diff --git a/mozilla/layout/reftests/mathml/mi-mathvariant-2-ref.xhtml b/mozilla/layout/reftests/mathml/mi-mathvariant-2-ref.xhtml
new file mode 100644
index 00000000000..043001cee12
--- /dev/null
+++ b/mozilla/layout/reftests/mathml/mi-mathvariant-2-ref.xhtml
@@ -0,0 +1,14 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<body>
+  <math xmlns="http://www.w3.org/1998/Math/MathML">
+    <!-- infinity has no corresponding mathematical italic alphanumeric
+         character and so should not be rendered with italic style.
+	 bug 413115.
+      -->
+    <mi mathvariant="normal">&#x221e;</mi>
+    <!-- PLANCK CONSTANT already has italic style, and shouldn't have
+         additional slant applied -->
+    <mi mathvariant="normal">&#x210e;</mi>
+  </math>
+</body>
+</html>
diff --git a/mozilla/layout/reftests/mathml/mi-mathvariant-2.xhtml b/mozilla/layout/reftests/mathml/mi-mathvariant-2.xhtml
new file mode 100644
index 00000000000..3828e8243ae
--- /dev/null
+++ b/mozilla/layout/reftests/mathml/mi-mathvariant-2.xhtml
@@ -0,0 +1,8 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<body>
+  <math xmlns="http://www.w3.org/1998/Math/MathML">
+    <mi>&#x221e;</mi>
+    <mi>&#x210e;</mi>
+  </math>
+</body>
+</html>
diff --git a/mozilla/layout/reftests/mathml/reftest.list b/mozilla/layout/reftests/mathml/reftest.list
index 647e6753df6..dd1b0690b22 100644
--- a/mozilla/layout/reftests/mathml/reftest.list
+++ b/mozilla/layout/reftests/mathml/reftest.list
@@ -1 +1,2 @@
 == mi-mathvariant-1.xhtml mi-mathvariant-1-ref.xhtml
+== mi-mathvariant-2.xhtml mi-mathvariant-2-ref.xhtml
