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+<!DOCTYPE html>
+<html>
+<title>CSS Flexbox: Scrollbars and flex-direction.</title>
+<link href="support/flexbox.css" rel="stylesheet">
+<link rel="help" href="https://www.w3.org/TR/css-flexbox-1/#flex-direction-property">
+<link rel="help" href="https://www.w3.org/TR/css-overflow-4/#classic-scrollbars">
+<link rel="match" href="reference/cross-axis-scrollbar-ref.html">
+<meta name="assert" content="This test ensures that flexbox scrollbars take flex-direction into account."/>
+<style>
+body {
+    margin: 0;
+}
+
+.flexbox {
+    background-color: red;
+}
+
+.vertical-rl {
+    writing-mode: vertical-rl;
+}
+
+.vertical-lr {
+    writing-mode: vertical-lr;
+}
+
+.column > div {
+    flex: none;
+    background-color: green;
+    width: 100px;
+    height: 10px;
+}
+
+.row > div {
+    background-color: green;
+    flex: 1;
+    height: 50px;
+    min-height: 0;
+}
+
+.vertical-lr > .column > div {
+    flex: none;
+    height: 50px;
+    width: 20px;
+}
+
+.vertical-lr > .row > div {
+    flex: 1;
+    width: 100px;
+}
+
+</style>
+<body>
+
+This test passes if no red is showing.
+
+<div style="position: relative;">
+
+<div style="position: absolute; top: 0; left: 0;">
+<div class="flexbox column" style="overflow-x: scroll; overflow-y: hidden; border-bottom: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+<div style="position: absolute; top: 0; left: 150px;">
+<div class="flexbox column" style="overflow-y: scroll; overflow-x: hidden; border-right: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+<div style="position: absolute; top:0; left: 300px" class="vertical-lr">
+<div class="flexbox column" style="overflow-y: scroll; overflow-x: hidden; border-right: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-flex-start"></div>
+</div>
+</div>
+
+<div style="position: absolute; top:0; left: 450px;" class="vertical-lr">
+<div class="flexbox column" style="overflow-x: scroll; overflow-y: hidden; border-bottom: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-flex-start"></div>
+</div>
+</div>
+
+<div style="height: 20px; width: 100px; position: absolute; top: 100px; left: 0">
+<div class="flexbox row" style="overflow-x: scroll; overflow-y: hidden; border-bottom: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+<div style="height: 20px; width: 100px; position: absolute; top: 100px; left: 150px">
+<div class="flexbox row" style="overflow-y: scroll; overflow-x: hidden; border-right: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+<div style="height: 50px; width: 50px; position: absolute; top: 100px; left: 300px" class="vertical-lr">
+<div class="flexbox row" style="overflow-x: scroll; overflow-y: hidden; border-bottom: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+<div style="height: 50px; width: 50px; position: absolute; top: 100px; left: 450px" class="vertical-lr">
+<div class="flexbox row" style="overflow-y: scroll; overflow-x: hidden; border-right: 10px solid green;">
+    <div class="align-self-flex-start"></div>
+    <div class="align-self-center"></div>
+    <div class="align-self-flex-end"></div>
+    <div class="align-self-baseline"></div>
+    <div class="align-self-stretch"></div>
+</div>
+</div>
+
+</div>
+<!-- FIXME: Add tests for vertical-rl.  Setting the logical
+bottom border on these tests cause additional scrollbars to appear. -->
+
+</body>
+</html>