diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index 40a9aa2783..57592d368f 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -14,7 +14,7 @@ module ActiveRecord
   # \Fixtures are a way of organizing data that you want to test against; in short, sample data.
   #
   # They are stored in YAML files, one file per model, which are placed in the directory
-  # appointed by <tt>ActiveSupport::TestCase.fixture_path=(path)</tt> (this is automatically
+  # appointed by <tt>ActiveRecord::TestCase.fixture_path=(path)</tt> (this is automatically
   # configured for Rails, so you can just put your files in <tt><your-rails-app>/test/fixtures/</tt>).
   # The fixture file ends with the +.yml+ file extension, for example:
   # <tt><your-rails-app>/test/fixtures/web_sites.yml</tt>).
@@ -57,7 +57,7 @@ module ActiveRecord
   #
   #   require 'test_helper'
   #
-  #   class WebSiteTest < ActiveSupport::TestCase
+  #   class WebSiteTest < ActiveRecord::TestCase
   #     test "web_site_count" do
   #       assert_equal 2, WebSite.count
   #     end
@@ -89,7 +89,7 @@ module ActiveRecord
   #   end
   #
   # In order to use these methods to access fixtured data within your testcases, you must specify one of the
-  # following in your ActiveSupport::TestCase-derived class:
+  # following in your ActiveRecord::TestCase-derived class:
   #
   # - to fully enable instantiated fixtures (enable alternate methods #1 and #2 above)
   #     self.use_instantiated_fixtures = true
@@ -144,7 +144,7 @@ module ActiveRecord
   # Test cases can use begin+rollback to isolate their changes to the database instead of having to
   # delete+insert for every test case.
   #
-  #   class FooTest < ActiveSupport::TestCase
+  #   class FooTest < ActiveRecord::TestCase
   #     self.use_transactional_tests = true
   #
   #     test "godzilla" do
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index ebd4437a87..f1d69a215a 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -1,7 +1,5 @@
 require "config"
 
-require "active_support/testing/autorun"
-require "active_support/testing/method_call_assertions"
 require "stringio"
 
 require "active_record"
@@ -134,21 +132,6 @@ def disable_extension!(extension, connection)
   connection.reconnect!
 end
 
-require "cases/validations_repair_helper"
-class ActiveSupport::TestCase
-  include ActiveRecord::TestFixtures
-  include ActiveRecord::ValidationsRepairHelper
-  include ActiveSupport::Testing::MethodCallAssertions
-
-  self.fixture_path = FIXTURES_ROOT
-  self.use_instantiated_fixtures  = false
-  self.use_transactional_tests = true
-
-  def create_fixtures(*fixture_set_names, &block)
-    ActiveRecord::FixtureSet.create_fixtures(ActiveSupport::TestCase.fixture_path, fixture_set_names, fixture_class_names, &block)
-  end
-end
-
 def load_schema
   # silence verbose schema loading
   original_stdout = $stdout
diff --git a/activerecord/test/cases/test_case.rb b/activerecord/test/cases/test_case.rb
index b4f5226f2b..7e8746b4f7 100644
--- a/activerecord/test/cases/test_case.rb
+++ b/activerecord/test/cases/test_case.rb
@@ -1,13 +1,29 @@
 require "active_support/test_case"
+require "active_support/testing/autorun"
+require "active_support/testing/method_call_assertions"
 require "active_support/testing/stream"
 require "active_support/core_ext/regexp"
+require "active_record/fixtures"
+
+require "cases/validations_repair_helper"
 
 module ActiveRecord
   # = Active Record Test Case
   #
   # Defines some test assertions to test against SQL queries.
   class TestCase < ActiveSupport::TestCase #:nodoc:
+    include ActiveSupport::Testing::MethodCallAssertions
     include ActiveSupport::Testing::Stream
+    include ActiveRecord::TestFixtures
+    include ActiveRecord::ValidationsRepairHelper
+
+    self.fixture_path = FIXTURES_ROOT
+    self.use_instantiated_fixtures = false
+    self.use_transactional_tests = true
+
+    def create_fixtures(*fixture_set_names, &block)
+      ActiveRecord::FixtureSet.create_fixtures(ActiveRecord::TestCase.fixture_path, fixture_set_names, fixture_class_names, &block)
+    end
 
     def teardown
       SQLCounter.clear_log