--- a/tests/test-evolve.t	Mon Jul 24 01:45:17 2017 +0200
+++ b/tests/test-evolve.t	Sun Jul 23 21:21:11 2017 +0200
@@ -145,7 +145,7 @@
   $ hg log -r 1 --template '{rev} {phase} {obsolete}\n'
   1 public 
   $ hg prune 1
-  abort: cannot prune immutable changeset: 7c3bad9141dc
+  abort: cannot touch public changesets: 7c3bad9141dc
   (see 'hg help phases' for details)
   [255]
   $ hg log -r 1 --template '{rev} {phase} {obsolete}\n'
@@ -1339,12 +1339,12 @@
   $ mkcommit c5_
   created new head
   $ hg prune '26 + 27'
-  abort: cannot prune in the middle of a stack
-  (new unstable changesets are not allowed)
+  abort: touch will orphan 1 descendants
+  (see 'hg help evolution.instability')
   [255]
   $ hg prune '19::28'
-  abort: cannot prune in the middle of a stack
-  (new unstable changesets are not allowed)
+  abort: touch will orphan 1 descendants
+  (see 'hg help evolution.instability')
   [255]
   $ hg prune '26::'
   3 changesets pruned