diff --git a/mercurial/discovery.py b/mercurial/discovery.py
--- a/mercurial/discovery.py
+++ b/mercurial/discovery.py
@@ -116,7 +116,7 @@ def findcommonoutgoing(repo, other, only
         sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads)
         og._common, allmissing = sets
         og._missing = missing = []
-        og._excluded = excluded = []
+        og.excluded = excluded = []
         for node in allmissing:
             if repo[node].phase() >= phases.secret:
                 excluded.append(node)
diff --git a/tests/test-mq-safety.t b/tests/test-mq-safety.t
--- a/tests/test-mq-safety.t
+++ b/tests/test-mq-safety.t
@@ -171,7 +171,7 @@ Pushing applied patch with --force
   $ hg push --force -r default ../forcepush2
   pushing to ../forcepush2
   searching for changes
-  no changes found
+  no changes to push but 1 secret changesets
   $ hg phase -d 'mq()'
   $ hg push --force -r default ../forcepush2
   pushing to ../forcepush2