--- a/tests/test-rebase-collapse.t	Fri Mar 10 15:52:29 2017 -0800
+++ b/tests/test-rebase-collapse.t	Sun Mar 19 11:54:15 2017 -0700
@@ -572,6 +572,8 @@
   o  0: 'A'
   
   $ hg rebase --keepbranches --collapse -s 1 -d 3
+  transaction abort!
+  rollback completed
   abort: cannot collapse multiple named branches
   [255]