1 files changed, 25 insertions, 0 deletions
diff --git a/layout/reftests/mathml/mphantom-2.html b/layout/reftests/mathml/mphantom-2.html
new file mode 100644
index 000000000..898e84606
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+++ b/layout/reftests/mathml/mphantom-2.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>mphantom</title>
+    <meta charset="utf-8"/>
+  </head>
+  <body>
+
+    <!-- Test that <mphantom> has the size of its content. -->
+    <p>
+      <math>
+        <mtext>LEFT</mtext>
+        <munderover>
+          <mphantom>
+            <mspace width="4em" height="3em" depth="2em" mathbackground="red"/>
+          </mphantom>
+          <mtext>BELOW</mtext>
+          <mtext>ABOVE</mtext>
+        </munderover>
+        <mtext>RIGHT</mtext>
+      </math>
+    </p>
+
+  </body>
+</html>