--- a/testing/web-platform/tests/mediacapture-streams/MediaStreamTrack-end-manual.https.html
+++ b/testing/web-platform/tests/mediacapture-streams/MediaStreamTrack-end-manual.https.html
@@ -22,20 +22,29 @@ promise_test(async t => {
   const stream = await navigator.mediaDevices.getUserMedia({
     audio: true,
     video: true,
   });
 
   const vidTrack = stream.getVideoTracks()[0];
   assert_equals(vidTrack.readyState, "live",
     "The video track object is in live state");
+  const vidEnded = new Promise(r => vidTrack.onended = r);
   const audTrack = stream.getAudioTracks()[0];
   assert_equals(audTrack.readyState, "live",
     "The audio track object is in live state");
+  const audEnded = new Promise(r => audTrack.onended = r);
 
-  await new Promise(r => vidTrack.onended = r);
+  await Promise.race([vidEnded, audEnded]);
+  assert_equals(stream.getTracks().filter(t => t.readyState == "ended").length,
+    1, "Only one track is ended after first track's ended event");
+  assert_equals(stream.getTracks().filter(t => t.readyState == "live").length,
+    1, "One track is still live after first track's ended event");
+  assert_true(stream.active, "MediaStream is still active");
+
+  await Promise.all([vidEnded, audEnded]);
   assert_equals(vidTrack.readyState, "ended", "Video track ended as expected");
   assert_equals(audTrack.readyState, "ended", "Audio track ended as expected");
   assert_false(stream.active, "MediaStream has become inactive as expected");
 }, "Tests that MediaStreamTracks end properly on permission revocation");
 </script>
 </body>
 </html>