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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-null.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-null.html
new file mode 100644
index 0000000000..b5b1ec0c3d
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-null.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test ABSN Outputs Silence if buffer is null
+    </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>
+  </head>
+
+  <body>
+    <script>
+      const audit = Audit.createTaskRunner();
+
+      audit.define('ABSN with null buffer', (task, should) => {
+        // Create test context.  Length and sampleRate are pretty arbitrary, but
+        // we don't need either to be very large.
+        const context = new OfflineAudioContext(
+            {numberOfChannels: 1, length: 1024, sampleRate: 8192});
+
+        // Just create a constant buffer for testing.  Anything will do as long
+        // as the buffer contents are not identically zero.
+        const audioBuffer =
+            new AudioBuffer({length: 10, sampleRate: context.sampleRate});
+        const audioBufferSourceNode = new AudioBufferSourceNode(context);
+
+        audioBuffer.getChannelData(0).fill(1);
+
+        // These two tests are mostly for the informational messages to show
+        // what's happening.  They should never fail!
+        should(() => {
+          audioBufferSourceNode.buffer = audioBuffer;
+        }, 'Setting ABSN.buffer to AudioBuffer').notThrow();
+
+        // This is the important part.  Setting the buffer to null after setting
+        // it to something else should cause the source to produce silence.
+        should(() => {
+          audioBufferSourceNode.buffer = null;
+        }, 'Setting ABSN.buffer = null').notThrow();
+
+        audioBufferSourceNode.start(0);
+        audioBufferSourceNode.connect(context.destination);
+
+        context.startRendering()
+            .then(buffer => {
+              // Since the buffer is null, the output of the source should be
+              // silence.
+              should(buffer.getChannelData(0), 'ABSN output')
+                  .beConstantValueOf(0);
+            })
+            .then(() => task.done());
+      });
+
+      audit.run();
+    </script>
+  </body>
+</html>