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-rw-r--r--actioncable/test/subscription_adapter/async_test.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actioncable/test/subscription_adapter/async_test.rb b/actioncable/test/subscription_adapter/async_test.rb
index 8a447c7a4f..0b5bfb2fa9 100644
--- a/actioncable/test/subscription_adapter/async_test.rb
+++ b/actioncable/test/subscription_adapter/async_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "test_helper"
require_relative "common"