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-rw-r--r--actioncable/test/test_helper.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actioncable/test/test_helper.rb b/actioncable/test/test_helper.rb
index 5d246c2b76..b9d407fb6d 100644
--- a/actioncable/test/test_helper.rb
+++ b/actioncable/test/test_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "action_cable"
require "active_support/testing/autorun"