diff --git a/test/test_tmpdir.rb b/test/test_tmpdir.rb
index 4fc4bca4d5..691d52f3cb 100644
--- a/test/test_tmpdir.rb
+++ b/test/test_tmpdir.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'tmpdir'