diff --git a/actionpack/lib/action_dispatch/testing/performance_test.rb b/actionpack/lib/action_dispatch/testing/performance_test.rb
index <HASH>..<HASH> 100644
--- a/actionpack/lib/action_dispatch/testing/performance_test.rb
+++ b/actionpack/lib/action_dispatch/testing/performance_test.rb
@@ -1,5 +1,4 @@
 require 'active_support/testing/performance'
-require 'active_support/testing/default'
 
 begin
   module ActionDispatch
Remove this require since active_support/testing/default doesn't exist anymore