diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 8f2e6e9ac0..30748674cd 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -479,7 +479,7 @@ module ApplicationTests
       RUBY
 
       add_to_config <<-RUBY
-        routes.append do
+        routes.prepend do
           resources :posts
         end
       RUBY