Locals are being asked not to report to Goulburn Valley Health's Acute Respiratory Clinic at Graham Street or the McIntosh Centre at Shepparton Showgrounds, as both testing sites are now at full capacity.
The sites will be up and running again tomorrow.
The Acute Respiratory Clinic will be open from 8am to 8pm, while the McIntosh Centre at Shepparton Showgrounds will be open from 8am to 6pm.
People can also be tested by appointment at the Shepparton Respiratory Clinic at 172 Welsford Street.
Do not avoid visiting GV Health if you require urgent medical attention.
UPDATE, 2.30PM:
Police are telling people at the end of the line to go home and return tomorrow for screening, if they are asymptomatic.
They say the Shepparton Showground pop-up testing site only has the capacity to test 30 people an hour.
EARLIER:
Crowds of up to 300 people have descended on the Shepparton Showgrounds pop-up COVID-19 testing site, with police informing people they may face a six-hour wait for testing.
Before the site even opened at 12.30pm today, police said people risked being turned away if they weren't tested by 7pm, when the site closes.
They said it was up to people whether they continued to wait in line, with the site able to test only 30 people an hour.
However if locals wait to be tested until tomorrow, police are urging they self-isolate until then.
There have also been long lines at Goulburn Valley Health's Acute Respiratory Clinic at Graham Street, with people waiting hours to be tested.
The hospital's chief executive Matt Sharp said there were considerations of opening a drive through testing site tomorrow, mobilising the team that had been supporting Kilmore through its outbreak.
He added GV Health had called in additional neighbouring health services from as far as Wangaratta to provide support.
The Australian Defence Force is also expected in 24 to 48 hours.
Mr Sharp said he expected several hundred if not a "few thousand" people in the next few days that will come forward for testing.
“Some of (the high-risk locations) have a high volume of people moving through those locations, so it’s quite possible there will be a large number of people getting tested," he said.
“In regards to the queues, we expect those queues will subside later on into the afternoon, and certainly into the evening when we’ve opened some additional testing sites.
“The thing with this outbreak is people need to keep those basic things in their minds like maintaining physical distancing of 1.5m, coming forward and getting tested as soon as they have any symptoms of COVID-19 no matter how mild."
Mr Sharp said he expected all those being tested to maintain 1.5m and wear masks while in line.
“We can do so much as a health service, but individual members of the community need to remember those basic things," he said.