diff --git a/.rubocop.yml b/.rubocop.yml
index eb410376fe2b2d2ea0ada1de30a000473a1edbbe..8981f023b42b4a163149789c7e30fd8f6316b7cd 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -9,6 +9,7 @@ AllCops:
     - '**/templates/**/*'
     - '**/vendor/**/*'
     - 'actionpack/lib/action_dispatch/journey/parser.rb'
+    - 'railties/test/fixtures/tmp/**/*'
 
 # Prefer assert_not_x over refute_x
 CustomCops/RefuteNot: