--- a/tests/test-backout.t	Tue Jan 19 13:43:50 2016 -0800
+++ b/tests/test-backout.t	Wed Jan 20 08:16:58 2016 -0800
@@ -739,4 +739,17 @@
   nine
   TEN
 
+--no-commit shouldn't commit
 
+  $ hg init a
+  $ cd a
+  $ for i in 1 2 3; do
+  >   touch $i
+  >   hg ci -Am $i
+  > done
+  adding 1
+  adding 2
+  adding 3
+  $ hg backout --no-commit .
+  removing 3
+  changeset cccc23d9d68f backed out, don't forget to commit.