test: updates

Author: snitin315

lib/Server.js

@@ -751,7 +751,10 @@ class Server {
   }
 
   listen(port, hostname, fn) {
-    if (typeof hostname !== 'undefined' && hostname !== this.options.host) {
+    if (
+      typeof this.options.host !== 'undefined' &&
+      hostname !== this.options.host
+    ) {
       throw new Error(
         'The host specified in options is different from the host passed as an argument.'
       );