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+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworklet-audioparam.https.html
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+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test AudioWorkletNode's basic AudioParam features
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      let sampleRate = 48000;
+      let renderLength = 48000 * 0.6;
+      let context;
+
+      let filePath = 'processors/gain-processor.js';
+
+      // Sets up AudioWorklet and OfflineAudioContext.
+      audit.define('Initializing AudioWorklet and Context', (task, should) => {
+        context = new OfflineAudioContext(1, renderLength, sampleRate);
+        context.audioWorklet.addModule(filePath).then(() => {
+          task.done();
+        });
+      });
+
+      // Verifies the functionality of AudioParam in AudioWorkletNode by
+      // comparing (canceling out) values from GainNode and AudioWorkletNode
+      // with simple gain computation code by AudioParam.
+      audit.define(
+          'Verifying AudioParam in AudioWorkletNode',
+          (task, should) => {
+            let constantSourceNode = new ConstantSourceNode(context);
+            let gainNode = new GainNode(context);
+            let inverterNode = new GainNode(context, {gain: -1});
+            let gainWorkletNode = new AudioWorkletNode(context, 'gain');
+            let gainWorkletParam = gainWorkletNode.parameters.get('gain');
+
+            // Test default value and setter/getter functionality.
+            should(gainWorkletParam.value,
+                   'Default gain value of gainWorkletNode')
+                .beEqualTo(Math.fround(0.707));
+            gainWorkletParam.value = 0.1;
+            should(gainWorkletParam.value,
+                   'Value of gainWorkletParam after setter = 0.1')
+                .beEqualTo(Math.fround(0.1));
+
+            constantSourceNode.connect(gainNode)
+                .connect(inverterNode)
+                .connect(context.destination);
+            constantSourceNode.connect(gainWorkletNode)
+                .connect(context.destination);
+
+            // With arbitrary times and values, test all possible AudioParam
+            // automations.
+            [gainNode.gain, gainWorkletParam].forEach((param) => {
+              param.setValueAtTime(0, 0);
+              param.linearRampToValueAtTime(1, 0.1);
+              param.exponentialRampToValueAtTime(0.5, 0.2);
+              param.setValueCurveAtTime([0, 2, 0.3], 0.2, 0.1);
+              param.setTargetAtTime(0.01, 0.4, 0.5);
+            });
+
+            // Test if the setter works correctly in the middle of rendering.
+            context.suspend(0.5).then(() => {
+              gainNode.gain.value = 1.5;
+              gainWorkletParam.value = 1.5;
+              context.resume();
+            });
+
+            constantSourceNode.start();
+            context.startRendering().then((renderedBuffer) => {
+              should(renderedBuffer.getChannelData(0),
+                     'The rendered buffer')
+                  .beConstantValueOf(0);
+              task.done();
+            });
+          });
+
+      audit.run();
+    </script>
+  </body>
+</html>