diff -r 000000000000 -r 6474c204b198 layout/reftests/reftest-sanity/default-preferences-tests.list
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/reftests/reftest-sanity/default-preferences-tests.list	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+# test default-preferences
+
+# test default-preferences with a pref()
+default-preferences pref(font.size.variable.x-western,24)
+!= font-default.html font-size-16.html
+== font-default.html font-size-24.html
+
+# test that a default preference can be overridden
+pref(font.size.variable.x-western,16) == font-default.html font-size-16.html
+pref(font.size.variable.x-western,16) != font-default.html font-size-24.html
+
+# test that default preferences are kept when other test-specific preferences are set
+pref(font.size.variable.zh-HK,36) != font-default.html font-size-16.html
+pref(font.size.variable.zh-HK,36) == font-default.html font-size-24.html
+
+# test default-preferences with test-pref() and ref-pref()
+default-preferences test-pref(font.size.variable.x-western,16) ref-pref(font.size.variable.x-western,24)
+!= font-default.html font-default.html
+== font-default.html font-size-16.html
+== font-size-24.html font-default.html
+
+# test that default-preferences does not apply to include commands
+include default-preferences-include.list
+
+# test resetting default-preferences
+default-preferences
+== font-default.html font-default.html
+