--- a/tests/test-evolve.t	Tue Jun 30 18:32:12 2015 -0700
+++ b/tests/test-evolve.t	Thu Jun 25 13:33:50 2015 -0700
@@ -1372,7 +1372,7 @@
   $ printf "pp" > pp;
   $ hg add pp
   $ hg commit -m "_pp"
-  $ hg prune --succ "desc(_oo) + desc(_pp)" -r "desc('oo+pp')"
+  $ hg prune --succ "desc(_oo) + desc(_pp)" -r "desc('oo+pp')" --split
   1 changesets pruned
   1 new unstable changesets
   $ glog -r "18::"