<!DOCTYPE html>
<!--
checks that unblurred text-shadows are
actually clipped by text-overflow: clip
-->
<html>
<head></head>
<body>
  <div style="
    width: 3em;
    text-overflow: clip;
    overflow: hidden;
    text-shadow: 3em 0px black;
    white-space: nowrap;
    color: red;">MMMMMM
  </div>
</body>
</html>