--- a/tests/test-metaedit.t	Sun Jul 23 19:52:06 2017 +0200
+++ b/tests/test-metaedit.t	Sun Jul 23 19:53:51 2017 +0200
@@ -119,7 +119,7 @@
   [255]
   $ hg metaedit 'desc(A)::desc(B)' --fold --config 'experimental.evolution=createmarkers, allnewcommands'
   abort: cannot fold chain not ending with a head or with branching
-  (new unstable changesets are not allowed)
+  (see 'hg help evolution.instability')
   [255]
   $ hg metaedit --user foobar
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved