diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index 5c8b09099c..8b6b2056a0 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -22,6 +22,7 @@ require "action_view/testing/resolvers"
 require "action_dispatch"
 require "active_support/dependencies"
 require "active_model"
+require "zeitwerk"
 
 module Rails
   class << self
@@ -159,16 +160,12 @@ class ActionDispatch::IntegrationTest < ActiveSupport::TestCase
 
   def with_autoload_path(path)
     path = File.join(__dir__, "fixtures", path)
-    if ActiveSupport::Dependencies.autoload_paths.include?(path)
+    Zeitwerk.with_loader do |loader|
+      loader.push_dir(path)
+      loader.setup
       yield
-    else
-      begin
-        ActiveSupport::Dependencies.autoload_paths << path
-        yield
-      ensure
-        ActiveSupport::Dependencies.autoload_paths.reject! { |p| p == path }
-        ActiveSupport::Dependencies.clear
-      end
+    ensure
+      loader.unload
     end
   end
 end
diff --git a/actionpack/test/controller/live_stream_test.rb b/actionpack/test/controller/live_stream_test.rb
index 2f7606255c..a9c7323655 100644
--- a/actionpack/test/controller/live_stream_test.rb
+++ b/actionpack/test/controller/live_stream_test.rb
@@ -3,6 +3,8 @@
 require "abstract_unit"
 require "timeout"
 require "concurrent/atomic/count_down_latch"
+require "zeitwerk"
+
 Thread.abort_on_exception = true
 
 module ActionController
@@ -173,18 +175,22 @@ module ActionController
 
       def write_sleep_autoload
         path = File.expand_path("../fixtures", __dir__)
-        ActiveSupport::Dependencies.autoload_paths << path
+        Zeitwerk.with_loader do |loader|
+          loader.push_dir(path)
+          loader.ignore(File.join(path, "公共"))
+          loader.setup
 
-        response.headers["Content-Type"] = "text/event-stream"
-        response.stream.write "before load"
-        sleep 0.01
-        silence_warnings do
-          ::LoadMe
+          response.headers["Content-Type"] = "text/event-stream"
+          response.stream.write "before load"
+          sleep 0.01
+          silence_warnings do
+            ::LoadMe
+          end
+          response.stream.close
+          latch.count_down
+        ensure
+          loader.unload
         end
-        response.stream.close
-        latch.count_down
-
-        ActiveSupport::Dependencies.autoload_paths.reject! { |p| p == path }
       end
 
       def thread_locals
diff --git a/actionpack/test/dispatch/session/cache_store_test.rb b/actionpack/test/dispatch/session/cache_store_test.rb
index 205a1ae75d..9677d177d0 100644
--- a/actionpack/test/dispatch/session/cache_store_test.rb
+++ b/actionpack/test/dispatch/session/cache_store_test.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require "abstract_unit"
-require "fixtures/session_autoload_test/session_autoload_test/foo"
 
 class CacheStoreTest < ActionDispatch::IntegrationTest
   class TestController < ActionController::Base