diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 6b19acb482..0ffe8a87a8 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -274,19 +274,13 @@ def index
         app.config.session_store :disabled
       end
 
-      class ::OmgController < ActionController::Base
-        def index
-          render text: Rails.application.message_verifier.generate("some_value")
-        end
-      end
+      message = app.message_verifier.generate("some_value")
 
-      get "/"
-
-      assert_equal 'some_value', Rails.application.message_verifier.verify(last_response.body)
+      assert_equal 'some_value', Rails.application.message_verifier.verify(message)
 
       secret = app.key_generator.generate_key('default')
       verifier = ActiveSupport::MessageVerifier.new(secret)
-      assert_equal 'some_value', verifier.verify(last_response.body)
+      assert_equal 'some_value', verifier.verify(message)
     end
 
     test "application verifier can build different verifiers" do