diff --git a/actionpack/test/controller/log_subscriber_test.rb b/actionpack/test/controller/log_subscriber_test.rb
index 4ae1b20d43..ccbf336acf 100644
--- a/actionpack/test/controller/log_subscriber_test.rb
+++ b/actionpack/test/controller/log_subscriber_test.rb
@@ -170,7 +170,7 @@ class ACLogSubscriberTest < ActionController::TestCase
   def test_process_action_with_view_runtime
     get :show
     wait
-    assert_match /Completed 200 OK in [\d]ms/, logs[1]
+    assert_match(/Completed 200 OK in [\d]ms/, logs[1])
   end
 
   def test_append_info_to_payload_is_called_even_with_exception