diff --git a/actionpack/test/controller/helper_test.rb b/actionpack/test/controller/helper_test.rb
index 12539739aa..b9be163904 100644
--- a/actionpack/test/controller/helper_test.rb
+++ b/actionpack/test/controller/helper_test.rb
@@ -3,12 +3,6 @@ require 'active_support/core_ext/kernel/reporting'
 
 ActionController::Base.helpers_dir = File.dirname(__FILE__) + '/../fixtures/helpers'
 
-class TestController < ActionController::Base
-  attr_accessor :delegate_attr
-  def delegate_method() end
-  def rescue_action(e) raise end
-end
-
 module Fun
   class GamesController < ActionController::Base
     def render_hello_world
@@ -38,6 +32,12 @@ module LocalAbcHelper
 end
 
 class HelperTest < Test::Unit::TestCase
+  class TestController < ActionController::Base
+    attr_accessor :delegate_attr
+    def delegate_method() end
+    def rescue_action(e) raise end
+  end
+
   def setup
     # Increment symbol counter.
     @symbol = (@@counter ||= 'A0').succ!.dup
diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb
index ac8dad7c42..b32325fa20 100644
--- a/actionpack/test/controller/render_test.rb
+++ b/actionpack/test/controller/render_test.rb
@@ -860,7 +860,7 @@ class RenderTest < ActionController::TestCase
   # :ported:
   def test_access_to_controller_name_in_view
     get :accessing_controller_name_in_template
-    assert_equal "test", @response.body # name is explicitly set to 'test' inside the controller.
+    assert_equal "test", @response.body # name is explicitly set in the controller.
   end
 
   # :ported:
diff --git a/actionpack/test/controller/rescue_test.rb b/actionpack/test/controller/rescue_test.rb
index 2b1f532b8d..37367eaafc 100644
--- a/actionpack/test/controller/rescue_test.rb
+++ b/actionpack/test/controller/rescue_test.rb
@@ -343,9 +343,9 @@ class RescueTest < ActionController::IntegrationTest
     def with_test_routing
       with_routing do |set|
         set.draw do |map|
-          match 'foo', :to => TestController.action(:foo)
-          match 'invalid', :to => TestController.action(:invalid)
-          match 'b00m', :to => TestController.action(:b00m)
+          match 'foo', :to => ::RescueTest::TestController.action(:foo)
+          match 'invalid', :to => ::RescueTest::TestController.action(:invalid)
+          match 'b00m', :to => ::RescueTest::TestController.action(:b00m)
         end
         yield
       end
diff --git a/actionpack/test/controller/verification_test.rb b/actionpack/test/controller/verification_test.rb
index 63e8cf3e61..11d0d10897 100644
--- a/actionpack/test/controller/verification_test.rb
+++ b/actionpack/test/controller/verification_test.rb
@@ -126,7 +126,7 @@ class VerificationTest < ActionController::TestCase
       with_routing do |set|
         set.draw do |map|
           match 'foo', :to => 'test#foo', :as => :foo
-          match 'verification_test/:action', :to => TestController
+          match 'verification_test/:action', :to => ::VerificationTest::TestController
         end
         get :guarded_one_for_named_route_test, :two => "not one"
         assert_redirected_to '/foo'
diff --git a/actionpack/test/dispatch/request/json_params_parsing_test.rb b/actionpack/test/dispatch/request/json_params_parsing_test.rb
index 3c2408de5f..d3308f73cc 100644
--- a/actionpack/test/dispatch/request/json_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/json_params_parsing_test.rb
@@ -57,7 +57,7 @@ class JsonParamsParsingTest < ActionController::IntegrationTest
     def with_test_routing
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::JsonParamsParsingTest::TestController
         end
         yield
       end
diff --git a/actionpack/test/dispatch/request/query_string_parsing_test.rb b/actionpack/test/dispatch/request/query_string_parsing_test.rb
index b764478d87..071d80c5b0 100644
--- a/actionpack/test/dispatch/request/query_string_parsing_test.rb
+++ b/actionpack/test/dispatch/request/query_string_parsing_test.rb
@@ -109,12 +109,12 @@ class QueryStringParsingTest < ActionController::IntegrationTest
     def assert_parses(expected, actual)
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::QueryStringParsingTest::TestController
         end
 
         get "/parse", actual
         assert_response :ok
-        assert_equal(expected, TestController.last_query_parameters)
+        assert_equal(expected, ::QueryStringParsingTest::TestController.last_query_parameters)
       end
     end
 end
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 e98a49980e..69dbd7f528 100644
--- a/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
@@ -130,7 +130,7 @@ class UrlEncodedParamsParsingTest < ActionController::IntegrationTest
     def with_test_routing
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::UrlEncodedParamsParsingTest::TestController
         end
         yield
       end
diff --git a/actionpack/test/dispatch/request/xml_params_parsing_test.rb b/actionpack/test/dispatch/request/xml_params_parsing_test.rb
index 0dc47ed9d5..96189e4ca2 100644
--- a/actionpack/test/dispatch/request/xml_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/xml_params_parsing_test.rb
@@ -84,7 +84,7 @@ class XmlParamsParsingTest < ActionController::IntegrationTest
     def with_test_routing
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::XmlParamsParsingTest::TestController
         end
         yield
       end
@@ -100,4 +100,4 @@ class LegacyXmlParamsParsingTest < XmlParamsParsingTest
     def default_headers
       {'HTTP_X_POST_DATA_FORMAT' => 'xml'}
     end
-end
\ No newline at end of file
+end
diff --git a/actionpack/test/dispatch/session/cookie_store_test.rb b/actionpack/test/dispatch/session/cookie_store_test.rb
index edfc303d3d..ab7b9bc31b 100644
--- a/actionpack/test/dispatch/session/cookie_store_test.rb
+++ b/actionpack/test/dispatch/session/cookie_store_test.rb
@@ -219,7 +219,7 @@ class CookieStoreTest < ActionController::IntegrationTest
     def with_test_route_set(options = {})
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::CookieStoreTest::TestController
         end
         options = {:key => SessionKey, :secret => SessionSecret}.merge(options)
         @app = ActionDispatch::Session::CookieStore.new(set, options)
diff --git a/actionpack/test/dispatch/session/mem_cache_store_test.rb b/actionpack/test/dispatch/session/mem_cache_store_test.rb
index afc9d91d50..5a1dcb4dab 100644
--- a/actionpack/test/dispatch/session/mem_cache_store_test.rb
+++ b/actionpack/test/dispatch/session/mem_cache_store_test.rb
@@ -112,7 +112,7 @@ class MemCacheStoreTest < ActionController::IntegrationTest
     def with_test_route_set
       with_routing do |set|
         set.draw do |map|
-          match ':action', :to => TestController
+          match ':action', :to => ::MemCacheStoreTest::TestController
         end
         @app = ActionDispatch::Session::MemCacheStore.new(set, :key => '_session_id')
         yield