--- a/tests/test-commandserver.t	Thu Jul 13 03:17:58 2017 +0900
+++ b/tests/test-commandserver.t	Thu Jul 13 03:17:58 2017 +0900
@@ -189,6 +189,7 @@
   bundle.mainreporoot=$TESTTMP/repo
   devel.all-warnings=true
   devel.default-date=0 0
+  extensions.fsmonitor= (fsmonitor !)
   largefiles.usercache=$TESTTMP/.cache/largefiles
   ui.slash=True
   ui.interactive=False