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-rw-r--r--test/rackup/config.ru2
1 files changed, 2 insertions, 0 deletions
diff --git a/test/rackup/config.ru b/test/rackup/config.ru
index f1e2e1f3..fa9b6eca 100644
--- a/test/rackup/config.ru
+++ b/test/rackup/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "#{File.dirname(__FILE__)}/../testrequest"
 
 $stderr = File.open("#{File.dirname(__FILE__)}/log_output", "w")