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-rw-r--r--actionpack/lib/action_dispatch/testing/integration.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index beba4e3c36..ae1f368e8b 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "stringio"
require "uri"
require "active_support/core_ext/kernel/singleton_class"