diff --git a/mercurial/httppeer.py b/mercurial/httppeer.py
--- a/mercurial/httppeer.py
+++ b/mercurial/httppeer.py
@@ -237,6 +237,9 @@ class httppeer(wireproto.wirepeer):
         stream =  self._callstream(cmd, **args)
         return util.chunkbuffer(zgenerator(stream))
 
+    def _abort(self, exception):
+        raise exception
+
 class httpspeer(httppeer):
     def __init__(self, ui, path):
         if not url.has_https:
diff --git a/tests/test-identify.t b/tests/test-identify.t
--- a/tests/test-identify.t
+++ b/tests/test-identify.t
@@ -109,6 +109,12 @@ test remote identify with bookmarks
   $ hg id --bookmarks -r . http://localhost:$HGPORT1/
   Y Z
 
+test invalid lookup
+
+  $ hg id -r noNoNO http://localhost:$HGPORT1/
+  abort: unknown revision 'noNoNO'!
+  [255]
+
 Make sure we do not obscure unknown requires file entries (issue2649)
 
   $ echo fake >> .hg/requires
diff --git a/tests/test-ssh.t b/tests/test-ssh.t
--- a/tests/test-ssh.t
+++ b/tests/test-ssh.t
@@ -284,6 +284,10 @@ Test remote paths with spaces (issue2983
   $ hg id --ssh "python \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   73649e48688a
 
+  $ hg id --ssh "python \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo#noNoNO"
+  abort: unknown revision 'noNoNO'!
+  [255]
+
 Test (non-)escaping of remote paths with spaces when cloning (issue3145):
 
   $ hg clone --ssh "python \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
@@ -382,3 +386,4 @@ Test hg-ssh in read-only mode:
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
+  Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio