--- a/tests/test-wireproto.t	Tue Nov 27 04:42:45 2018 +0100
+++ b/tests/test-wireproto.t	Wed Dec 05 23:13:26 2018 +0800
@@ -230,6 +230,7 @@
 
   $ $RUNTESTDIR/killdaemons.py $DAEMON_PIDS
   $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution='!'
+  $ cat hg.pid >> $DAEMON_PIDS
   $ hg debugpushkey http://localhost:$HGPORT/ obsolete
 
 (do some extra pulling to be sure)