--- a/dom/media/mediasource/test/mochitest.ini
+++ b/dom/media/mediasource/test/mochitest.ini
@@ -107,17 +107,17 @@ skip-if = ((os == "win" && os_version ==
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_SeekNoData_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_SeekedEvent_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_SeekToEnd_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_SeekToLastFrame_mp4.html]
-skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
+skip-if = ((os == "win" && (os_version == "5.1" || os_version == "6.2")) || (toolkit == 'android')) # Not supported on xp and android 2.3, win8 see bug 1347101
 [test_SeekTwice_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_Sequence_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3
 [test_SetModeThrows.html]
 [test_SplitAppendDelay.html]
 [test_SplitAppendDelay_mp4.html]
 skip-if = ((os == "win" && os_version == "5.1") || (toolkit == 'android')) # Not supported on xp and android 2.3