1 files changed, 16 insertions, 0 deletions
diff --git a/layout/reftests/bugs/508816-2.html b/layout/reftests/bugs/508816-2.html
new file mode 100644
index 000000000..cd71a1bd5
--- /dev/null
+++ b/layout/reftests/bugs/508816-2.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <style type="text/css">
+    body { padding-right: 100px; }
+    div { border: 1px solid purple; overflow-x: scroll; overflow-y: hidden; width: 300px; margin: 0 50px 0 0; padding: 0; }
+    span { display: inline-block; height: 50px; margin: 0; }
+  </style>
+</head>
+<body dir="rtl">
+  <div style="display: -moz-box;">
+    <span style="background: green; width: 50px; position: fixed; margin-inline-start: -50px"></span>
+    <span style="background: yellow; width: 400px; overflow: hidden"></span>
+  </div>
+</body>
+</html>