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-rw-r--r--railties/test/application/middleware/cache_test.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/test/application/middleware/cache_test.rb b/railties/test/application/middleware/cache_test.rb
index 93b5263bf7..05f4317ad3 100644
--- a/railties/test/application/middleware/cache_test.rb
+++ b/railties/test/application/middleware/cache_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "isolation/abstract_unit"
module ApplicationTests