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-rw-r--r--test/unit/attachment_test.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/test/unit/attachment_test.rb b/test/unit/attachment_test.rb
index 56a4ea1dd8..728742c366 100644
--- a/test/unit/attachment_test.rb
+++ b/test/unit/attachment_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require 'test_helper'
class ActionText::AttachmentTest < ActiveSupport::TestCase