Victoria has recorded 5919 new Covid-19 cases in another record day of new infections.
The state set another coronavirus record on Friday, with the number of new daily cases jumping by more than 780 along with seven deaths.
More than 66,700 tests were processed on Thursday, with sites buckling under the demand and having to close early in the day when reaching capacity.
With temperatures set to soar across the New Year weekend, people are warned the weather could close sites too.
"Some testing sites may need to close over the next three days due to excessive heat, particularly those located outdoors in tents," Chief Health Officer Brett Sutton's daily update email says.
"Temperature inside the tents can rise even 10 degrees higher, and testing staff work in full PPE."
The number of active Victorian coronavirus cases has grown to 28,044.
There are 54 people with the virus in intensive care and 428 in total in hospital, with the seven-day hospitalisation average of 392.
However, there are fewer people on ventilators - 21 on Friday, down from 23 on Thursday and 28 on Wednesday.
Ninety-three per cent of the Victorian population aged 12 years or above has now been fully vaccinated.
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