diff --git a/dom/media/test/test_buffered.html b/dom/media/test/test_buffered.html
index 297c365291e1..7a9d8dd942e5 100644
--- a/dom/media/test/test_buffered.html
+++ b/dom/media/test/test_buffered.html
@@ -14,7 +14,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=462957
 
 <p id="display"></p>
 <div id="content" style="display: none">
-  
+
 </div>
 <pre id="test">
 <script type="application/javascript">
@@ -25,8 +25,7 @@ var manager = new MediaTestManager;
 
 function testBuffered(e) {
   var v = e.target;
-  v.removeEventListener('timeupdate', testBuffered);
-  
+
   // The whole media should be buffered...
   var b = v.buffered;
   is(b.length, 1, v._name + ": Should be buffered in one range");
@@ -41,7 +40,7 @@ function testBuffered(e) {
     caught = e.name == "IndexSizeError" && e.code == DOMException.INDEX_SIZE_ERR;
   }
   is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on under start bounds range");
-  
+
   caught = false;
   try {
     b.end(-1);
@@ -57,7 +56,7 @@ function testBuffered(e) {
     caught = e.name == "IndexSizeError" && e.code == DOMException.INDEX_SIZE_ERR;
   }
   is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on over start bounds range");
-  
+
   caught = false;
   try {
     b.end(b.length);
@@ -100,7 +99,7 @@ function startTest(test, token) {
     v.src = uri;
     v._name = test.name;
     v._test = test;
-    v.addEventListener("timeupdate", testBuffered);
+    v.addEventListener("timeupdate", testBuffered, {once: true});
     document.body.appendChild(v);
   };