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-rw-r--r--test/lib/test/unit.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/lib/test/unit.rb b/test/lib/test/unit.rb
index d886f29c73..85e6d76f3d 100644
--- a/test/lib/test/unit.rb
+++ b/test/lib/test/unit.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
gem 'minitest', '< 5.0.0' if defined? Gem
rescue Gem::LoadError