diff --git a/test/test_helper.rb b/test/test_helper.rb
index 0d86646d..4f0d1488 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -82,6 +82,7 @@ def signal_process(pid, signal, wait: nil)
       Thread.new do
         sleep(wait) if wait
         Process.kill(signal, pid)
+      rescue Errno::ESRCH
       end
     end