diff --git a/mercurial/sshpeer.py b/mercurial/sshpeer.py
--- a/mercurial/sshpeer.py
+++ b/mercurial/sshpeer.py
@@ -313,6 +313,8 @@
         if not capsline.startswith('capabilities: '):
             badresponse()
 
+        ui.debug('remote: %s\n' % capsline)
+
         caps.update(capsline.split(':')[1].split())
         # Trailing newline.
         stdout.read(1)
diff --git a/tests/test-ssh-proto.t b/tests/test-ssh-proto.t
--- a/tests/test-ssh-proto.t
+++ b/tests/test-ssh-proto.t
@@ -484,6 +484,7 @@
   devel-peer-request:   pairs: 81 bytes
   sending between command
   protocol upgraded to exp-ssh-v2-0001
+  remote: capabilities: lookup changegroupsubset branchmap pushkey known getbundle unbundlehash batch streamreqs=generaldelta,revlogv1 $USUAL_BUNDLE2_CAPS_SERVER$ unbundle=HG10GZ,HG10BZ,HG10UN
   url: ssh://user@dummy/server
   local: no
   pushable: yes
@@ -500,6 +501,7 @@
   devel-peer-request:   pairs: 81 bytes
   sending between command
   protocol upgraded to exp-ssh-v2-0001
+  remote: capabilities: lookup changegroupsubset branchmap pushkey known getbundle unbundlehash batch streamreqs=generaldelta,revlogv1 $USUAL_BUNDLE2_CAPS_SERVER$ unbundle=HG10GZ,HG10BZ,HG10UN
   Main capabilities:
     batch
     branchmap