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-rw-r--r--railties/test/configuration/middleware_stack_proxy_test.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/test/configuration/middleware_stack_proxy_test.rb b/railties/test/configuration/middleware_stack_proxy_test.rb
index 559ce72693..bc72b7f0c9 100644
--- a/railties/test/configuration/middleware_stack_proxy_test.rb
+++ b/railties/test/configuration/middleware_stack_proxy_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "active_support"
require "active_support/testing/autorun"
require "rails/configuration"