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-rw-r--r--test/psych/test_yamlstore.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/psych/test_yamlstore.rb b/test/psych/test_yamlstore.rb
index 94f1330d37..a9ce652ced 100644
--- a/test/psych/test_yamlstore.rb
+++ b/test/psych/test_yamlstore.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'yaml/store'
require 'tmpdir'