--- a/tests/test-serve.t	Tue Nov 09 02:16:43 2021 +0100
+++ b/tests/test-serve.t	Tue Nov 09 02:19:43 2021 +0100
@@ -57,6 +57,7 @@
   $ hgserve -p daytime
   abort: cannot start server at 'localhost:13': Permission denied (?)
   abort: child process failed to start (?)
+  abort: no port number associated with service 'daytime' (?)
   listening at http://localhost/ (bound to $LOCALIP:13) (?)
   % errors
   $ KILLQUIETLY=N