NSW Premier Dominic Perrottet urged people who don't have symptoms, have not been directed by NSW Health or are not travelling interstate to not get tested.
"I know there are long queues right across our state, so if we can help with that, if you do not feel unwell, if you are not advised by NSW Health, there is no need to receive a PCR test," he said.
"You are taking a spot in the queue from somebody who needs a test."
Health Minister Brad Hazzard said to get a rapid antigen test if you're visiting family instead of lining up for a PCR test.
"I have heard also people saying, "I'm getting it because I'm visiting Aunty Mabel in three or four days", well, if you have a test today, and then you're visiting Aunty Mabel in three or four days, it may well be by then you're positive," Mr Hazzard said.
Long testing queues in Bondi in the city's eastern suburbs have already banked up today as NSW reported another record-breaking day of COVID-19 case numbers.
The state recorded 6394 new infections in the 24 hours to 8pm last night.
No new deaths were reported in the state.
More than 109,000 people were tested yesterday.
There has been a sharp rise in hospitalisations overnight, with 458 in hospital currently.
There were 388 people in hospital yesterday.
No more people have entered intensive care since yesterday, stabilising at 52 people.
Mr Hazzard said the majority of people in intensive care are not vaccinated.
"So the unvaccinated are taking more places than perhaps should be in our ICUs simply because they have chosen not to be vaccinated," he said.
He implored everyone to get vaccinated due to the high transmissibility of the Omicron variant causing the sharp rise of cases in NSW.
QR check-in codes will be reinstalled in retail settings from tomorrow.
Mr Perrottet said there will be one code at the entry to shopping centres, and people won't need to check-in at every store.
"We will have one check-in code, just need to check-in when you go into a retail centre, you won't need to do it at every single store and that's on the advice of NSW Health because as I said that all links back to testing," Mr Perrottet said.
Victoria records 1608 new cases, two additional deaths
Victoria has recorded 1608 new cases of COVID-19 from more than 72,500 tests conducted on Christmas Day.
An additional two people died as a result of COVID-19.
Currently, there are 374 Victorians in hospital, 77 of whom are in ICU and 43 of whom are currently on ventilators.
The state's full vaccination rate for Victorians aged over 12 remains at 92 per cent.
More than five million vaccine doses have been administered to date at state-run Victorian clinics.
Queensland records 714 new cases
Queensland has recorded 714 new COVID-19 cases in the past 24 hours, a slight drop from yesterday's 765 infections.
The total number of active cases is now 2857.
More than 29,000 tests were carried out yesterday.
Chief Health Officer Dr John Gerrard said the drop in cases is due to people not coming out to get tested on Christmas Day.
"It won't surprise us at all if in the coming days the numbers get substantially higher," he said.
There are seven people in hospital who are symptomatic with the virus and no cases in the intensive care units.
Dr Gerrard said about 75 per cent of infections are the Omicron variant.
Western Australia has reported one new local COVID-19 case.
"This case, which will be officially counted in tomorrow's numbers, attended the Perth Mess Hall event, and was also staying at a hostel linked to a previous local case," a WA spokesperson said.
"This person tested positive while in quarantine and is not considered to have been contagious while in the community.
"This brings the total number of locally acquired cases to eight. All cases related to this outbreak are assumed to be Delta, following confirmation that this is the strain the index case has.
"In addition, one other case was reported overnight. This case is related to overseas travel and is in hotel quarantine."
There are now 18 active confirmed cases in WA, 15 in quarantine hotels and three in self-quarantine.