diff --git a/test/create-websocket-stream.test.js b/test/create-websocket-stream.test.js
index 0a83a45ea..54a13c6c8 100644
--- a/test/create-websocket-stream.test.js
+++ b/test/create-websocket-stream.test.js
@@ -604,7 +604,7 @@ describe('createWebSocketStream', () => {
       });
 
       wss.on('connection', (ws) => {
-        ws.send(randomBytes(16 * 1024));
+        ws.send(randomBytes(highWaterMark));
       });
     });
   });