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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/iframe-first-load-canceled-second-load-blank.html b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/iframe-first-load-canceled-second-load-blank.html
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index 0000000000..bed3b6477f
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+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/iframe-first-load-canceled-second-load-blank.html
@@ -0,0 +1,38 @@
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+
+// Check about:blank navigation is asynchronous, even if the initial navigation
+// is canceled.
+promise_test(async test => {
+  // Wait for document.body to exist, before appending the <iframe>.
+  await new Promise(resolve => window.onload = resolve);
+
+  // The initial navigation in this new iframe will result in a 204 No Content.
+  // As a result the navigation will be canceled. The <iframe> will stay on the
+  // initial empty document.
+  const iframe = document.createElement("iframe");
+  iframe.src = "/common/blank.html?pipe=status(204)"
+  document.body.appendChild(iframe);
+
+  // The navigation in the iframe will be canceled. There are no good ways to
+  // detect when it will happen. Anyway, any additional navigation must be
+  // asynchronous. To test what happens when there are no pending navigation,
+  // waiting one second should be enough, most of the time.
+  await new Promise(resolve => test.step_timeout(resolve, 1000));
+
+  let load_event_fired = false;
+  const load_event_promise = new Promise(resolve => {
+    iframe.onload = () => {
+      load_event_fired = true;
+      resolve();
+    };
+  });
+  iframe.src = "about:blank";
+  assert_equals(load_event_fired, false,
+    "about:blank must not commit synchronously");
+  await load_event_promise;
+}, "about:blank navigation is asynchronous, even if the initial one is " +
+  "canceled.");
+
+</script>