diff --git a/content/media/webaudio/test/Makefile.in b/content/media/webaudio/test/Makefile.in
index 89da9bf5d60d..e05e25d7201c 100644
--- a/content/media/webaudio/test/Makefile.in
+++ b/content/media/webaudio/test/Makefile.in
@@ -26,6 +26,8 @@ MOCHITEST_FILES := \
   test_AudioContext.html \
   test_AudioListener.html \
   test_AudioParam.html \
+  test_audioParamExponentialRamp.html \
+  test_audioParamLinearRamp.html \
   test_audioBufferSourceNode.html \
   test_audioBufferSourceNodeLazyLoopParam.html \
   test_audioBufferSourceNodeLoop.html \
diff --git a/content/media/webaudio/test/test_audioParamExponentialRamp.html b/content/media/webaudio/test/test_audioParamExponentialRamp.html
new file mode 100644
index 000000000000..1eb444f04711
--- /dev/null
+++ b/content/media/webaudio/test/test_audioParamExponentialRamp.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test AudioParam.exponentialRampToValue</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="webaudio.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+  SpecialPowers.setBoolPref("media.webaudio.enabled", true);
+
+  var context = new AudioContext();
+
+  var V0 = 0.1;
+  var V1 = 0.9;
+  var T0 = 0;
+  var T1 = 2048 / context.sampleRate;
+
+  var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate);
+  for (var i = 0; i < 2048; ++i) {
+    sourceBuffer.getChannelData(0)[i] = 1;
+  }
+  var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
+  for (var i = 0; i < 2048; ++i) {
+    var t = i / context.sampleRate;
+    expectedBuffer.getChannelData(0)[i] = V0 * Math.pow(V1 / V0, (t - T0) / (T1 - T0));
+  }
+
+  var destination = context.destination;
+
+  var source = context.createBufferSource();
+  source.buffer = sourceBuffer;
+
+  var gain = context.createGain();
+  gain.gain.setValueAtTime(V0, 0);
+  gain.gain.exponentialRampToValueAtTime(V1, 2048/context.sampleRate);
+
+  var sp = context.createScriptProcessor(2048, 1);
+  source.connect(gain);
+  gain.connect(sp);
+  sp.connect(destination);
+
+  source.start(0);
+  sp.onaudioprocess = function(e) {
+    is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
+    compareBuffers(e.inputBuffer.getChannelData(0), expectedBuffer.getChannelData(0));
+
+    sp.onaudioprocess = null;
+
+    SpecialPowers.clearUserPref("media.webaudio.enabled");
+    SimpleTest.finish();
+  };
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/webaudio/test/test_audioParamLinearRamp.html b/content/media/webaudio/test/test_audioParamLinearRamp.html
new file mode 100644
index 000000000000..034c825b4799
--- /dev/null
+++ b/content/media/webaudio/test/test_audioParamLinearRamp.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test AudioParam.linearRampToValue</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="webaudio.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+  SpecialPowers.setBoolPref("media.webaudio.enabled", true);
+
+  var context = new AudioContext();
+
+  var V0 = 0.1;
+  var V1 = 0.9;
+  var T0 = 0;
+  var T1 = 2048 / context.sampleRate;
+
+  var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate);
+  for (var i = 0; i < 2048; ++i) {
+    sourceBuffer.getChannelData(0)[i] = 1;
+  }
+  var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
+  for (var i = 0; i < 2048; ++i) {
+    var t = i / context.sampleRate;
+    expectedBuffer.getChannelData(0)[i] = V0 + (V1 - V0) * ((t - T0) / (T1 - T0));
+  }
+
+  var destination = context.destination;
+
+  var source = context.createBufferSource();
+  source.buffer = sourceBuffer;
+
+  var gain = context.createGain();
+  gain.gain.setValueAtTime(V0, 0);
+  gain.gain.linearRampToValueAtTime(V1, 2048/context.sampleRate);
+
+  var sp = context.createScriptProcessor(2048, 1);
+  source.connect(gain);
+  gain.connect(sp);
+  sp.connect(destination);
+
+  source.start(0);
+  sp.onaudioprocess = function(e) {
+    is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
+    compareBuffers(e.inputBuffer.getChannelData(0), expectedBuffer.getChannelData(0));
+
+    sp.onaudioprocess = null;
+
+    SpecialPowers.clearUserPref("media.webaudio.enabled");
+    SimpleTest.finish();
+  };
+});
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/content/media/webaudio/test/webaudio.js b/content/media/webaudio/test/webaudio.js
index 32bbc34f3157..28f6dfeda595 100644
--- a/content/media/webaudio/test/webaudio.js
+++ b/content/media/webaudio/test/webaudio.js
@@ -24,7 +24,7 @@ function expectTypeError(func) {
 }
 
 function fuzzyCompare(a, b) {
-  return Math.abs(a - b) < 5e-5;
+  return Math.abs(a - b) < 9e-3;
 }
 
 function compareBuffers(buf1, buf2,
