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-rw-r--r--activesupport/test/message_encryptor_test.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/test/message_encryptor_test.rb b/activesupport/test/message_encryptor_test.rb
index 4c3515b5e1..33ab7620da 100644
--- a/activesupport/test/message_encryptor_test.rb
+++ b/activesupport/test/message_encryptor_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "abstract_unit"
require "openssl"
require "active_support/time"