diff --git a/dom/media/webaudio/test/test_dynamicsCompressorNode.html b/dom/media/webaudio/test/test_dynamicsCompressorNode.html
index 5eb5c253e92c..052b276714d4 100644
--- a/dom/media/webaudio/test/test_dynamicsCompressorNode.html
+++ b/dom/media/webaudio/test/test_dynamicsCompressorNode.html
@@ -16,21 +16,15 @@ function near(a, b, msg) {
 SimpleTest.waitForExplicitFinish();
 addLoadEvent(function() {
   var context = new AudioContext();
-  var buffer = context.createBuffer(1, 2048, context.sampleRate);
-  for (var i = 0; i < 2048; ++i) {
-    buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
-  }
 
-  var destination = context.destination;
-
-  var source = context.createBufferSource();
+  var osc = context.createOscillator();
+  var sp = context.createScriptProcessor();
 
   var compressor = context.createDynamicsCompressor();
 
-  source.buffer = buffer;
-
-  source.connect(compressor);
-  compressor.connect(destination);
+  osc.connect(compressor);
+  osc.connect(sp);
+  compressor.connect(context.destination);
 
   is(compressor.channelCount, 2, "compressor node has 2 input channels by default");
   is(compressor.channelCountMode, "explicit", "Correct channelCountMode for the compressor node");
@@ -38,22 +32,36 @@ addLoadEvent(function() {
 
   // Verify default values
   with (compressor) {
+    ok(threshold instanceof AudioParam, "treshold is an AudioParam");
     near(threshold.defaultValue, -24, "Correct default value for threshold");
+    ok(knee instanceof AudioParam, "knee is an AudioParam");
     near(knee.defaultValue, 30, "Correct default value for knee");
+    ok(ratio instanceof AudioParam, "knee is an AudioParam");
     near(ratio.defaultValue, 12, "Correct default value for ratio");
+    is(typeof reduction, "number", "reduction is a number");
     near(reduction, 0, "Correct default value for reduction");
+    ok(attack instanceof AudioParam, "attack is an AudioParam");
     near(attack.defaultValue, 0.003, "Correct default value for attack");
+    ok(release instanceof AudioParam, "release is an AudioParam");
     near(release.defaultValue, 0.25, "Correct default value for release");
   }
 
-  source.start(0);
-  SimpleTest.executeSoon(function() {
-    source.stop(0);
-    source.disconnect();
-    compressor.disconnect();
+  compressor.threshold.value = -80;
 
-    SimpleTest.finish();
-  });
+  osc.start();
+  var iteration = 0;
+  sp.onaudioprocess = function(e) {
+    if (iteration > 10) {
+      ok(compressor.reduction < 0,
+         "Feeding a full-scale sine to a compressor should result in an db" +
+         "reduction.");
+      sp.onaudioprocess = null;
+      osc.stop(0);
+
+      SimpleTest.finish();
+    }
+    iteration++;
+  }
 });
 
 </script>