diff --git a/content/media/webaudio/test/mochitest.ini b/content/media/webaudio/test/mochitest.ini
index e66d5661f83c..6ff49664d344 100644
--- a/content/media/webaudio/test/mochitest.ini
+++ b/content/media/webaudio/test/mochitest.ini
@@ -13,6 +13,7 @@ support-files =
   small-shot-expected.wav
   small-shot-mono-expected.wav
   small-shot.ogg
+  small-shot.mp3
   ting-44.1k-1ch.ogg
   ting-44.1k-2ch.ogg
   ting-48k-1ch.ogg
@@ -71,6 +72,7 @@ skip-if = (toolkit == 'gonk' && !debug) || (toolkit == 'android') #bug 906752
 [test_bug956489.html]
 [test_bug964376.html]
 [test_bug972678.html]
+[test_bug1056032.html]
 [test_channelMergerNode.html]
 [test_channelMergerNodeWithVolume.html]
 [test_channelSplitterNode.html]
diff --git a/content/media/webaudio/test/small-shot.mp3 b/content/media/webaudio/test/small-shot.mp3
new file mode 100644
index 000000000000..f9397a5106be
Binary files /dev/null and b/content/media/webaudio/test/small-shot.mp3 differ
diff --git a/content/media/webaudio/test/test_bug1056032.html b/content/media/webaudio/test/test_bug1056032.html
new file mode 100644
index 000000000000..98fb159f7651
--- /dev/null
+++ b/content/media/webaudio/test/test_bug1056032.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<meta charset=utf-8>
+<head>
+  <title>Test that we can decode an mp3 (bug 1056032)</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+var filename = "small-shot.mp3";
+
+SimpleTest.waitForExplicitFinish();
+
+addLoadEvent(function() {
+  var xhr = new XMLHttpRequest();
+  xhr.open("GET", filename);
+  xhr.responseType = "arraybuffer";
+  xhr.onload = function() {
+    var context = new AudioContext();
+    context.decodeAudioData(xhr.response, function(b) {
+      ok(true, "We can decode an mp3 using decodeAudioData");
+      SimpleTest.finish();
+    }, function() {
+      ok(false, "We should be able to decode an mp3 using decodeAudioData but couldn't");
+      SimpleTest.finish();
+    });
+  };
+  xhr.send(null);
+});
+</script>
+</pre>
+</body>
+</html>
