diff --git a/layout/html/tests/css/bugs/bug04.css b/layout/html/tests/css/bugs/bug04.css
new file mode 100644
index 000000000000..dc15b6a99299
--- /dev/null
+++ b/layout/html/tests/css/bugs/bug04.css
@@ -0,0 +1 @@
+.sprockets {background:url(/Icons/sprocket.gif) #000000 top left repeat-x}