chromium/third_party/blink/web_tests/paint/printing/print-text-shadow.html

<!doctype HTML>
<style>

div {
  text-shadow: 3px 3px 10px black;
  font-size: 30px;
}

</style>

<div>Text shadow should be visible when printing.</div>

<script>
  if (window.testRunner)
    testRunner.setPrinting();
</script>