--- a/tests/test-http
+++ b/tests/test-http
@@ -6,6 +6,8 @@ echo foo>foo
 hg commit -A -d '0 0' -m 1
 hg --config server.uncompressed=True serve -p 20059 -d --pid-file=../hg1.pid
 hg serve -p 20060 -d --pid-file=../hg2.pid
+# Test server address cannot be reused
+hg serve -p 20060 2>&1 | sed -e 's/abort: cannot start server:.*/abort: cannot start server:/'
 cd ..
 cat hg1.pid hg2.pid >> $DAEMON_PIDS