diff --git a/dom/html/test/mochitest.ini b/dom/html/test/mochitest.ini
index 68d5e375d465..70bd4c62ffc8 100644
--- a/dom/html/test/mochitest.ini
+++ b/dom/html/test/mochitest.ini
@@ -464,7 +464,7 @@ skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(NS_ERROR_FI
 skip-if = toolkit == 'android'
 [test_formelements.html]
 [test_fullscreen-api.html]
-skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' || e10s #TIMED_OUT # b2g(time out, some kind of focus issue) b2g-debug(time out, some kind of focus issue) b2g-desktop(time out, some kind of focus issue)
+skip-if = buildapp == 'mulet' || buildapp == 'b2g' || toolkit == 'android' # b2g(time out, some kind of focus issue) b2g-debug(time out, some kind of focus issue) b2g-desktop(time out, some kind of focus issue)
 [test_fullscreen-api-race.html]
 skip-if = buildapp == 'b2g' || toolkit == 'android' || toolkit == 'cocoa' || e10s # just copy the conditions from the test above
 [test_hidden.html]