diff -r 183eb1d7f87d -r 749b057b01f3 tests/test-rebase-scenario-global.t
--- a/tests/test-rebase-scenario-global.t	Tue Mar 07 14:04:29 2017 -0800
+++ b/tests/test-rebase-scenario-global.t	Tue Mar 07 16:30:31 2017 -0800
@@ -272,7 +272,8 @@
   rebasing 6:eea13746799a "G"
   abort: cannot use revision 6 as base, result would have 3 parents
   [255]
-
+  $ hg rebase --abort
+  rebase aborted
 
 These will abort gracefully (using --base):