diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -5464,6 +5464,7 @@ def summary(ui, repo, **opts):
     if opts.get('remote'):
         t = []
         source, branches = hg.parseurl(ui.expandpath('default'))
+        sbranch = branches[0]
         other = hg.peer(repo, {}, source)
         revs, checkout = hg.addbranchrevs(repo, other, branches,
                                           opts.get('rev'))
@@ -5478,11 +5479,13 @@ def summary(ui, repo, **opts):
             t.append(_('1 or more incoming'))
 
         dest, branches = hg.parseurl(ui.expandpath('default-push', 'default'))
+        dbranch = branches[0]
         revs, checkout = hg.addbranchrevs(repo, repo, branches, None)
         if source != dest:
             other = hg.peer(repo, {}, dest)
+            ui.debug('comparing with %s\n' % util.hidepassword(dest))
+        if (source != dest or (sbranch is not None and sbranch != dbranch)):
             commoninc = None
-            ui.debug('comparing with %s\n' % util.hidepassword(dest))
         if revs:
             revs = [repo.lookup(rev) for rev in revs]
         repo.ui.pushbuffer()
diff --git a/tests/test-url-rev.t b/tests/test-url-rev.t
--- a/tests/test-url-rev.t
+++ b/tests/test-url-rev.t
@@ -245,3 +245,60 @@ Test handling of invalid urls
   [255]
 
   $ cd ..
+
+Test handling common incoming revisions between "default" and
+"default-push"
+
+  $ hg -R clone rollback
+  repository tip rolled back to revision 1 (undo pull)
+  working directory now based on revision 0
+
+  $ cd repo
+
+  $ hg update -q -C default
+  $ echo modified >> bar
+  $ hg commit -m "new head to push current default head"
+  $ hg -q push -r ".^1" '../clone'
+
+  $ hg -q outgoing '../clone'
+  2:faba9097cad4
+  4:d515801a8f3d
+
+  $ hg summary --remote --config paths.default='../clone#default' --config paths.default-push='../clone#foo'
+  parent: 4:d515801a8f3d tip
+   new head to push current default head
+  branch: default
+  commit: (clean)
+  update: (current)
+  remote: 1 outgoing
+
+  $ hg summary --remote --config paths.default='../clone#foo' --config paths.default-push='../clone'
+  parent: 4:d515801a8f3d tip
+   new head to push current default head
+  branch: default
+  commit: (clean)
+  update: (current)
+  remote: 2 outgoing
+
+  $ hg summary --remote --config paths.default='../clone' --config paths.default-push='../clone#foo'
+  parent: 4:d515801a8f3d tip
+   new head to push current default head
+  branch: default
+  commit: (clean)
+  update: (current)
+  remote: 1 outgoing
+
+  $ hg clone -q -r 0 . ../another
+  $ hg -q outgoing '../another#default'
+  3:4cd725637392
+  4:d515801a8f3d
+
+  $ hg summary --remote --config paths.default='../another#default' --config paths.default-push='../clone#default'
+  parent: 4:d515801a8f3d tip
+   new head to push current default head
+  branch: default
+  commit: (clean)
+  update: (current)
+  remote: 1 outgoing
+
+  $ cd ..