dig +noedns +noad +norec +zflag soa $zone @$server

expect: status: NOERROR
expect: the SOA record to be present in the answer section
expect: MBZ to NOT be in the response (see below)
expect: flag: aa to be present
expect: flag: rd to NOT be present
expect: flag: ad to NOT be present
expect: the OPT record to NOT be present