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chromium/third_party/blink/web_tests/external/wpt/svg/animations/end-attribute-change-end-time.html 

<!DOCTYPE html>
<title>Mutation of the 'end' attribute changes current interval end</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<svg>
  <rect width="100" height="100" fill="green">
    <set attributeName="fill" to="red"/>
  </rect>
</svg>
<script>
  async_test(t => {
    onload = t.step_func(() => {
      t.step_timeout(() => {
        let set = document.querySelector('set');
        set.setAttribute('end', '0s');
        requestAnimationFrame(t.step_func_done(() => {
          assert_equals(getComputedStyle(set.targetElement, null).fill, 'rgb(0, 128, 0)');
        }));
      });
    });
  });
</script>