default values for mathvariant attribute on mi elements.
b=413115
new file mode 100644
--- /dev/null
+++ b/layout/reftests/mathml/mi-mathvariant-1-ref.xhtml
@@ -0,0 +1,9 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<body>
+ <math xmlns="http://www.w3.org/1998/Math/MathML">
+ <mi mathvariant="normal">cos</mi>
+ <mo>⁡</mo>
+ <mi mathvariant="italic">x</mi>
+ </math>
+</body>
+</html>
new file mode 100644
--- /dev/null
+++ b/layout/reftests/mathml/mi-mathvariant-1.xhtml
@@ -0,0 +1,9 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<body>
+ <math xmlns="http://www.w3.org/1998/Math/MathML">
+ <mi>cos</mi>
+ <mo>⁡</mo>
+ <mi>x</mi>
+ </math>
+</body>
+</html>
new file mode 100644
--- /dev/null
+++ b/layout/reftests/mathml/reftest.list
@@ -0,0 +1,1 @@
+== mi-mathvariant-1.xhtml mi-mathvariant-1-ref.xhtml
--- a/layout/reftests/reftest.list
+++ b/layout/reftests/reftest.list
@@ -82,8 +82,10 @@ include ib-split/reftest.list
include line-breaking/reftest.list
# percent-overflow-sizing
include percent-overflow-sizing/reftest.list
# forms
include forms/reftest.list
+# mathml
+include mathml/reftest.list
