--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@@ -699,17 +699,16 @@ skip-if = (os != 'android')    # meta-vi
 skip-if = (os != 'android')    # meta-viewport tag support is mobile-only
 [test_meta_viewport6.html]
 skip-if = (os != 'android')    # meta-viewport tag support is mobile-only
 [test_meta_viewport7.html]
 skip-if = (os != 'android')    # meta-viewport tag support is mobile-only
 [test_mozbrowser_apis_blocked.html]
 [test_mozMatchesSelector.html]
 [test_mutationobserver_anonymous.html]
-skip-if = stylo # bug 1383985
 [test_mutationobservers.html]
 [test_named_frames.html]
 [test_navigator_hardwareConcurrency.html]
 [test_navigator_language.html]
 [test_navigatorPrefOverride.html]
 [test_noAudioNotification.html]
 tags = audiochannel
 [test_noAudioNotificationOnMutedElement.html]