NSW Premier Gladys Berejiklian has warned people not to be "lulled into a false sense of security" after the state recorded zero new coronavirus cases.
It's the second consecutive day no new cases have been found in the state.
Ms Berejiklian said she was again "worried" that testing numbers were lower than expected yesterday, at 6,353.
Roughly twice the number of tests were carried out on Saturday, at 12,333.
"Yes it's the weekend and we expect a dip but can I please encourage everybody not to get complacent," she said.
"If you're with the family in school holidays, if you're at a venue or you're enjoying the outdoors, please note, the threat of the virus is still around us."
Mr Berejiklian said NSW had done well because people had been careful and followed health warnings.
But she said that could change quickly as had been seen with Victoria's second wave.
"The last time we relaxed a little bit the Victorian situation unexpectedly arose and that was a big risk to NSW.
"I don't want to see us lulled into a false sense of security and then have us to go through the last few months of difficult times that we've had in order to keep the virus at bay."
NSW recorded four days last week with no community transmission, but in which there were some positive cases returning from overseas travel.
NSW Health's Dr Jeremy McAnulty said people should come forward for testing with "even the mildest of symptoms" including a scratchy throat, runny nose, cough or fever.
"This is particularly important with the start of the school holidays and with increased movement of people around the state," he said.
NSW Health is treating 63 active COVID-19 cases, including three people who are in intensive care, but are not being ventilated.
