chromium/third_party/blink/web_tests/wpt_internal/js/async-gc-leak-test.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>

// Regression test for crbug.com/1474629.
promise_test(async t => {
  await gc({type: 'major', execution: 'async'});
}, 'Async gc() should not cause a leak');
</script>