=== output mask
dhcpd-pools: return_limit: output mask '88' is illegal
=== unknown specifier
dhcpd-pools: unknown --skip specifier: okish
=== color mode
dhcpd-pools: unknown color mode: 'sometimes'
=== IPv5
dhcpd-pools: unknown --ip-version argument: 5
=== missing conf
dhcpd-pools: parse_config: ./tests/confs/complete_NXFILE: No such file or directory
=== missing leases
dhcpd-pools: parse_leases: ./tests/leases/complete_NXFILE: No such file or directory
=== html table
dhcpd-pools: html table only output format is deprecated
=== none existing format
dhcpd-pools: unknown output format: 'z'
=== broken percent input
dhcpd-pools: illegal argument: 'eighty'