diff --git a/worker.js b/worker.js
index <HASH>..<HASH> 100644
--- a/worker.js
+++ b/worker.js
@@ -105,7 +105,6 @@ function test(ctx, cb) {
 
   check({url:"http://localhost:"+HTTP_PORT+"/", log:log}, function(err) {
     if (err) {
-      clearInterval(intervalId)
       return cb(1)
     }
     serverUp()
don't need to clear interval in error path anymore.