diff --git a/layout/reftests/bugs/336736-1-ref.html b/layout/reftests/bugs/336736-1-ref.html
index e8fe89728f3..116e5ade28d 100644
--- a/layout/reftests/bugs/336736-1-ref.html
+++ b/layout/reftests/bugs/336736-1-ref.html
@@ -1,13 +1,5 @@
 <html>
 <body>
-<!-- The "alternate" behavior is necessary for the
-     marquee text to start out on the screen.      -->
-<MARQUEE 
-  direction="right" 
-  scrollamount="0"
-  behavior="alternate"
->
- a
-</MARQUEE>
+<div style="background: green; width: 50px">&nbsp;</div>
 </body>
 </html>
diff --git a/layout/reftests/bugs/336736-1.html b/layout/reftests/bugs/336736-1a.html
similarity index 73%
rename from layout/reftests/bugs/336736-1.html
rename to layout/reftests/bugs/336736-1a.html
index 9a32fa3a1f5..fb54f3060e1 100644
--- a/layout/reftests/bugs/336736-1.html
+++ b/layout/reftests/bugs/336736-1a.html
@@ -2,12 +2,12 @@
 <body dir="rtl">
 <!-- The "alternate" behavior is necessary for the
      marquee text to start out on the screen.      -->
-<MARQUEE 
+<marquee 
   direction="right" 
   scrollamount="0"
   behavior="alternate"
 >
- a
-</MARQUEE>
+<div style="background: green; width: 50px">&nbsp;</div>
+</marquee>
 </body>
 </html>
diff --git a/layout/reftests/bugs/336736-1b.html b/layout/reftests/bugs/336736-1b.html
new file mode 100644
index 00000000000..85338167c24
--- /dev/null
+++ b/layout/reftests/bugs/336736-1b.html
@@ -0,0 +1,13 @@
+<html>
+<body>
+<!-- The "alternate" behavior is necessary for the
+     marquee text to start out on the screen.      -->
+<marquee 
+  direction="right" 
+  scrollamount="0"
+  behavior="alternate"
+>
+<div style="background: green; width: 50px">&nbsp;</div>
+</marquee>
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index 218d0e57d34..2c07db9f426 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -152,7 +152,8 @@ random-if(MOZ_WIDGET_TOOLKIT=="gtk2") == 333970-1.html 333970-1-ref.html # bug 3
 == 335628-1.html 335628-1-ref.html
 != 335628-2.xul 335628-2-ref.xul
 == 336147-1.html 336147-1-ref.html
-fails-if(MOZ_WIDGET_TOOLKIT=="cocoa") == 336736-1.html 336736-1-ref.html # something wrong with subpixel horizontal alignment (tracked in bug 336736)
+== 336736-1a.html 336736-1-ref.html
+== 336736-1b.html 336736-1-ref.html
 == 339289-1.html 339289-1-ref.html
 == 341043-1a.html 341043-1-ref.html
 != 341043-1b.html 341043-1-ref.html
