--- a/dom/media/test/test_buffered.html
+++ b/dom/media/test/test_buffered.html
@@ -90,17 +90,16 @@ function fetch(url, fetched_callback) {
 }
 
 function startTest(test, token) {
   // Fetch the media resource using XHR so we can be sure the entire
   // resource is loaded before we test buffered ranges. This ensures
   // we have deterministic behaviour.
   var onfetched = function(uri) {
     var v = document.createElement('video');
-    v.autoplay = true;
     v._token = token;
     v.src = uri;
     v._name = test.name;
     v._test = test;
     v.addEventListener("loadeddata", testBuffered, {once: true});
     document.body.appendChild(v);
   };