dig +nocookie +edns=0 +noad +norec +ednsflags=0x40 soa $zone @$server

expect: status: NOERROR
expect: the SOA record to be present in the answer section
expect: an OPT record to be present in the additional section
expect: MBZ not to be present
expect: EDNS Version 0 in response
expect: flag: aa to be present
expect: flag: ad to NOT be present