css/css-grid/grid-items/grid-items-inline-blocks-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Paint order of grid items is the same as inline blocks</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="http://www.w3.org/TR/css-grid-1/#z-order" title="9.5 Z-axis Ordering: the z-index property">
<link rel="help" href="http://www.w3.org/TR/CSS2/zindex.html#painting-order" title="E.2 Painting order">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
  #grid {
    display: grid;
  }

  #reference-overlapped-red {
    color: red;
    font: 100px/1 Ahem;
    grid-row: 1;
    grid-column: 1;
  }

  #test-overlapping-green {
    background-color: green;
    width: 100px;
    height: 100px;
    grid-row: 1;
    grid-column: 1;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="grid">
  <div id="reference-overlapped-red">R</div>
  <div id="test-overlapping-green"></div>
</div>