Stage 3 stay-at-home restrictions will be put in place for COVID-19 hotspots in Victoria from tomorrow night, Victorian Premier Daniel Andrews has announced.

It comes after Victorians authorities confirmed the state has recorded 64 new COVID-19 cases overnight.

Four previous cases have been reclassified due to duplications bringing the total number of cases to 2159.

Of the new cases 13 have been linked to outbreaks, 20 have been identified through routine testing and 31 are under investigation.

No new cases have been detected in returned travellers in hotel quarantine.

Six new cases are part of the Stamford Plaza outbreak, taking the total number of cases in that outbreak to 29.

All cases were close contacts tested while in quarantine.

The orders will come into force from 11.59pm on Wednesday, with residents only allowed to leave their homes for four reasons.

These reasons include for work or school, for care or care giving, for daily exercise, for food and other essentials.

"They are the acceptable reasons to leave but only if you need to. It is not an opportunity to go shoe shopping, it is not an opportunity to be taking daily exercise for the whole day," Andrews said.

The postcodes subject to stay-at-home orders include:

– 3012 (Brooklyn, Kingville, Maidstone, Tottenham, West Footscray)

– 3021 (Alban Vale, Kealba, Kings Park, St Albans)

– 3032 (Ascot Vale, High Point City, Maribyrnong, Travancore)

– 3038 (Keilor Downs, Keilor Lodge, Taylors Lakes, Watergardens)

– 3042 (Airport West, Keilor Park, Niddrie)

– 3046 (Glenroy, Hadfield, Oak Park)

– 3047 (Broadmeadows, Dallas, Jacana)

– 3055 (Brunswick South, Brunswick West, Moonee Vale, Moreland West)

– 3060 (Fawkner)

– 3064 (Craigieburn, Donnybrook, Mickleham, Roxburgh Park and Kalkallo)

Andrews said this decision was made because of the "unacceptably high rates of community transmission and the unacceptably high rates of new cases".

These restrictions will be in place for four weeks until July 29.

Andrews has revealed that hundreds of people have refused to participate in the state's testing blitz.

He said in Broadmeadows and Keilor Downs, which have some of the highest coronavirus cases in the state, around 928 people have refused to be tested for COVID-19.

"Now I can't change that. That's happened. All I can do is encourage those people come forward and get tested today," he said.

"Come forward and get tested tomorrow and in a broader sense if someone comes to your doorstep and asks you to be tested please say yes. Please get tested.

"Even if people don't knock on your door, if you have symptom, please come forward and get tested. It is a simple process, it is a quick process.

"It is a massive contribution to tracking and tracing, to locking this virus down, to taking control of this virus and making sure that we can, at an appropriate point in the future, resume our opening up, resume that

process of easing in a safe and balanced way."