Update 3pm: Despite the new "low positive", the overall total has not increased due to one case being reclassified.
Update 1pm: Chief Health Officer Brett Sutton said the single case recorded on Saturday was a "low positive",
While Premier Daniel Andrews took a break after 120 consecutive days of providing updates, Health Minister Martin Foley confirmed the positive case was a person in hospital who had previously tested negative several times.
Mr Sutton said the expert review panel would look into the test result on Saturday.
"We can get these indeterminate results or only a weak signal on the test and they are a normal part of testing," Mr Sutton said. "When you're doing 20,000-plus tests, you will get one or two.
"Previously, we would have had a couple every day but among dozens and dozens positive cases. We were not digging down to those results as we are now."
Mr Foley said there were only 71 active coronavirus cases in Victoria. None of those cases were in the regions.
There were only two people in hospital with COVID-19, although neither of those people were receiving intensive care.
Earlier: Victoria has recorded just one case of coronavirus overnight, and no new deaths.
It takes the total number of cases in the state since the pandemic began to 20,348, 19,381 of whom have recovered from the disease. The number of active cases is at 80.
The regional 14-day average has dropped to Zero, while Melbourne's is at 2.4.
The Department of Health and Human Services has reminded residents to stay COVID safe this Halloween with the following advice:
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