diff --git a/validate/tools/launcher/apps/gst-validate.py b/validate/tools/launcher/apps/gst-validate.py
index f0aca801ac..c419b35b56 100644
--- a/validate/tools/launcher/apps/gst-validate.py
+++ b/validate/tools/launcher/apps/gst-validate.py
@@ -204,6 +204,10 @@ G_V_BLACKLISTED_TESTS = \
   "matroskademux.gst_matroska_demux_handle_seek_push: Seek end-time not supported in streaming mode"),
  ("validate.http.playback.seek_with_stop.*mkv",
   "matroskademux.gst_matroska_demux_handle_seek_push: Seek end-time not supported in streaming mode"),
+ ("validate.*Sintel.*reverse.*mkv",
+  "TODO in matroskademux: FIXME: We should build an index during playback or "
+  "when scanning that can be used here. The reverse playback code requires "
+  " seek_index and seek_entry to be set!")
  ]
 
 class GstValidateLaunchTest(GstValidateTest):
diff --git a/validate/tools/launcher/main.py b/validate/tools/launcher/main.py
index 41851a3a37..4b2da4cad2 100644
--- a/validate/tools/launcher/main.py
+++ b/validate/tools/launcher/main.py
@@ -91,7 +91,7 @@ def main():
     dir_group.add_option("-p", "--medias-paths", dest="paths", action="append",
                       default=None,
                       help="Paths in which to look for media files, default is MAIN_DIR/gst-qa-assets/media")
-    dir_group.add_option("", "--clone-dir", dest="clone_dir",
+    dir_group.add_option("-a", "--clone-dir", dest="clone_dir",
                       default=None,
                       help="Paths in which to look for media files, default is MAIN_DIR/gst-qa-assets")
     parser.add_option_group(dir_group)