diff --git a/test/action_controller/serialization_test.rb b/test/action_controller/serialization_test.rb
index c558e768..8c89ceac 100644
--- a/test/action_controller/serialization_test.rb
+++ b/test/action_controller/serialization_test.rb
@@ -406,7 +406,7 @@ module ActionController
           end
         }.new
         assert_match /adapter: false/, (capture(:stderr) {
-          controller.get_serializer(@profile)
+          controller.get_serializer(Profile.new)
         })
       end
 
@@ -417,7 +417,7 @@ module ActionController
           end
         }.new
         assert_equal "", (capture(:stderr) {
-          controller.get_serializer(@profile)
+          controller.get_serializer(Profile.new)
         })
       end
     end