The Hawke's Bay District Health Board is urging the public to refrain from turning up at coronavirus test centres without GP referral.
The Community Based Assessment Centre (CBAC), Covid-19 dedicated testing sites, require patients to first phone their GP for approval prior to arrival.
The CBACs use a drive through system, in which patients are met by team members who assess them and instruct patients on what they need to do.
Hawke's Bay DHB emergency response operations lead Claire Caddie said people can only be tested at CBACs if they have a referral from their GP.
"They are not drop-in centres," she said. "If you are ill, you must phone your general practice first.