1 files changed, 15 insertions, 0 deletions
diff --git a/layout/reftests/mathml/mo-movablelimits-dynamic-ref.html b/layout/reftests/mathml/mo-movablelimits-dynamic-ref.html
new file mode 100644
index 0000000000..41e80c0d4b
--- /dev/null
+++ b/layout/reftests/mathml/mo-movablelimits-dynamic-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+   <head>
+     <title>mo@movablelimits</title>
+     <meta charset="utf-8"/>
+   </head>
+   <body>
+    <math>
+      <munder>
+          <mo>∑</mo>
+          <mi>x</mi>
+      </munder>
+    </math>
+   </body>
+ </html>
+\ No newline at end of file