1 files changed, 25 insertions, 0 deletions
diff --git a/testing/web-platform/tests/quirks/html-fills-viewport-quirk-vertical.html b/testing/web-platform/tests/quirks/html-fills-viewport-quirk-vertical.html
new file mode 100644
index 0000000000..e5083b4eab
--- /dev/null
+++ b/testing/web-platform/tests/quirks/html-fills-viewport-quirk-vertical.html
@@ -0,0 +1,25 @@
+<!DOCTYPE quirks-mode>
+<link
+  rel="help"
+  href="https://quirks.spec.whatwg.org/#the-html-element-fills-the-viewport-quirk"
+/>
+<link rel="match" href="html-fills-viewport-quirk-ref.html" />
+<style>
+  html {
+    border: solid;
+    margin: 10px 11px 12px 14px;
+    writing-mode: vertical-lr;
+  }
+  body {
+    margin: 0;
+  }
+  span {
+    display: inline-block;
+    width: 100px;
+    height: 100px;
+    background: green;
+  }
+</style>
+<body>
+  <span></span>
+</body>