--- a/tests/test-prune.t	Mon Jul 24 01:45:17 2017 +0200
+++ b/tests/test-prune.t	Sun Jul 23 21:21:11 2017 +0200
@@ -86,7 +86,7 @@
 cannot prune public changesets
 
   $ hg prune 0
-  abort: cannot prune immutable changeset: 1f0dee641bb7
+  abort: cannot touch public changesets: 1f0dee641bb7
   (see 'hg help phases' for details)
   [255]
   $ hg debugobsolete