--- a/tests/test-exchange-A6.t	Fri Mar 24 09:42:39 2017 +0100
+++ b/tests/test-exchange-A6.t	Fri Mar 24 09:49:03 2017 +0100
@@ -63,7 +63,7 @@
   a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 0000000000000000000000000000000000000000
   28b51eb45704506b5c603decd6bf7ac5e0f6a52f 0000000000000000000000000000000000000000
   e5ea8f9c73143125d36658e90ef70c6d2027a5b7 3bc2ee626e11a7cf8fee7a66d069271e17d5a597
-  $ hg debugobshashrange --rev 'head()'
+  $ hg debugobshashrange --subranges --rev 'head()'
            rev         node        index         size        depth      obshash
              2 e5ea8f9c7314            0            2            2 3bc2ee626e11
              0 a9bdc8b26820            0            1            1 000000000000