diff --git a/actionpack/test/controller/request_forgery_protection_test.rb b/actionpack/test/controller/request_forgery_protection_test.rb
index 8d4b76849f824..7b722bd3d75cf 100644
--- a/actionpack/test/controller/request_forgery_protection_test.rb
+++ b/actionpack/test/controller/request_forgery_protection_test.rb
@@ -112,7 +112,7 @@ def test_should_render_form_without_token_tag_if_remote
     assert_not_blocked do
       get :form_for_remote
     end
-    assert_no_match /authenticity_token/, response.body
+    assert_no_match(/authenticity_token/, response.body)
   end
 
   def test_should_render_form_with_token_tag_if_remote_and_authenticity_token_requested