diff --git a/lib/utils/ws-requestor.js b/lib/utils/ws-requestor.js
index 5491d563..f1af61dd 100644
--- a/lib/utils/ws-requestor.js
+++ b/lib/utils/ws-requestor.js
@@ -170,7 +170,6 @@ class WsRequestor extends BaseRequestor {
   }
 
   _onClose() {
-    assert(this.ws);
     this.logger.info({url: this.url}, 'WsRequestor - socket closed unexpectedly from remote side');
     this.emit('socket-closed');
   }