diff --git a/content/media/test/test_mediarecorder_record_immediate_stop.html b/content/media/test/test_mediarecorder_record_immediate_stop.html
index 1327f1acd73c..0f51fe300ed0 100644
--- a/content/media/test/test_mediarecorder_record_immediate_stop.html
+++ b/content/media/test/test_mediarecorder_record_immediate_stop.html
@@ -97,9 +97,9 @@ function startTest(test, token) {
 
   // This handler completes a start and stop of recording and verifies
   // respective media recorder state.
-  var canPlayThrough = function() {
-    element.removeEventListener('canplaythrough', canPlayThrough, false);
-
+  element.onloadedmetadata = function () {
+    element.onloadedmetadata = null;
+    element.play();
     mediaRecorder.start();
     is(mediaRecorder.state, 'recording', 'Media recorder should be recording');
     is(mediaRecorder.stream, element.stream,
@@ -112,8 +112,7 @@ function startTest(test, token) {
        'Media recorder stream = element stream post recording');
   };
 
-  element.addEventListener('canplaythrough', canPlayThrough, false);
-  element.play();
+  element.preload = "metadata";
 }
 
 manager.runTests(gMediaRecorderTests, startTest);
diff --git a/content/media/test/test_mediarecorder_record_no_timeslice.html b/content/media/test/test_mediarecorder_record_no_timeslice.html
index 5d0270e013de..67321ceb4efc 100644
--- a/content/media/test/test_mediarecorder_record_no_timeslice.html
+++ b/content/media/test/test_mediarecorder_record_no_timeslice.html
@@ -84,24 +84,18 @@ function startTest(test, token) {
     }
   };
 
-  element.oncanplaythrough = function () {
-    element.oncanplaythrough = null;
-    // If content has ended, skip the test
-    if (element.ended) {
-      ok(true, 'ended fired before canplaythrough, skipping test');
-      manager.finished(token);
-    } else {
-      // If content hasn't ended, start recording
-      mediaRecorder.start();
-      is(mediaRecorder.state, 'recording',
-         'Media recorder should be recording');
-      is(mediaRecorder.stream, element.stream,
-         'Media recorder stream = element stream at the start of recording');
-      // Recording will automatically stop when the stream ends.
-    }
-  }
+  element.preload = "metadata";
 
-  element.play();
+  element.onloadedmetadata = function () {
+    element.onloadedmetadata = null;
+    mediaRecorder.start();
+    is(mediaRecorder.state, 'recording',
+     'Media recorder should be recording');
+    is(mediaRecorder.stream, element.stream,
+     'Media recorder stream = element stream at the start of recording');
+
+    element.play();
+  }
 }
 
 manager.runTests(gMediaRecorderTests, startTest);
diff --git a/content/media/test/test_mediarecorder_record_session.html b/content/media/test/test_mediarecorder_record_session.html
index a4b4a4b7a8ed..3c179ced020e 100644
--- a/content/media/test/test_mediarecorder_record_session.html
+++ b/content/media/test/test_mediarecorder_record_session.html
@@ -54,15 +54,17 @@ function startTest(test, token) {
     ok(false, 'Unexpected warning fired');
   }
 
-  element.oncanplaythrough = function () {
-    element.oncanplaythrough = null;
+  element.preload = "metadata";
+
+  element.onloadedmetadata = function () {
+    element.onloadedmetadata = null;
+    element.play();
     for (var i = 0; i < mExpectStopCount; i++) {
       mediaRecorder.start(1000);
       mediaRecorder.stop();
     }
   }
 
-  element.play();
 }
 
 manager.runTests(gMediaRecorderTests, startTest);