--- a/testing/web-platform/tests/media-source/manifest.txt
+++ b/testing/web-platform/tests/media-source/manifest.txt
@@ -12,21 +12,27 @@ mediasource-config-change-mp4-v-framerat
 mediasource-config-change-mp4-v-framesize.html
 mediasource-config-change-webm-a-bitrate.html
 mediasource-config-change-webm-av-audio-bitrate.html
 mediasource-config-change-webm-av-framesize.html
 mediasource-config-change-webm-av-video-bitrate.html
 mediasource-config-change-webm-v-bitrate.html
 mediasource-config-change-webm-v-framerate.html
 mediasource-config-change-webm-v-framesize.html
+mediasource-duration-boundaryconditions.html
 mediasource-duration.html
 mediasource-endofstream-invaliderror.html
 mediasource-getvideoplaybackquality.html
 mediasource-is-type-supported.html
+mediasource-liveseekable.html
 mediasource-multiple-attach.html
 mediasource-play.html
 mediasource-play-then-seek-back.html
+mediasource-preload.html
 mediasource-redundant-seek.html
 mediasource-remove.html
+mediasource-removesourcebuffer.html
 mediasource-seek-beyond-duration.html
 mediasource-seek-during-pending-seek.html
+mediasource-sequencemode-append-buffer.html
 mediasource-sourcebufferlist.html
 mediasource-sourcebuffer-mode.html
+mediasource-timestamp-offset.html