--- a/tests/test-exchange-obsmarkers-case-B6.t	Wed Mar 21 16:06:17 2018 +0100
+++ b/tests/test-exchange-obsmarkers-case-B6.t	Wed Mar 21 16:18:31 2018 +0100
@@ -72,18 +72,18 @@
   obsstore content
   ================
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   obshashtree
   ===========
-  a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 86c0915d87bd250d041dcb32e46789b6f859686b
-  f5bc6836db60e308a17ba08bf050154ba9c4fad7 90eb403e560458149d549c4a965c0c2b81fe0cbb
-  962ecf6b1afc94e15c7e48fdfb76ef8abd11372b 6758dc37fbd86f9625196ba95b8b76ec8c72e73d
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 ce7933a7b712bc438ea1881c2b79c6581618245c
+  a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04 86e41541149f4b6cccc5fd131d744d8e83a681e5
+  f5bc6836db60e308a17ba08bf050154ba9c4fad7 f2e05412d3f1d5bc1ae647cf9efc43e0399c26ca
+  962ecf6b1afc94e15c7e48fdfb76ef8abd11372b 974507d1c466d0aa86d288836194339ed3b98736
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 1e0b6dce792c229c865a543c6f8964b4bba5fb5a
   obshashrange
   ============
            rev         node        index         size        depth      obshash
              1 f5bc6836db60            0            2            2 000000000000
-             0 a9bdc8b26820            0            1            1 86c0915d87bd
+             0 a9bdc8b26820            0            1            1 86e41541149f
              1 f5bc6836db60            1            1            2 000000000000
   $ cd ..
   $ cd ..
@@ -97,7 +97,7 @@
   ## initial state
   # obstore: main
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # obstore: pushdest
   # obstore: pulldest
   ## pushing "O" from main to pushdest
@@ -108,10 +108,10 @@
   ## post push state
   # obstore: main
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # obstore: pushdest
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # obstore: pulldest
   ## pulling "a9bdc8b26820" from main into pulldest
   pulling from main
@@ -120,11 +120,11 @@
   ## post pull state
   # obstore: main
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # obstore: pushdest
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # obstore: pulldest
   962ecf6b1afc94e15c7e48fdfb76ef8abd11372b f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
-  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
+  f6298a8ac3a4b78bbeae5f1d3dc5bc3c3812f0f3 0 {a9bdc8b26820b1b87d585b82eb0ceb4a2ecdbc04} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}