--- a/dom/media/tests/mochitest/mochitest.ini
+++ b/dom/media/tests/mochitest/mochitest.ini
@@ -40,16 +40,17 @@ skip-if = (toolkit == 'gonk' && debug) #
 [test_getUserMedia_stopAudioStream.html]
 [test_getUserMedia_stopAudioStreamWithFollowupAudio.html]
 [test_getUserMedia_stopVideoAudioStream.html]
 skip-if = (toolkit == 'gonk' && debug) # debug-only failure
 [test_getUserMedia_stopVideoAudioStreamWithFollowupVideoAudio.html]
 [test_getUserMedia_stopVideoStream.html]
 [test_getUserMedia_stopVideoStreamWithFollowupVideo.html]
 [test_getUserMedia_peerIdentity.html]
+skip-if = toolkit == 'gonk' # b2g(Bug 1021776, too --ing slow on b2g)
 [test_peerConnection_addCandidateInHaveLocalOffer.html]
 [test_peerConnection_basicAudio.html]
 skip-if = (toolkit == 'gonk' && debug) # Bug 962984, test fail on b2g debug build
 [test_peerConnection_basicAudioVideo.html]
 skip-if = toolkit == 'gonk' # b2g(Bug 960442, video support for WebRTC is disabled on b2g)
 [test_peerConnection_basicAudioVideoCombined.html]
 skip-if = toolkit == 'gonk' # b2g(Bug 960442, video support for WebRTC is disabled on b2g)
 [test_peerConnection_basicVideo.html]