chromium/third_party/blink/web_tests/virtual/fluent-overlay-scrollbar/visual/main-thread-minimal-mode.html

<!doctype html>
<!-- Tests that main threaded scrollbars are correctly drawn in Minimal mode for
     normal and left side vertical scrollbars. -->
<meta charset="utf-8">
<meta name="fuzzy" content="0-10;0-10">
<script src="../../../resources/gesture-util.js"></script>
<script src="../../../resources/testharness.js"></script>
<style>
  body {
    background-color: green;
    color-scheme: light dark;
  }

  .rtl {
    direction: rtl;
  }

  .scrollable {
    height: 200px;
    overflow: scroll;
    resize: both;
    scrollbar-gutter: stable;
    width: 200px;
  }

  .content {
    background-image: radial-gradient(yellow, yellow);
    height: 400px;
    overflow: scroll;
    width: 400px;
  }
</style>
<div class="scrollable">
  <div class="content"></div>
</div>
<div class="scrollable rtl">
  <div class="content"></div>
</div>