<!DOCTYPE HTML>
<html reftest-async-scroll>
<div style="transform: translateY(90px); margin-top: 10px">
<div style="overflow:scroll; height: 400px; width: 400px; background-color: yellow"
     reftest-displayport-x="0"
     reftest-displayport-y="0"
     reftest-displayport-w="400"
     reftest-displayport-h="800"
     reftest-async-scroll-x="0"
     reftest-async-scroll-y="120">
<div style="height: 800px">
<div style="position:sticky; top: 0px; height: 20px; background-color: green"></div>
</div>
</div>
</div>