string-keyframes-identifier-unprefixed.html

<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<style>
  @keyframes "anim" {
    from { background: red; }
    to { background: red; }
  }

  #target {
    animation: anim 1s forwards;
    background: green;
  }
</style>
<div id="target"></div>
<script>
test(function() {
  assert_equals(getComputedStyle(target).backgroundColor, 'rgb(0, 128, 0)');
}, 'Check that unprefixed keyframe names cannot be strings');
</script>

chromium/third_party/blink/web_tests/animations/prefixed/string-keyframes-identifier-unprefixed.html