--- a/tests/test-exchange-D1.t	Fri Mar 24 09:42:39 2017 +0100
+++ b/tests/test-exchange-D1.t	Fri Mar 24 09:49:03 2017 +0100
@@ -55,7 +55,7 @@
   $ hg debugobsrelsethashtree
   a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 0000000000000000000000000000000000000000
   e5ea8f9c73143125d36658e90ef70c6d2027a5b7 289cb0d058c81c763eca8bb438657dba9a7ba646
-  $ hg debugobshashrange --rev 'head()'
+  $ hg debugobshashrange --subranges --rev 'head()'
            rev         node        index         size        depth      obshash
              1 e5ea8f9c7314            0            2            2 289cb0d058c8
              0 a9bdc8b26820            0            1            1 000000000000