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+<!DOCTYPE html>
+<!--
+    Any copyright is dedicated to the Public Domain.
+    http://creativecommons.org/publicdomain/zero/1.0
+-->
+<html>
+<head>
+  <title>CSS Test: Testing safe overflow-position for align-content, justify-content, and align-items in flex containers</title>
+  <link rel="author" title="Mihir Iyer" href="mailto:miyer@mozilla.com">
+  <link rel="help" href="https://drafts.csswg.org/css-align-3/#overflow-values">
+  <link rel="match" href="flexbox-safe-overflow-position-001-ref.html">
+  <meta charset="utf-8">
+  <style>
+    .flex {
+      display: flex;
+      width: 85px;
+      height: 65px;
+      border: 1px solid black;
+      align-content: safe flex-end;
+      justify-content: safe center;
+      align-items: safe center;
+      float: left;
+      clear: both;
+      margin-top: 100px;
+    }
+    .rowNoWrap {
+      flex-flow: row nowrap;
+    }
+    .columnNoWrap {
+      flex-flow: column wrap;
+    }
+    .item {
+      border: 1px solid blue;
+      background: lightblue;
+      width: 28px;
+      height: 28px;
+      flex-shrink: 0;
+    }
+    .bigItem {
+      border: 1px solid blue;
+      background: lightblue;
+      width: 28px;
+      height: 90px;
+      flex-shrink: 0;
+    }
+  </style>
+</head>
+<body>
+  <div class="flex rowNoWrap">
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="bigItem"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+  </div>
+  <div class="flex columnNoWrap">
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+  </div>
+</body>
+</html>