--- a/dom/media/tests/mochitest/test_getUserMedia_mediaElementCapture_audio.html
+++ b/dom/media/tests/mochitest/test_getUserMedia_mediaElementCapture_audio.html
@@ -11,17 +11,17 @@ createHTML({
   bug: "1259788",
   title: "Test CaptureStream audio content on HTMLMediaElement playing a gUM MediaStream",
   visible: true
 });
 
 var audioContext;
 var gUMAudioElement;
 var analyser;
-runTest(() => getUserMedia({audio: true})
+runTest(() => getUserMedia({audio: { echoCancellation: false }})
   .then(stream => {
     gUMAudioElement = createMediaElement("audio", "gUMAudio");
     gUMAudioElement.srcObject = stream;
 
     audioContext = new AudioContext();
     info("Capturing");
 
     analyser = new AudioStreamAnalyser(audioContext,