--- a/layout/reftests/mathml/reftest.list
+++ b/layout/reftests/mathml/reftest.list
@@ -123,17 +123,17 @@ fails-if(gtkWidget&&!stylo) random-if(wi
 != mathcolor-3.xml mathcolor-3-ref.xml
 == mathcolor-4.xml mathcolor-4-ref.xml
 != mathbackground-1.xml mathbackground-1-ref.xml
 != mathbackground-2.xml mathbackground-2-ref.xml
 != mathbackground-3.xml mathbackground-3-ref.xml
 == mathbackground-4.xml mathbackground-4-ref.xml
 == mstyle-1.xhtml mstyle-1-ref.xhtml
 == mstyle-2.xhtml mstyle-2-ref.xhtml
-== mstyle-3.xhtml mstyle-3-ref.xhtml
+fuzzy-if(OSX,16,8) == mstyle-3.xhtml mstyle-3-ref.xhtml
 == mstyle-4.xhtml mstyle-4-ref.xhtml
 == mstyle-5.xhtml mstyle-5-ref.xhtml # Bug 787215
 == scale-stretchy-1.xhtml scale-stretchy-1-ref.xhtml
 != scale-stretchy-2.xhtml scale-stretchy-2-ref.xhtml
 fails-if(skiaContent&&OSX>=1010) == scale-stretchy-3.xhtml scale-stretchy-3-ref.xhtml
 != scale-stretchy-4.xhtml scale-stretchy-4-ref.xhtml
 != scale-stretchy-5.xhtml scale-stretchy-5-ref.xhtml
 != stretchy-1.html stretchy-1-ref.html