1 files changed, 1 insertions, 0 deletions
diff --git a/t/pid.ru b/t/pid.ru
index f5fd31f..b49b137 100644
--- a/t/pid.ru
+++ b/t/pid.ru
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
  use Rack::ContentLength
  use Rack::ContentType, "text/plain"
  run lambda { |env| [ 200, {}, [ "#$$\n" ] ] }