--- a/tests/test-obsolete.t	Fri May 06 00:03:28 2016 +0200
+++ b/tests/test-obsolete.t	Fri May 06 00:08:31 2016 +0200
@@ -513,7 +513,7 @@
 should not rebase extinct changesets
 
 #excluded 'whole rebase set is extinct and ignored.' message not in core
-  $ hg rebase -b '3' -d 4 --traceback
+  $ hg rebase -b '3' -d 4 --traceback --config experimental.rebaseskipobsolete=0
   rebasing 3:0d3f46688ccc "add obsol_c"
   rebasing 8:159dfc9fa5d3 "add obsol_d''" (tip)
   2 new divergent changesets