-block-end: 10px;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
</head>
<body onload="checkLayout('flexbox > item')">
<div id="target">
<flexbox>
    <item data-offset-y="8" data-expected-margin-bottom="10"></item>
    <item data-offset-y="68" data-expected-margin-bottom="0"></item>
    <item data-offset-y="8" data-expected-margin-bottom="10"></item>
    <item data-offset-y="68" data-