--- a/tests/test-evolve.t	Fri Jun 14 18:44:43 2019 -0700
+++ b/tests/test-evolve.t	Fri Jul 19 17:25:29 2019 +0800
@@ -595,7 +595,7 @@
   picking 3:0e84df4912da "add 3"
   $ hg graft -r1
   grafting 1:73d38bb17fd7 "add 1"
-  $ hg prune -r2 --succ .
+  $ hg prune -r2 --successor .
   1 changesets pruned
   $ glog --hidden
   @  6:417185465d2c@default(draft) add 1