diff --git a/lib/start-server.js b/lib/start-server.js
index 2777a72deb..4475ebb839 100755
--- a/lib/start-server.js
+++ b/lib/start-server.js
@@ -45,4 +45,8 @@ tcpPortUsed.check(port, 'localhost').then(function(inUse) {
     const server = require('./server/server.js');
     server(port);
   }
+}).catch(function(ex) {
+  setTimeout(function() {
+    throw ex;
+  }, 0);
 });