--- a/tests/test-exchange-C1.t	Fri Mar 24 09:42:39 2017 +0100
+++ b/tests/test-exchange-C1.t	Fri Mar 24 09:49:03 2017 +0100
@@ -52,7 +52,7 @@
   a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 1ce18e5a71f78d443a80c819f2f7197c4706af70
   f5bc6836db60e308a17ba08bf050154ba9c4fad7 92af733686ce7e0469d8b2b87b4612a4c2d33468
   f6fbb35d8ac958bbe70035e4c789c18471cdc0af 3800aeba3728457abb9c508c94f6abc59e698c55
-  $ hg debugobshashrange --rev 'head()'
+  $ hg debugobshashrange --subranges --rev 'head()'
            rev         node        index         size        depth      obshash
              0 a9bdc8b26820            0            1            1 1ce18e5a71f7
   $ cd ..