diff --git a/lib/websocket.js b/lib/websocket.js
index c21a4ad68..cb8077de5 100644
--- a/lib/websocket.js
+++ b/lib/websocket.js
@@ -125,9 +125,6 @@ class WebSocket extends EventEmitter {
     return undefined;
   }
 
-  /* istanbul ignore next */
-  set onclose(listener) {}
-
   /**
    * @type {Function}
    */
@@ -136,9 +133,6 @@ class WebSocket extends EventEmitter {
     return undefined;
   }
 
-  /* istanbul ignore next */
-  set onerror(listener) {}
-
   /**
    * @type {Function}
    */
@@ -147,9 +141,6 @@ class WebSocket extends EventEmitter {
     return undefined;
   }
 
-  /* istanbul ignore next */
-  set onopen(listener) {}
-
   /**
    * @type {Function}
    */
@@ -158,9 +149,6 @@ class WebSocket extends EventEmitter {
     return undefined;
   }
 
-  /* istanbul ignore next */
-  set onmessage(listener) {}
-
   /**
    * @type {String}
    */