composited-layer-contents-move-in-subpixels.html

<!DOCTYPE html>
<style>
#container div {
  height: 50.2px;
  border: 1px solid black;
  margin-top: 2px;
}
#container {
  will-change: transform;
  border: 1px solid green;
  height: 500px;
}
#container #first {
  margin-top: 100.3px;
  background: yellow;
}
</style>
<div id="container">
  <div id="first"></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</div>
<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
  first.style.marginTop = '100.1px';
}
onload = runRepaintAndPixelTest;
</script>

chromium/third_party/blink/web_tests/paint/invalidation/compositing/composited-layer-contents-move-in-subpixels.html