<!DOCTYPE HTML>
<style>
body {
  margin: 0;
}
#container {
  display: grid;
  grid-auto-columns: 200px;
  grid-auto-rows: auto;
  grid-auto-flow: row;
  align-content: end;
  width: 200px;
  height: 300px;
  background-color: orange;
}
.item {
  background-color: green;
}
</style>
<p style="height: 20px">Tests invalidation on align-content style change (position). Passes if the orange half is on the top.</p>
<div id="container">
  <div class="item">
    <div style="height: 50px"></div>
  </div>
  <div class="item">
    <div style="height: 50px"></div>
  </div>
  <div class="item">
    <div style="height: 50px"></div>
  </div>
</div>