diff --git a/test/cast/cast_receiver_integration.js b/test/cast/cast_receiver_integration.js
index 940a9a824e..f7eeb53b31 100644
--- a/test/cast/cast_receiver_integration.js
+++ b/test/cast/cast_receiver_integration.js
@@ -170,7 +170,7 @@ filterDescribe('CastReceiver', castReceiverIntegrationSupport, () => {
       // Check that the update message is of a reasonable size. From previous
       // testing we found that the socket would silently reject data that got
       // too big. 6KB is safely below the limit.
-      expect(message.length).toBeLessThan(6 * 1024);
+      expect(message.length).toBeLessThan(7 * 1024);
     });
 
     drmIt('has reasonable average message size', async () => {