--- a/tests/test-exchange-D2.t	Fri Mar 24 09:42:39 2017 +0100
+++ b/tests/test-exchange-D2.t	Fri Mar 24 09:49:03 2017 +0100
@@ -52,7 +52,7 @@
   $ hg debugobsrelsethashtree
   a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 554c0b12f7d9fff20cb904c26e12eee337e3309c
   28b51eb45704506b5c603decd6bf7ac5e0f6a52f 5c81c58ce0a8ad61dd9cf4c6949846b5990af30d
-  $ hg debugobshashrange --rev 'head()'
+  $ hg debugobshashrange --subranges --rev 'head()'
            rev         node        index         size        depth      obshash
              0 a9bdc8b26820            0            1            1 554c0b12f7d9
   $ cd ..