The last hit value in the clients report may be "-", because there is
a backward step of the clock caused by the doffset and reset sources
commands.
run_chronyc "clients" || test_fail
check_chronyc_output "^Hostname NTP Drop Int IntL Last Cmd Drop Int Last
===============================================================================
-.*127\.0\.0\.1 [0-9 ]+ 0 [-0-9 ]+ - [ 0-9]+ 0 0 - -.*$" \
+.*127\.0\.0\.1 [0-9 ]+ 0 [-0-9 ]+ - [-0-9 ]+ 0 0 - -.*$" \
|| test_fail
run_chronyc "ntpdata $server" || test_fail