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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-biquadfilternode-interface/ctor-biquadfilter.html b/testing/web-platform/tests/webaudio/the-audio-api/the-biquadfilternode-interface/ctor-biquadfilter.html
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+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-biquadfilternode-interface/ctor-biquadfilter.html
@@ -0,0 +1,86 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test Constructor: BiquadFilter
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit-util.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+    <script src="/webaudio/resources/audionodeoptions.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let context;
+
+      let audit = Audit.createTaskRunner();
+
+      audit.define('initialize', (task, should) => {
+        context = initializeContext(should);
+        task.done();
+      });
+
+      audit.define('invalid constructor', (task, should) => {
+        testInvalidConstructor(should, 'BiquadFilterNode', context);
+        task.done();
+      });
+
+      audit.define('default constructor', (task, should) => {
+        let prefix = 'node0';
+        let node = testDefaultConstructor(should, 'BiquadFilterNode', context, {
+          prefix: prefix,
+          numberOfInputs: 1,
+          numberOfOutputs: 1,
+          channelCount: 2,
+          channelCountMode: 'max',
+          channelInterpretation: 'speakers'
+        });
+
+        testDefaultAttributes(should, node, prefix, [
+          {name: 'type', value: 'lowpass'}, {name: 'Q', value: 1},
+          {name: 'detune', value: 0}, {name: 'frequency', value: 350},
+          {name: 'gain', value: 0.0}
+        ]);
+
+        task.done();
+      });
+
+      audit.define('test AudioNodeOptions', (task, should) => {
+        testAudioNodeOptions(should, context, 'BiquadFilterNode');
+        task.done();
+      });
+
+      audit.define('construct with options', (task, should) => {
+        let node;
+        let options = {
+          type: 'highpass',
+          frequency: 512,
+          detune: 1,
+          Q: 5,
+          gain: 3,
+        };
+
+        should(
+            () => {
+              node = new BiquadFilterNode(context, options);
+            },
+            'node = new BiquadFilterNode(..., ' + JSON.stringify(options) + ')')
+            .notThrow();
+
+        // Test that attributes are set according to the option values.
+        should(node.type, 'node.type').beEqualTo(options.type);
+        should(node.frequency.value, 'node.frequency.value')
+            .beEqualTo(options.frequency);
+        should(node.detune.value, 'node.detuen.value')
+            .beEqualTo(options.detune);
+        should(node.Q.value, 'node.Q.value').beEqualTo(options.Q);
+        should(node.gain.value, 'node.gain.value').beEqualTo(options.gain);
+
+        task.done();
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>