diff --git a/.rubocop.yml b/.rubocop.yml
index eb410376fe..8981f023b4 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: