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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/processing-model/delay-time-clamping.html b/testing/web-platform/tests/webaudio/the-audio-api/processing-model/delay-time-clamping.html
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index 0000000000..fa010df3cd
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+++ b/testing/web-platform/tests/webaudio/the-audio-api/processing-model/delay-time-clamping.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html class="a">
+  <head>
+    <title>Delay time clamping in cycles</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <script>
+      function doTest() {
+        let off = new OfflineAudioContext(1, 512, 48000);
+        let b = new AudioBuffer({sampleRate: off.sampleRate, length: 1});
+        b.getChannelData(0)[0] = 1;
+        let impulse = new AudioBufferSourceNode(off, {buffer: b});
+        impulse.start(0);
+        // This delayTime of 64 samples MUST be clamped to 128 samples when
+        // in a cycle.
+        let delay = new DelayNode(off, {delayTime: 64 / 48000});
+        let fb = new GainNode(off);
+        impulse.connect(fb).connect(delay).connect(fb).connect(off.destination);
+        return off.startRendering().then((b) => {
+          return Promise.resolve(b.getChannelData(0));
+        })
+      }
+
+      promise_test(() => {
+        return doTest().then(samples => {
+          for (var i = 0; i < samples.length; i++) {
+            if ((i % 128) != 0) {
+              assert_equals(
+                  samples[i], 0.0,
+                  'Non-silent audio found in between delayed impulses');
+            } else {
+              assert_equals(
+                  samples[i], 1.0,
+                  'Silent audio found instead of a delayed impulse');
+            }
+          }
+        });
+      }, 'Test that a DelayNode allows a feedback loop of a single rendering quantum');
+    </script>
+  </body>
+</html>