Yesterday Victoria's Health Minister refuted the NSW Premier's suggestion there was a lack of communication between the states before Victoria introduced a hard border with NSW.

In her daily press conference Ms Berejiklian doubled down on her criticism of her fellow premiers.

"Sometimes they let me know, sometimes they don't," she said.

"When they do let me know the decision has already been made."

"There's no doubt our health officials talk on a daily basis, there's no doubt the health ministers are in regular contact.

"But we have to appreciate that when you're closing a border it affects all of government, it affects all citizens in NSW and it affects citizens in other states and I think as leaders - and I include myself in this - all of us can do better."

Ms Berejiklian said all leaders should communicate with their interstate counterparts before closing a border so they could offer alternative solutions.

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The NSW Premier did not say what communication she had with Victoria ahead of her decision to close the border in July.

"We should allow each other to have input into those processes rather than just being told the decision," she said.

"As the Premier of this state I would have loved to have input to say rather than closing off all of NSW or all of Sydney from a particular state, please just consider Northern Beaches or give us 24 hours to get back to you on how we can manage this.

"All I'm suggesting is as leaders - and again I'm including myself in this - all of us can and should do better."

Ms Berejiklian was asked whether states who close their border should be responsible for 'footing the bill' for affected businesses when JobKeeper ends in March, but did not response directly.

"This is why I have been outspoken on border closures, because it's not just the health impacts we need to worry about but what it means for their livelihood, their jobs, their mental health," she said.

"I think as a nation we need to do better in that regard and I feel we need to have greater protocols in place in dealing with those issues."

Earlier today the Sydney Morning Herald reported Ms Berejiklian expected the border between NSW and Victoria to reopen this week, but the premier did not mention her expectations at the daily press conference.

NSW Premier Gladys Berejiklian said there were three cases of COVID recorded locally in the 24 hours to 8pm Sunday.

An additional case linked to Mr Druitt emergency department was located overnight.

Eight cases were recorded in hotel quarantine.

Dr Kerry Chant said 18,570 tests were reported in the 24 hours to 8pm Sunday.

She said it was essential the community strives to record more than 25,000 tests a day, ideally 30,000.

"It is critical at this time we record up to those 30,000 tests per day," she said.