--- a/tests/test-wireproto.t	Thu Nov 02 19:22:32 2017 +0100
+++ b/tests/test-wireproto.t	Tue Nov 07 12:10:22 2017 +0100
@@ -187,13 +187,29 @@
   (controled by 'experimental.evolution.obsdiscovery' configuration)
   obsmarker-exchange: 258 bytes received
 
+  $ cd ..
+
 And disable it server side too:
 
-  $ hg serve -R ../server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution.obsdiscovery=no
+  $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution.obsdiscovery=no
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ curl -s http://localhost:$HGPORT/?cmd=capabilities
   _evoext_getbundle_obscommon batch branchmap bundle2=HG20%0Achangegroup%3D01%2C02%0Adigests%3Dmd5%2Csha1%2Csha512%0Aerror%3Dabort%2Cunsupportedcontent%2Cpushraced%2Cpushkey%0Ahgtagsfnodes%0Alistkeys%0Aobsmarkers%3DV0%2CV1%0Aphases%3Dheads%0Apushkey%0Aremote-changegroup%3Dhttp%2Chttps changegroupsubset compression=zstd,zlib getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash (no-eol)
-  $ $RUNTESTDIR/killdaemons.py $DAEMON_PIDS
+
+Check we cannot use pushkey for marker exchange anymore
 
-  $ cd ..
+  $ hg debugpushkey http://localhost:$HGPORT/ obsolete
+  abort: HTTP Error 500: Internal Server Error
+  [255]
+  $ hg debugpushkey ssh://user@dummy/server obsolete
+  remote: abort: won't exchange obsmarkers through pushkey
+  remote: (upgrade your client or server to use the bundle2 protocol)
+  abort: unexpected response: empty string
+  [255]
+
+But we do let it goes fine on repository with exchange disabled:
+
+  $ $RUNTESTDIR/killdaemons.py $DAEMON_PIDS
+  $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution='!'
+  $ hg debugpushkey http://localhost:$HGPORT/ obsolete