no-repaint-for-composited-background-attachment-fixed.html

<!DOCTYPE html>
<style>
::-webkit-scrollbar { display: none; }
body {
  background-image: linear-gradient(red, blue);
  background-attachment: fixed;
}
</style>
<script src="../resources/text-based-repaint.js"></script>
<script>
if (window.internals)
  internals.settings.setPreferCompositingToLCDTextEnabled(true);
function repaintTest() {
  window.scrollTo(0, 1000);
}
onload = runRepaintAndPixelTest;
</script>
<div style="height: 5000px">
Tests that scrolling a frame with background-attachment: fixed doesn't invalidate when preferCompositingToLCDText is enabled.
</div>

chromium/third_party/blink/web_tests/paint/invalidation/background/no-repaint-for-composited-background-attachment-fixed.html