Bloomfield said there is wider testing across New Zealand, with a specific focus on Māori and Pasifika, in places like Northland.
He said in Northland health officials were working with iwi and community health providers to get more tests done, particularly in more out of the way communities.
Extended community testing specifically targeted at rural communities with a high population of Māori should give Northland more confidence in preparation for next week's alert level 3.
READ MORE:
• Covid-19 coronavirus: Report shows Northland cases' transmission sources
• Covid 19 coronavirus: Families split by border restrictions
• Covid 19 coronavirus: One World concert highlights as Kesha, Liam Payne, Rita Ora perform
• Covid 19 coronavirus: Grieving US family joins class action to sue China for six trillion dollars
Of Northland's 25 confirmed and 2 probable cases 13 people are self-isolating in the community and 14 have recovered. There have been no new cases in the region for five days.
Altogether 3298 tests have been carried out in Northland through primary care, Northland DHB hospitals, Community Based Testing Centres (CBTCs) and aged residential care facilities.
NDHB said the region's age residential care must be congratulated for the great work they have undertaken to ensure that their residents are safe. The virus has killed residents of some rest homes across the country but to date there have not been any cases in a rest home in Northland.
The spokeswoman said there is a lot of planning being done to re-establish appropriate services when level 3 kicks in from Tuesday.
Mobile testing started in Kaikohe and Whangārei on Tuesday with 50 tests done. Ngāti Hine Health Trust hosted their first mobile outreach clinic yesterday in Pipiwai and swabbed 28 people for Covid-19 and gave 16 Flu Vaccinations.
• Covid19.govt.nz: The Government's official Covid-19 advisory website