--- a/tests/test-uncommit.t	Sat Jun 23 19:24:37 2012 +0200
+++ b/tests/test-uncommit.t	Tue Jun 26 16:21:08 2012 +0200
@@ -305,3 +305,19 @@
   R n
   $ hg st --copies --change .
   A e
+
+  $ hg debugsuccessors
+  5eb72dbe0cb4 c4cbebac3751
+  5eb72dbe0cb4 c706fe2c12f8
+  5eb72dbe0cb4 e8db4aa611f6
+
+Test instability warning
+
+  $ hg ci -m touncommit
+  $ echo unrelated > unrelated
+  $ hg ci -Am addunrelated unrelated
+  1 new unstables changesets
+  $ hg gdown
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  [3] touncommit
+  $ hg uncommit e