--- a/dom/media/test/mochitest.ini
+++ b/dom/media/test/mochitest.ini
@@ -826,36 +826,49 @@ skip-if = buildapp == 'b2g' && toolkit !
 tags=msg capturestream
 [test_streams_individual_pause.html]
 tags=msg
 [test_streams_srcObject.html]
 tags=msg capturestream
 [test_streams_tracks.html]
 tags=msg capturestream
 [test_texttrack.html]
+tags = webvtt
 [test_texttrackcue.html]
+tags = webvtt
 [test_texttrackcue_moz.html]
+tags = webvtt
 [test_texttrackevents_video.html]
+tags = webvtt
 [test_texttracklist.html]
+tags = webvtt
 [test_texttracklist_moz.html]
+tags = webvtt
 [test_texttrackregion.html]
+tags = webvtt
 [test_texttrack_moz.html]
+tags = webvtt
 [test_timeupdate_small_files.html]
 [test_trackelementevent.html]
+tags = webvtt
 [test_trackevent.html]
+tags = webvtt
 [test_unseekable.html]
 skip-if = toolkit == 'gonk' # bug 1128845 on gonk
 [test_video_to_canvas.html]
 [test_video_in_audio_element.html]
 [test_videoDocumentTitle.html]
 [test_VideoPlaybackQuality.html]
 [test_VideoPlaybackQuality_disabled.html]
 [test_volume.html]
 [test_vttparser.html]
+tags = webvtt
 [test_webvtt_disabled.html]
+tags = webvtt
 [test_webvtt_positionalign.html]
+tags = webvtt
 
 # The tests below contain backend-specific tests. Write backend independent
 # tests rather than adding to this list.
 [test_can_play_type_webm.html]
 [test_can_play_type_wave.html]
 [test_fragment_noplay.html]
 [test_fragment_play.html]