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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Test for Bug 1515822 - restore scroll position for display: contents children</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <style>
+ #shell {
+ display: contents;
+ }
+ #outer {
+ width: 200px;
+ height: 200px;
+ overflow: scroll;
+ }
+ #inner {
+ width: 400px;
+ height: 400px;
+ background: linear-gradient(to right bottom, white, black);
+ }
+ </style>
+</head>
+<body>
+<div id="shell">
+ <div id="outer">
+ <div id="inner">
+ </div>
+ </div>
+</div>
+<script>
+const outer = document.querySelector('#outer');
+
+outer.scrollTop = 100;
+outer.scrollLeft = 100;
+document.body.offsetTop; // flush layout
+is(outer.scrollTop, 100, 'scroll position should be moved');
+is(outer.scrollLeft, 100, 'scroll position should be moved');
+
+outer.parentElement.style.display = 'none';
+document.body.offsetTop; // flush layout
+is(outer.scrollTop, 0, 'scroll position should be zero');
+is(outer.scrollLeft, 0, 'scroll position should be zero');
+
+outer.parentElement.style.display = "";
+document.body.offsetTop; // flush layout
+is(outer.scrollTop, 100, 'scroll position should be restored');
+is(outer.scrollLeft, 100, 'scroll position should be restored');
+</script>