--- a/tests/test-shelve.t	Tue Jun 30 22:02:40 2015 -0700
+++ b/tests/test-shelve.t	Wed Jul 01 13:13:02 2015 -0700
@@ -85,6 +85,12 @@
   nothing changed
   [1]
 
+make sure shelve files were backed up
+
+  $ ls .hg/shelve-backup
+  default.hg
+  default.patch
+
 create an mq patch - shelving should work fine with a patch applied
 
   $ echo n > n
@@ -154,6 +160,14 @@
   $ hg shelve -d default
   $ hg qfinish -a -q
 
+ensure shelve backups aren't overwritten
+
+  $ ls .hg/shelve-backup/
+  default-1.hg
+  default-1.patch
+  default.hg
+  default.patch
+
 local edits should not prevent a shelved change from applying
 
   $ printf "z\na\n" > a/a