diff --git a/test/cast/cast_utils_unit.js b/test/cast/cast_utils_unit.js
index ff954fc45b..994f09b47e 100644
--- a/test/cast/cast_utils_unit.js
+++ b/test/cast/cast_utils_unit.js
@@ -29,6 +29,7 @@ describe('CastUtils', () => {
       'createPlayhead',
       'createMediaSourceEngine',
       'createStreamingEngine',
+      'disableStream',
     ];
 
     const castMembers = CastUtils.PlayerVoidMethods