--- a/tests/test-exchange-C4.t	Fri Mar 24 09:42:39 2017 +0100
+++ b/tests/test-exchange-C4.t	Fri Mar 24 09:49:03 2017 +0100
@@ -75,7 +75,7 @@
   f5bc6836db60e308a17ba08bf050154ba9c4fad7 619b4d13bd9878f04d7208dcfcf1e89da826f6be
   35b1839966785d5703a01607229eea932db42f87 ddeb7b7a87378f59cecb36d5146df0092b6b3327
   7f7f229b13a629a5b20581c6cb723f4e2ca54bed 58ef2e726c5bd89bceffb6243294b38eadbf3d60
-  $ hg debugobshashrange --rev 'head()'
+  $ hg debugobshashrange --subranges --rev 'head()'
            rev         node        index         size        depth      obshash
              2 35b183996678            0            2            2 2a098b4a877f
              2 35b183996678            1            1            2 916e804c50de