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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Grid items contribution with negative margin</title>
<link rel="help" href="http://www.w3.org/TR/css-grid-1/#grid-items" title="4 Grid Items">
<meta name="assert" content="This test checks that grid items are properly placed with negative margin.">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<style>
  #grid {
    background: red;
    display: grid;
    grid-auto-flow: column;
    width: 100px;
    height: 100px;
    overflow: hidden;
  }

  #grid > div {
    width: 100px;
    height: 100px;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="grid">
    <div style="background: blue; margin-left: -100px;"></div>
    <div style="background: green;"></div>
</div>