerandom"
diff --git a/railties/lib/rails/tasks/restart.rake b/railties/lib/rails/tasks/restart.rake
index 05840f6562..03177d9954 100644
--- a/railties/lib/rails/tasks/restart.rake
+++ b/railties/lib/rails/tasks/restart.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 desc "Restart app by touching tmp/restart.txt"
 task :restart do
   verbose(false) do
diff --git a/railties/lib/rails/tasks/routes.rake b/railties/lib/rails/tasks/routes.rake
index ac04b84d87..215fb2ceb5 100644
--- a/railties/lib/rails/tasks/routes.rake
+++ b/railties/lib/rails/tasks/routes.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "optparse"
 
 desc "Print out all defined routes in match order, with names. Target specific controller with -c option, or grep routes using -g option"
diff --git a/railties/lib/rails/tasks/statistics.rake b/railties/lib/rails/tasks/statistics.rake
index c80f44a7ce..cb569be58b 100644
--- a/railties/lib/rails/tasks/statistics.rake
+++ b/railties/lib/rails/tasks/statistics.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # While global constants are bad, many 3rd party tools depend on this one (e.g
 # rspec-rails & cucumber-rails). So a deprecation warning is needed if we want
 # to remove it.
diff --git a/railties/lib/rails/tasks/tmp.rake b/railties/lib/rails/tasks/tmp.rake
index 2e082a309f..3d8ced1bf3 100644
--- a/railties/lib/rails/tasks/tmp.rake
+++ b/railties/lib/rails/tasks/tmp.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :tmp do
   desc "Clear cache, socket and screenshot files from tmp/ (narrow w/ tmp:cache:clear, tmp:sockets:clear, tmp:screenshots:clear)"
   task clear: ["tmp:cache:clear", "tmp:sockets:clear", "tmp:screenshots:clear"]
diff --git a/railties/lib/rails/tasks/yarn.rake b/railties/lib/rails/tasks/yarn.rake
index 1d3a69e455..87476b1b8c 100644
--- a/railties/lib/rails/tasks/yarn.rake
+++ b/railties/lib/rails/tasks/yarn.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 namespace :yarn do
   desc "Install all JavaScript dependencies as specified via Yarn"
   task :install do
diff --git a/railties/lib/rails/test_help.rb b/railties/lib/rails/test_help.rb
index fe198f4d99..81537d813e 100644
--- a/railties/lib/rails/test_help.rb
+++ b/railties/lib/rails/test_help.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Make double-sure the RAILS_ENV is not set to production,
 # so fixtures aren't loaded into that environment
 abort("Abort testing: Your Rails environment is running in production mode!") if Rails.env.production?
diff --git a/railties/lib/rails/test_unit/line_filtering.rb b/railties/lib/rails/test_unit/line_filtering.rb
index e60c003380..32ba744701 100644
--- a/railties/lib/rails/test_unit/line_filtering.rb
+++ b/railties/lib/rails/test_unit/line_filtering.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "method_source"
 
 module Rails
diff --git a/railties/lib/rails/test_unit/minitest_plugin.rb b/railties/lib/rails/test_unit/minitest_plugin.rb
index 9ebd635461..5d0cf1305f 100644
--- a/railties/lib/rails/test_unit/minitest_plugin.rb
+++ b/railties/lib/rails/test_unit/minitest_plugin.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "rails/test_unit/reporter"
 require "rails/test_unit/test_requirer"
diff --git a/railties/lib/rails/test_unit/railtie.rb b/railties/lib/rails/test_unit/railtie.rb
index f1cbbcea2d..443e743421 100644
--- a/railties/lib/rails/test_unit/railtie.rb
+++ b/railties/lib/rails/test_unit/railtie.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/test_unit/line_filtering"
 
 if defined?(Rake.application) && Rake.application.top_level_tasks.grep(/^(default$|test(:|$))/).any?
diff --git a/railties/lib/rails/test_unit/reporter.rb b/railties/lib/rails/test_unit/reporter.rb
index d92415c7d9..1cc27f7b6c 100644
--- a/railties/lib/rails/test_unit/reporter.rb
+++ b/railties/lib/rails/test_unit/reporter.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/class/attribute"
 require "minitest"
 
diff --git a/railties/lib/rails/test_unit/test_requirer.rb b/railties/lib/rails/test_unit/test_requirer.rb
index 2006201209..92e5fcf0bc 100644
--- a/railties/lib/rails/test_unit/test_requirer.rb
+++ b/railties/lib/rails/test_unit/test_requirer.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/core_ext/object/blank"
 require "rake/file_list"
 
diff --git a/railties/lib/rails/test_unit/testing.rake b/railties/lib/rails/test_unit/testing.rake
index d79a52557f..33408081f1 100644
--- a/railties/lib/rails/test_unit/testing.rake
+++ b/railties/lib/rails/test_unit/testing.rake
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 gem "minitest"
 require "minitest"
 require "rails/test_unit/minitest_plugin"
diff --git a/railties/lib/rails/version.rb b/railties/lib/rails/version.rb
index 6391949aac..3d8e8291d1 100644
--- a/railties/lib/rails/version.rb
+++ b/railties/lib/rails/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require_relative "gem_version"
 
 module Rails
diff --git a/railties/lib/rails/welcome_controller.rb b/railties/lib/rails/welcome_controller.rb
index 0ce4d9e934..b757dc72ef 100644
--- a/railties/lib/rails/welcome_controller.rb
+++ b/railties/lib/rails/welcome_controller.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/application_controller"
 
 class Rails::WelcomeController < Rails::ApplicationController # :nodoc:
diff --git a/railties/railties.gemspec b/railties/railties.gemspec
index b6bad76a89..e5587b531a 100644
--- a/railties/railties.gemspec
+++ b/railties/railties.gemspec
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/railties/test/abstract_unit.rb b/railties/test/abstract_unit.rb
index e04bce24cb..2d4c7a0f0b 100644
--- a/railties/test/abstract_unit.rb
+++ b/railties/test/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 ENV["RAILS_ENV"] ||= "test"
 
 require "stringio"
diff --git a/railties/test/app_loader_test.rb b/railties/test/app_loader_test.rb
index 6210215dc8..85f5502b4d 100644
--- a/railties/test/app_loader_test.rb
+++ b/railties/test/app_loader_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "tmpdir"
 require "abstract_unit"
 require "rails/app_loader"
diff --git a/railties/test/application/asset_debugging_test.rb b/railties/test/application/asset_debugging_test.rb
index 1ce77fba9f..3e17a1efa5 100644
--- a/railties/test/application/asset_debugging_test.rb
+++ b/railties/test/application/asset_debugging_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/assets_test.rb b/railties/test/application/assets_test.rb
index 8e7f50b8de..f38cacd6da 100644
--- a/railties/test/application/assets_test.rb
+++ b/railties/test/application/assets_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 require "active_support/json"
diff --git a/railties/test/application/bin_setup_test.rb b/railties/test/application/bin_setup_test.rb
index a9009531aa..0fb995900f 100644
--- a/railties/test/application/bin_setup_test.rb
+++ b/railties/test/application/bin_setup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/configuration/custom_test.rb b/railties/test/application/configuration/custom_test.rb
index 71b33c15a4..8360b7bf4b 100644
--- a/railties/test/application/configuration/custom_test.rb
+++ b/railties/test/application/configuration/custom_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index e73c2a992c..06767167a9 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 require "env_helpers"
diff --git a/railties/test/application/console_test.rb b/railties/test/application/console_test.rb
index 7dc9d0083f..057d473870 100644
--- a/railties/test/application/console_test.rb
+++ b/railties/test/application/console_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 class ConsoleTest < ActiveSupport::TestCase
diff --git a/railties/test/application/current_attributes_integration_test.rb b/railties/test/application/current_attributes_integration_test.rb
index a10eb51851..5653ec0be1 100644
--- a/railties/test/application/current_attributes_integration_test.rb
+++ b/railties/test/application/current_attributes_integration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/generators_test.rb b/railties/test/application/generators_test.rb
index 9732216b92..fe581db286 100644
--- a/railties/test/application/generators_test.rb
+++ b/railties/test/application/generators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/help_test.rb b/railties/test/application/help_test.rb
index f92dd60a7c..0c3fe8bfa3 100644
--- a/railties/test/application/help_test.rb
+++ b/railties/test/application/help_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 class HelpTest < ActiveSupport::TestCase
diff --git a/railties/test/application/initializers/frameworks_test.rb b/railties/test/application/initializers/frameworks_test.rb
index c15e057b19..eb2c578f91 100644
--- a/railties/test/application/initializers/frameworks_test.rb
+++ b/railties/test/application/initializers/frameworks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/initializers/hooks_test.rb b/railties/test/application/initializers/hooks_test.rb
index 6acaea07dd..36926c50ff 100644
--- a/railties/test/application/initializers/hooks_test.rb
+++ b/railties/test/application/initializers/hooks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/initializers/i18n_test.rb b/railties/test/application/initializers/i18n_test.rb
index 4bf01c6f9e..cee198bd01 100644
--- a/railties/test/application/initializers/i18n_test.rb
+++ b/railties/test/application/initializers/i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/initializers/load_path_test.rb b/railties/test/application/initializers/load_path_test.rb
index 29f6bab256..dbefb22837 100644
--- a/railties/test/application/initializers/load_path_test.rb
+++ b/railties/test/application/initializers/load_path_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/initializers/notifications_test.rb b/railties/test/application/initializers/notifications_test.rb
index 0be4280f38..b847ac6b36 100644
--- a/railties/test/application/initializers/notifications_test.rb
+++ b/railties/test/application/initializers/notifications_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/integration_test_case_test.rb b/railties/test/application/integration_test_case_test.rb
index 73fc9f63c0..1118e5037a 100644
--- a/railties/test/application/integration_test_case_test.rb
+++ b/railties/test/application/integration_test_case_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/loading_test.rb b/railties/test/application/loading_test.rb
index 3572fd68eb..c75a25bc6f 100644
--- a/railties/test/application/loading_test.rb
+++ b/railties/test/application/loading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 class LoadingTest < ActiveSupport::TestCase
diff --git a/railties/test/application/mailer_previews_test.rb b/railties/test/application/mailer_previews_test.rb
index 7fc5adddaa..f5c013dab6 100644
--- a/railties/test/application/mailer_previews_test.rb
+++ b/railties/test/application/mailer_previews_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 require "base64"
diff --git a/railties/test/application/middleware/cache_test.rb b/railties/test/application/middleware/cache_test.rb
index cbb265bb7c..93b5263bf7 100644
--- a/railties/test/application/middleware/cache_test.rb
+++ b/railties/test/application/middleware/cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/middleware/cookies_test.rb b/railties/test/application/middleware/cookies_test.rb
index 725a35aac1..1e4b5d086c 100644
--- a/railties/test/application/middleware/cookies_test.rb
+++ b/railties/test/application/middleware/cookies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/middleware/exceptions_test.rb b/railties/test/application/middleware/exceptions_test.rb
index af91720943..fe07ad3cbe 100644
--- a/railties/test/application/middleware/exceptions_test.rb
+++ b/railties/test/application/middleware/exceptions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/middleware/remote_ip_test.rb b/railties/test/application/middleware/remote_ip_test.rb
index 68d97e9a96..c34d9d6ee7 100644
--- a/railties/test/application/middleware/remote_ip_test.rb
+++ b/railties/test/application/middleware/remote_ip_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "ipaddr"
 require "isolation/abstract_unit"
 require "active_support/key_generator"
diff --git a/railties/test/application/middleware/sendfile_test.rb b/railties/test/application/middleware/sendfile_test.rb
index d1bad10fdc..4938402fdc 100644
--- a/railties/test/application/middleware/sendfile_test.rb
+++ b/railties/test/application/middleware/sendfile_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/middleware/session_test.rb b/railties/test/application/middleware/session_test.rb
index 028309d8e4..a14ea589ed 100644
--- a/railties/test/application/middleware/session_test.rb
+++ b/railties/test/application/middleware/session_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/middleware/static_test.rb b/railties/test/application/middleware/static_test.rb
index 9a0a5f7265..5cd3e4325e 100644
--- a/railties/test/application/middleware/static_test.rb
+++ b/railties/test/application/middleware/static_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/middleware_test.rb b/railties/test/application/middleware_test.rb
index 64a3cbbfa1..0a6e5b52e9 100644
--- a/railties/test/application/middleware_test.rb
+++ b/railties/test/application/middleware_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/multiple_applications_test.rb b/railties/test/application/multiple_applications_test.rb
index 9e832b6892..26b810af73 100644
--- a/railties/test/application/multiple_applications_test.rb
+++ b/railties/test/application/multiple_applications_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/paths_test.rb b/railties/test/application/paths_test.rb
index 1c7db1bb9d..515205296c 100644
--- a/railties/test/application/paths_test.rb
+++ b/railties/test/application/paths_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/per_request_digest_cache_test.rb b/railties/test/application/per_request_digest_cache_test.rb
index 148043d5cb..6e6996a6ba 100644
--- a/railties/test/application/per_request_digest_cache_test.rb
+++ b/railties/test/application/per_request_digest_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 require "minitest/mock"
diff --git a/railties/test/application/rack/logger_test.rb b/railties/test/application/rack/logger_test.rb
index cb4d1d22af..e71bcbc536 100644
--- a/railties/test/application/rack/logger_test.rb
+++ b/railties/test/application/rack/logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "active_support/log_subscriber/test_helper"
 require "rack/test"
diff --git a/railties/test/application/rackup_test.rb b/railties/test/application/rackup_test.rb
index bf9e96cf45..2943e9ee5d 100644
--- a/railties/test/application/rackup_test.rb
+++ b/railties/test/application/rackup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/dbs_test.rb b/railties/test/application/rake/dbs_test.rb
index d5e5566635..c63f23fa0a 100644
--- a/railties/test/application/rake/dbs_test.rb
+++ b/railties/test/application/rake/dbs_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/dev_test.rb b/railties/test/application/rake/dev_test.rb
index 1556e5d5db..4f992d9c8d 100644
--- a/railties/test/application/rake/dev_test.rb
+++ b/railties/test/application/rake/dev_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/framework_test.rb b/railties/test/application/rake/framework_test.rb
index ec476addf4..40488a6aab 100644
--- a/railties/test/application/rake/framework_test.rb
+++ b/railties/test/application/rake/framework_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/log_test.rb b/railties/test/application/rake/log_test.rb
index 431492fb64..fdd3c71fe8 100644
--- a/railties/test/application/rake/log_test.rb
+++ b/railties/test/application/rake/log_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/migrations_test.rb b/railties/test/application/rake/migrations_test.rb
index 1cf780178f..51dfe2ef98 100644
--- a/railties/test/application/rake/migrations_test.rb
+++ b/railties/test/application/rake/migrations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/notes_test.rb b/railties/test/application/rake/notes_test.rb
index a500c55104..e7ffea2e71 100644
--- a/railties/test/application/rake/notes_test.rb
+++ b/railties/test/application/rake/notes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rails/source_annotation_extractor"
 
diff --git a/railties/test/application/rake/restart_test.rb b/railties/test/application/rake/restart_test.rb
index 640a0008e7..6ebd2d5461 100644
--- a/railties/test/application/rake/restart_test.rb
+++ b/railties/test/application/rake/restart_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake/tmp_test.rb b/railties/test/application/rake/tmp_test.rb
index d8f684dbe9..bc9865b0de 100644
--- a/railties/test/application/rake/tmp_test.rb
+++ b/railties/test/application/rake/tmp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/rake_test.rb b/railties/test/application/rake_test.rb
index a3508a4a12..1b64a0a1ca 100644
--- a/railties/test/application/rake_test.rb
+++ b/railties/test/application/rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "active_support/core_ext/string/strip"
 
diff --git a/railties/test/application/rendering_test.rb b/railties/test/application/rendering_test.rb
index 67843a09fa..ccafc5b6f1 100644
--- a/railties/test/application/rendering_test.rb
+++ b/railties/test/application/rendering_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/routing_test.rb b/railties/test/application/routing_test.rb
index 28a5ecb7ac..6742da20cc 100644
--- a/railties/test/application/routing_test.rb
+++ b/railties/test/application/routing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rack/test"
 
diff --git a/railties/test/application/runner_test.rb b/railties/test/application/runner_test.rb
index 9611797765..0c45bc398a 100644
--- a/railties/test/application/runner_test.rb
+++ b/railties/test/application/runner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "env_helpers"
 
diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 91a6229cc4..8e0712fca2 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "active_support/core_ext/string/strip"
 require "env_helpers"
diff --git a/railties/test/application/test_test.rb b/railties/test/application/test_test.rb
index c57cf548f7..32d2a6857c 100644
--- a/railties/test/application/test_test.rb
+++ b/railties/test/application/test_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/url_generation_test.rb b/railties/test/application/url_generation_test.rb
index c7d7db8a75..37f129475c 100644
--- a/railties/test/application/url_generation_test.rb
+++ b/railties/test/application/url_generation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/application/version_test.rb b/railties/test/application/version_test.rb
index ff3751446c..6b419ae7ae 100644
--- a/railties/test/application/version_test.rb
+++ b/railties/test/application/version_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rails/gem_version"
 
diff --git a/railties/test/backtrace_cleaner_test.rb b/railties/test/backtrace_cleaner_test.rb
index e72963ee91..f71e56f323 100644
--- a/railties/test/backtrace_cleaner_test.rb
+++ b/railties/test/backtrace_cleaner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/backtrace_cleaner"
 
diff --git a/railties/test/code_statistics_calculator_test.rb b/railties/test/code_statistics_calculator_test.rb
index 3e7be58e9c..25a8a40d27 100644
--- a/railties/test/code_statistics_calculator_test.rb
+++ b/railties/test/code_statistics_calculator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/code_statistics_calculator"
 
diff --git a/railties/test/code_statistics_test.rb b/railties/test/code_statistics_test.rb
index 8cc59f1154..e6e3943117 100644
--- a/railties/test/code_statistics_test.rb
+++ b/railties/test/code_statistics_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/code_statistics"
 
diff --git a/railties/test/command/base_test.rb b/railties/test/command/base_test.rb
index 02a508fea7..ebfc4d0ba9 100644
--- a/railties/test/command/base_test.rb
+++ b/railties/test/command/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/command"
 require "rails/commands/generate/generate_command"
diff --git a/railties/test/commands/console_test.rb b/railties/test/commands/console_test.rb
index 6fca08ad79..4fc082e4ca 100644
--- a/railties/test/commands/console_test.rb
+++ b/railties/test/commands/console_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "env_helpers"
 require "rails/command"
diff --git a/railties/test/commands/dbconsole_test.rb b/railties/test/commands/dbconsole_test.rb
index 3041f9233d..0f8c5dbb79 100644
--- a/railties/test/commands/dbconsole_test.rb
+++ b/railties/test/commands/dbconsole_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "minitest/mock"
 require "rails/command"
diff --git a/railties/test/commands/secrets_test.rb b/railties/test/commands/secrets_test.rb
index c06100cde2..be610f3b47 100644
--- a/railties/test/commands/secrets_test.rb
+++ b/railties/test/commands/secrets_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "rails/command"
 require "rails/commands/secrets/secrets_command"
diff --git a/railties/test/commands/server_test.rb b/railties/test/commands/server_test.rb
index a0d2535c77..722323efdc 100644
--- a/railties/test/commands/server_test.rb
+++ b/railties/test/commands/server_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "env_helpers"
 require "rails/command"
diff --git a/railties/test/configuration/middleware_stack_proxy_test.rb b/railties/test/configuration/middleware_stack_proxy_test.rb
index ca2293d65f..559ce72693 100644
--- a/railties/test/configuration/middleware_stack_proxy_test.rb
+++ b/railties/test/configuration/middleware_stack_proxy_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support"
 require "active_support/testing/autorun"
 require "rails/configuration"
diff --git a/railties/test/engine/commands_test.rb b/railties/test/engine/commands_test.rb
index e3811f0ea4..b1c937143f 100644
--- a/railties/test/engine/commands_test.rb
+++ b/railties/test/engine/commands_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 begin
   require "pty"
diff --git a/railties/test/engine_test.rb b/railties/test/engine_test.rb
index 9a2629a9f2..248afa2d2c 100644
--- a/railties/test/engine_test.rb
+++ b/railties/test/engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class EngineTest < ActiveSupport::TestCase
diff --git a/railties/test/env_helpers.rb b/railties/test/env_helpers.rb
index 72f3008877..1f64d5fda3 100644
--- a/railties/test/env_helpers.rb
+++ b/railties/test/env_helpers.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails"
 
 module EnvHelpers
diff --git a/railties/test/fixtures/about_yml_plugins/bad_about_yml/init.rb b/railties/test/fixtures/about_yml_plugins/bad_about_yml/init.rb
index 23b1b41541..636bc1a8ab 100644
--- a/railties/test/fixtures/about_yml_plugins/bad_about_yml/init.rb
+++ b/railties/test/fixtures/about_yml_plugins/bad_about_yml/init.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 # intentionally empty
diff --git a/railties/test/fixtures/about_yml_plugins/plugin_without_about_yml/init.rb b/railties/test/fixtures/about_yml_plugins/plugin_without_about_yml/init.rb
index 23b1b41541..636bc1a8ab 100644
--- a/railties/test/fixtures/about_yml_plugins/plugin_without_about_yml/init.rb
+++ b/railties/test/fixtures/about_yml_plugins/plugin_without_about_yml/init.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 # intentionally empty
diff --git a/railties/test/fixtures/lib/create_test_dummy_template.rb b/railties/test/fixtures/lib/create_test_dummy_template.rb
index 934f1b9bca..e4378bbd1a 100644
--- a/railties/test/fixtures/lib/create_test_dummy_template.rb
+++ b/railties/test/fixtures/lib/create_test_dummy_template.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 create_dummy_app("spec/dummy")
diff --git a/railties/test/fixtures/lib/generators/active_record/fixjour_generator.rb b/railties/test/fixtures/lib/generators/active_record/fixjour_generator.rb
index 5f29d43851..1139350b94 100644
--- a/railties/test/fixtures/lib/generators/active_record/fixjour_generator.rb
+++ b/railties/test/fixtures/lib/generators/active_record/fixjour_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators/active_record"
 
 module ActiveRecord
diff --git a/railties/test/fixtures/lib/generators/fixjour_generator.rb b/railties/test/fixtures/lib/generators/fixjour_generator.rb
index 587cbf3e30..ef3e9edbed 100644
--- a/railties/test/fixtures/lib/generators/fixjour_generator.rb
+++ b/railties/test/fixtures/lib/generators/fixjour_generator.rb
@@ -1,3 +1,2 @@
-# frozen_string_literal: true
 class FixjourGenerator < Rails::Generators::NamedBase
 end
diff --git a/railties/test/fixtures/lib/generators/model_generator.rb b/railties/test/fixtures/lib/generators/model_generator.rb
index 422e19e388..0905fa9631 100644
--- a/railties/test/fixtures/lib/generators/model_generator.rb
+++ b/railties/test/fixtures/lib/generators/model_generator.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 raise "I should never be loaded"
diff --git a/railties/test/fixtures/lib/generators/usage_template/usage_template_generator.rb b/railties/test/fixtures/lib/generators/usage_template/usage_template_generator.rb
index df2cdadaea..701515440a 100644
--- a/railties/test/fixtures/lib/generators/usage_template/usage_template_generator.rb
+++ b/railties/test/fixtures/lib/generators/usage_template/usage_template_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "rails/generators"
 
 class UsageTemplateGenerator < Rails::Generators::Base
diff --git a/railties/test/fixtures/lib/rails/generators/foobar/foobar_generator.rb b/railties/test/fixtures/lib/rails/generators/foobar/foobar_generator.rb
index d7e4a8fdca..d1de8c56fa 100644
--- a/railties/test/fixtures/lib/rails/generators/foobar/foobar_generator.rb
+++ b/railties/test/fixtures/lib/rails/generators/foobar/foobar_generator.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Foobar
   class FoobarGenerator < Rails::Generators::Base
   end
diff --git a/railties/test/fixtures/lib/template.rb b/railties/test/fixtures/lib/template.rb
index eccba91236..c14a1a8784 100644
--- a/railties/test/fixtures/lib/template.rb
+++ b/railties/test/fixtures/lib/template.rb
@@ -1,2 +1 @@
-# frozen_string_literal: true
 say "It works from file!"
diff --git a/railties/test/generators/actions_test.rb b/railties/test/generators/actions_test.rb
index 2e212b0e71..03b29be907 100644
--- a/railties/test/generators/actions_test.rb
+++ b/railties/test/generators/actions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/app/app_generator"
 require "env_helpers"
diff --git a/railties/test/generators/api_app_generator_test.rb b/railties/test/generators/api_app_generator_test.rb
index 86b99ec6f1..a19e0f0dd8 100644
--- a/railties/test/generators/api_app_generator_test.rb
+++ b/railties/test/generators/api_app_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/app/app_generator"
 
diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 554c57d670..9364f11a98 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/app/app_generator"
 require "generators/shared_generator_tests"
diff --git a/railties/test/generators/argv_scrubber_test.rb b/railties/test/generators/argv_scrubber_test.rb
index 61f28c0731..7f4295a20f 100644
--- a/railties/test/generators/argv_scrubber_test.rb
+++ b/railties/test/generators/argv_scrubber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/test_case"
 require "active_support/testing/autorun"
 require "rails/generators/rails/app/app_generator"
diff --git a/railties/test/generators/assets_generator_test.rb b/railties/test/generators/assets_generator_test.rb
index 55b910b2dd..1c02c67e42 100644
--- a/railties/test/generators/assets_generator_test.rb
+++ b/railties/test/generators/assets_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/assets/assets_generator"
 
diff --git a/railties/test/generators/channel_generator_test.rb b/railties/test/generators/channel_generator_test.rb
index ef09b172ff..af68a9c49f 100644
--- a/railties/test/generators/channel_generator_test.rb
+++ b/railties/test/generators/channel_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/channel/channel_generator"
 
diff --git a/railties/test/generators/controller_generator_test.rb b/railties/test/generators/controller_generator_test.rb
index d573b3b803..af86a0136f 100644
--- a/railties/test/generators/controller_generator_test.rb
+++ b/railties/test/generators/controller_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/controller/controller_generator"
 
diff --git a/railties/test/generators/create_migration_test.rb b/railties/test/generators/create_migration_test.rb
index 3d2d39bba5..c7b0237f02 100644
--- a/railties/test/generators/create_migration_test.rb
+++ b/railties/test/generators/create_migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/migration/migration_generator"
 
diff --git a/railties/test/generators/encrypted_secrets_generator_test.rb b/railties/test/generators/encrypted_secrets_generator_test.rb
index 32651d81ae..21fdcab19f 100644
--- a/railties/test/generators/encrypted_secrets_generator_test.rb
+++ b/railties/test/generators/encrypted_secrets_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/encrypted_secrets/encrypted_secrets_generator"
 
diff --git a/railties/test/generators/generated_attribute_test.rb b/railties/test/generators/generated_attribute_test.rb
index 29d6c0f4fc..97847c8624 100644
--- a/railties/test/generators/generated_attribute_test.rb
+++ b/railties/test/generators/generated_attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/generated_attribute"
 
diff --git a/railties/test/generators/generator_generator_test.rb b/railties/test/generators/generator_generator_test.rb
index c5d8412307..5ff8bb0357 100644
--- a/railties/test/generators/generator_generator_test.rb
+++ b/railties/test/generators/generator_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/generator/generator_generator"
 
diff --git a/railties/test/generators/generator_test.rb b/railties/test/generators/generator_test.rb
index f9bfee2fa1..4444b3a56e 100644
--- a/railties/test/generators/generator_test.rb
+++ b/railties/test/generators/generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "active_support/test_case"
 require "active_support/testing/autorun"
 require "rails/generators/app_base"
diff --git a/railties/test/generators/generators_test_helper.rb b/railties/test/generators/generators_test_helper.rb
index 73fb2a86c8..5fb331e197 100644
--- a/railties/test/generators/generators_test_helper.rb
+++ b/railties/test/generators/generators_test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/module/remove_method"
 require "active_support/testing/stream"
diff --git a/railties/test/generators/helper_generator_test.rb b/railties/test/generators/helper_generator_test.rb
index 683cd13cfb..d9e6e0a85a 100644
--- a/railties/test/generators/helper_generator_test.rb
+++ b/railties/test/generators/helper_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/helper/helper_generator"
 
diff --git a/railties/test/generators/integration_test_generator_test.rb b/railties/test/generators/integration_test_generator_test.rb
index dc586f60b4..9358b63bd4 100644
--- a/railties/test/generators/integration_test_generator_test.rb
+++ b/railties/test/generators/integration_test_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/integration_test/integration_test_generator"
 
diff --git a/railties/test/generators/job_generator_test.rb b/railties/test/generators/job_generator_test.rb
index 4981ee999e..68d158eb39 100644
--- a/railties/test/generators/job_generator_test.rb
+++ b/railties/test/generators/job_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/job/job_generator"
 
diff --git a/railties/test/generators/mailer_generator_test.rb b/railties/test/generators/mailer_generator_test.rb
index 13c3956ae8..2ff03ea65e 100644
--- a/railties/test/generators/mailer_generator_test.rb
+++ b/railties/test/generators/mailer_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/mailer/mailer_generator"
 
diff --git a/railties/test/generators/migration_generator_test.rb b/railties/test/generators/migration_generator_test.rb
index 0a70be0677..6fe6e4ca07 100644
--- a/railties/test/generators/migration_generator_test.rb
+++ b/railties/test/generators/migration_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/migration/migration_generator"
 
diff --git a/railties/test/generators/model_generator_test.rb b/railties/test/generators/model_generator_test.rb
index 2a85f985ee..f41969fc46 100644
--- a/railties/test/generators/model_generator_test.rb
+++ b/railties/test/generators/model_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/model/model_generator"
 require "active_support/core_ext/string/strip"
diff --git a/railties/test/generators/named_base_test.rb b/railties/test/generators/named_base_test.rb
index d775faad36..3015b5363b 100644
--- a/railties/test/generators/named_base_test.rb
+++ b/railties/test/generators/named_base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/scaffold_controller/scaffold_controller_generator"
 
diff --git a/railties/test/generators/namespaced_generators_test.rb b/railties/test/generators/namespaced_generators_test.rb
index 7d63431436..1caabbe6b1 100644
--- a/railties/test/generators/namespaced_generators_test.rb
+++ b/railties/test/generators/namespaced_generators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/controller/controller_generator"
 require "rails/generators/rails/model/model_generator"
diff --git a/railties/test/generators/orm_test.rb b/railties/test/generators/orm_test.rb
index 35cfeeabf6..88ae930554 100644
--- a/railties/test/generators/orm_test.rb
+++ b/railties/test/generators/orm_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/scaffold_controller/scaffold_controller_generator"
 
diff --git a/railties/test/generators/plugin_generator_test.rb b/railties/test/generators/plugin_generator_test.rb
index 2aef4e6584..f8512f9157 100644
--- a/railties/test/generators/plugin_generator_test.rb
+++ b/railties/test/generators/plugin_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/plugin/plugin_generator"
 require "generators/shared_generator_tests"
diff --git a/railties/test/generators/plugin_test_helper.rb b/railties/test/generators/plugin_test_helper.rb
index 81768b890f..8ac90e3484 100644
--- a/railties/test/generators/plugin_test_helper.rb
+++ b/railties/test/generators/plugin_test_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "tmpdir"
 
diff --git a/railties/test/generators/plugin_test_runner_test.rb b/railties/test/generators/plugin_test_runner_test.rb
index 58f60404c4..0bdd2a77d2 100644
--- a/railties/test/generators/plugin_test_runner_test.rb
+++ b/railties/test/generators/plugin_test_runner_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/plugin_test_helper"
 
 class PluginTestRunnerTest < ActiveSupport::TestCase
diff --git a/railties/test/generators/resource_generator_test.rb b/railties/test/generators/resource_generator_test.rb
index 45b02e663d..e976e58180 100644
--- a/railties/test/generators/resource_generator_test.rb
+++ b/railties/test/generators/resource_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/resource/resource_generator"
 
diff --git a/railties/test/generators/scaffold_controller_generator_test.rb b/railties/test/generators/scaffold_controller_generator_test.rb
index ff510e9312..9971626f9f 100644
--- a/railties/test/generators/scaffold_controller_generator_test.rb
+++ b/railties/test/generators/scaffold_controller_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/scaffold_controller/scaffold_controller_generator"
 
diff --git a/railties/test/generators/scaffold_generator_test.rb b/railties/test/generators/scaffold_generator_test.rb
index 4956ca21b0..9926d58d16 100644
--- a/railties/test/generators/scaffold_generator_test.rb
+++ b/railties/test/generators/scaffold_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/scaffold/scaffold_generator"
 
diff --git a/railties/test/generators/shared_generator_tests.rb b/railties/test/generators/shared_generator_tests.rb
index 5fd0a6c7d1..5e75879964 100644
--- a/railties/test/generators/shared_generator_tests.rb
+++ b/railties/test/generators/shared_generator_tests.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 #
 # Tests, setup, and teardown common to the application and plugin generator suites.
 #
diff --git a/railties/test/generators/system_test_generator_test.rb b/railties/test/generators/system_test_generator_test.rb
index 03c1c78ef4..4622360244 100644
--- a/railties/test/generators/system_test_generator_test.rb
+++ b/railties/test/generators/system_test_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/system_test/system_test_generator"
 
diff --git a/railties/test/generators/task_generator_test.rb b/railties/test/generators/task_generator_test.rb
index 1896dc5c87..2285534bb9 100644
--- a/railties/test/generators/task_generator_test.rb
+++ b/railties/test/generators/task_generator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/task/task_generator"
 
diff --git a/railties/test/generators/test_runner_in_engine_test.rb b/railties/test/generators/test_runner_in_engine_test.rb
index 0a330ea4e9..680dc2608e 100644
--- a/railties/test/generators/test_runner_in_engine_test.rb
+++ b/railties/test/generators/test_runner_in_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/plugin_test_helper"
 
 class TestRunnerInEngineTest < ActiveSupport::TestCase
diff --git a/railties/test/generators_test.rb b/railties/test/generators_test.rb
index 766a50f6a0..e07627f36d 100644
--- a/railties/test/generators_test.rb
+++ b/railties/test/generators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "generators/generators_test_helper"
 require "rails/generators/rails/model/model_generator"
 require "rails/generators/test_unit/model/model_generator"
diff --git a/railties/test/initializable_test.rb b/railties/test/initializable_test.rb
index e942a983b6..4b67c91cc5 100644
--- a/railties/test/initializable_test.rb
+++ b/railties/test/initializable_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/initializable"
 
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index 2e910d1d17..7496b5f84a 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 # Note:
 # It is important to keep this file as light as possible
 # the goal for tests that require this is to test booting up
diff --git a/railties/test/json_params_parsing_test.rb b/railties/test/json_params_parsing_test.rb
index e2bd4a8230..7fff3bb465 100644
--- a/railties/test/json_params_parsing_test.rb
+++ b/railties/test/json_params_parsing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch"
 require "active_record"
diff --git a/railties/test/path_generation_test.rb b/railties/test/path_generation_test.rb
index 1f82ec3bbb..c0b03d0c15 100644
--- a/railties/test/path_generation_test.rb
+++ b/railties/test/path_generation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/with_options"
 require "active_support/core_ext/object/json"
diff --git a/railties/test/paths_test.rb b/railties/test/paths_test.rb
index 0ec21fc90e..f3db0a51d2 100644
--- a/railties/test/paths_test.rb
+++ b/railties/test/paths_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/paths"
 require "minitest/mock"
diff --git a/railties/test/rack_logger_test.rb b/railties/test/rack_logger_test.rb
index cd14cbe7a6..33b4bc6a3a 100644
--- a/railties/test/rack_logger_test.rb
+++ b/railties/test/rack_logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/testing/autorun"
 require "active_support/test_case"
diff --git a/railties/test/rails_info_controller_test.rb b/railties/test/rails_info_controller_test.rb
index bae87e6a1c..d795629ccd 100644
--- a/railties/test/rails_info_controller_test.rb
+++ b/railties/test/rails_info_controller_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionController
diff --git a/railties/test/rails_info_test.rb b/railties/test/rails_info_test.rb
index e29e3c828e..383adcc55d 100644
--- a/railties/test/rails_info_test.rb
+++ b/railties/test/rails_info_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 unless defined?(Rails) && defined?(Rails::Info)
diff --git a/railties/test/railties/engine_test.rb b/railties/test/railties/engine_test.rb
index 19d2a2e4f6..e382a7a873 100644
--- a/railties/test/railties/engine_test.rb
+++ b/railties/test/railties/engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 require "stringio"
 require "rack/test"
diff --git a/railties/test/railties/generators_test.rb b/railties/test/railties/generators_test.rb
index 22c2697577..5c691b9ec4 100644
--- a/railties/test/railties/generators_test.rb
+++ b/railties/test/railties/generators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 RAILS_ISOLATED_ENGINE = true
 require "isolation/abstract_unit"
 
diff --git a/railties/test/railties/mounted_engine_test.rb b/railties/test/railties/mounted_engine_test.rb
index b4efe50038..6639e55382 100644
--- a/railties/test/railties/mounted_engine_test.rb
+++ b/railties/test/railties/mounted_engine_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module ApplicationTests
diff --git a/railties/test/railties/railtie_test.rb b/railties/test/railties/railtie_test.rb
index be77af8134..30cd525266 100644
--- a/railties/test/railties/railtie_test.rb
+++ b/railties/test/railties/railtie_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "isolation/abstract_unit"
 
 module RailtiesTest
diff --git a/railties/test/secrets_test.rb b/railties/test/secrets_test.rb
index 030303525b..36c8ef1fd9 100644
--- a/railties/test/secrets_test.rb
+++ b/railties/test/secrets_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "isolation/abstract_unit"
 require "rails/generators"
diff --git a/railties/test/test_unit/reporter_test.rb b/railties/test/test_unit/reporter_test.rb
index dc462fe0f4..98201394cd 100644
--- a/railties/test/test_unit/reporter_test.rb
+++ b/railties/test/test_unit/reporter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 require "rails/test_unit/reporter"
 require "minitest/mock"
diff --git a/railties/test/version_test.rb b/railties/test/version_test.rb
index 393da344a1..86a482e091 100644
--- a/railties/test/version_test.rb
+++ b/railties/test/version_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 require "abstract_unit"
 
 class VersionTest < ActiveSupport::TestCase
diff --git a/tasks/release.rb b/tasks/release.rb
index 38689a5799..038fdc584a 100644
--- a/tasks/release.rb
+++ b/tasks/release.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 FRAMEWORKS = %w( activesupport activemodel activerecord actionview actionpack activejob actionmailer actioncable railties )
 FRAMEWORK_NAMES = Hash.new { |h, k| k.split(/(?<=active|action)/).map(&:capitalize).join(" ") }
 
diff --git a/tools/console b/tools/console
index ff52308a90..58c76fb1b6 100755
--- a/tools/console
+++ b/tools/console
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 require "bundler"
 Bundler.setup
 
diff --git a/tools/profile b/tools/profile
index ccbd8cfa46..01e513c67a 100755
--- a/tools/profile
+++ b/tools/profile
@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
-# frozen_string_literal: true
 # Profile require calls giving information about the time and the files that are called
 # when loading the provided file.
 #
diff --git a/tools/test.rb b/tools/test.rb
index 189997229b..52e9c19198 100644
--- a/tools/test.rb
+++ b/tools/test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 $: << File.expand_path("test", COMPONENT_ROOT)
 
 require "bundler"
diff --git a/version.rb b/version.rb
index 68af9946e5..7bacf2e0ba 100644
--- a/version.rb
+++ b/version.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
 module Rails
   # Returns the version of the currently loaded Rails as a <tt>Gem::Version</tt>
   def self.gem_version