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diff --git a/testing/web-platform/tests/resource-timing/buffer-full-eventually.html b/testing/web-platform/tests/resource-timing/buffer-full-eventually.html
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+++ b/testing/web-platform/tests/resource-timing/buffer-full-eventually.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8" />
+<link rel="help"
+      href="http://www.w3.org/TR/resource-timing/#performanceresourcetiming"/>
+<title>This test validates that resource timing implementations have a finite
+       number of entries in their buffer.</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<script>
+promise_test(t => {
+  return new Promise(resolve => {
+    let counter = 0;
+    performance.onresourcetimingbufferfull = resolve;
+    const loadImagesRecursively = () => {
+      // Load an image.
+      (new Image()).src = "resources/blue.png?" + counter;
+      ++counter;
+      // Yield to enable queueing an entry, then recursively load another image.
+      t.step_timeout(loadImagesRecursively, 0);
+    };
+    loadImagesRecursively();
+  });
+}, "Finite resource timing entries buffer size");
+</script>
+</body>
+</html>