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<!DOCTYPE html>
<html reftest-async-scroll
      reftest-displayport-x="0" reftest-displayport-y="0"
      reftest-displayport-w="800" reftest-displayport-h="2000"
      reftest-async-scroll-x="0" reftest-async-scroll-y="400"
      class="reftest-wait">
<head>

<style>

html {
  scrollbar-width: none;
}

body {
  margin: 0;
  height: 4000px;
}

div {
  left: 200px;
  top: 200px;
  width: 200px;
  height: 200px;
}

.scrolled {
  position: absolute;
  z-index: 1;
}

.fixed {
  position: fixed;
  background-color: red;
}

</style>
</head>
<body>

<div class="scrolled reftest-no-display-list" style="top: 200px; background-color: green"></div>
<div class="scrolled" style="top: 600px;" id="scrolled"></div>
<div class="fixed" style="top: 200px"></div>
<div class="fixed" style="top: 200px; width: 100px; height: 100px; z-index: 2"></div>

</body>

<script>
function doTest() {
  document.getElementById("scrolled").style.backgroundColor = "blue";
  document.documentElement.removeAttribute("class");
}

window.addEventListener("MozReftestInvalidate", doTest);
</script>
</html>