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diff --git a/gfx/layers/apz/test/mochitest/helper_hittest_iframe_perspective-2.html b/gfx/layers/apz/test/mochitest/helper_hittest_iframe_perspective-2.html
new file mode 100644
index 0000000000..9838a02aa9
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+++ b/gfx/layers/apz/test/mochitest/helper_hittest_iframe_perspective-2.html
@@ -0,0 +1,69 @@
+<head>
+  <meta name="viewport" content="width=device-width; initial-scale=1.0">
+  <title>Test that events are delivered to the correct document near an iframe inide a perspective transform</title>
+  <script src="apz_test_native_event_utils.js"></script>
+  <script src="apz_test_utils.js"></script>
+  <script src="/tests/SimpleTest/paint_listener.js"></script>
+  <style>
+    div {
+      position: absolute;
+    }
+    .outer {
+      left: 300px;
+      top: 300px;
+      transform: translate3d(0px, 0px, -500px) perspective(500px);
+    }
+    .inner {
+      left: -100px;
+      top: -100px;
+    }
+    iframe {
+      border: 0;
+    }
+  </style>
+</head>
+<body>
+  <div class="outer">
+    <div class="inner">
+      <iframe id="iframe" width="300px" height="200px" src="https://example.com/tests/gfx/layers/apz/test/mochitest/helper_hittest_iframe_perspective_child.html"></iframe>
+    </div>
+  </div>
+  <script type="application/javascript">
+async function test() {
+  // Wait for iframe to receive content transforms.
+  await SpecialPowers.spawn(iframe, [], async () => {
+    await SpecialPowers.contentTransformsReceived(content.window);
+  });
+
+  let eventPromise = new Promise(resolve => {
+    window.addEventListener("message", event => {
+      let data = JSON.parse(event.data);
+      if ("type" in data && data.type == "got-mouse-down") {
+        ok(false, "Child document should not have received mouse-down");
+        resolve();
+      }
+    });
+
+    window.addEventListener("mousedown", event => {
+      ok(true, "Parent document should have received mouse-down");
+      resolve();
+    });
+  });
+
+  // Click a bit above the iframe, and check the event is delivered
+  // to the parent document, not the iframe.
+  await synthesizeNativeMouseEventWithAPZ({
+    type: "click",
+    target: document.documentElement,
+    offsetX: 350,
+    offsetY: 175
+  });
+  await eventPromise;
+}
+
+waitUntilApzStable()
+.then(test)
+.then(subtestDone, subtestFailed);
+
+  </script>
+</body>