Premier Steven Marshall indicated a tough lockdown for the state's nearly two million people would end late today, at least two days earlier than planned.
The man's lie resulted in drastic action in South Australia, leading authorities to believe they were dealing with a more contagious version of the virus than was actually the case, thanks to fears he may have picked it up from a pizza box.
South Australian authorities have announced that the lockdown will be lifted on Saturday at midnight and the ban on outdoor exercise and dog walking will be revoked too.
A Woodville Pizza Bar employee lied to contact tracers about working at the restaurant, which led to a state-wide lockdown in South Australia, officials said on Friday. Around 5,400 who were in close contact with the infected persons were placed under quarantine.
Grant Stevens, the state's police commissioner, said the state would not have gone into lockdown had the person not lied.
When asked whether the pizza parlour would receive extra security after his announcement due to public anger, Stevens said, "There are all sorts of things we are considering at this point".
"Providing false and misleading information that involves a global pandemic is a serious issue we take very seriously", he said.
"The emergency management act requires people to provide information on request".
All the new and suspected cases are already in quarantine, with the total number of people in isolation rising to more than 4500.
South Australia made a decision to enter a state-wide lockdown after learning a man with Covid-19 had lied about his link to a pizza shop, police say.
She said efforts were continuing to put a "double ring-fence" around the outbreak to limit the risk of more widespread transmission.
On Saturday morning, SA reported one new case in the past 24 hours, which was a close contact of a previous case and linked to the Parafield cluster, the northern suburbs of Adelaide, capital city of the state.
However, Mr Marshall added that the threat to his state from the cluster of cases has not passed.
Anyone in South Australia is still urged to get tested as soon as they develop even the mildest symptoms.
The new restrictions came into effect at 12:01 on Thursday 19 November, with all South Australians required to stay home for the next six days and only able to leave home for essential purposes.
While authorities are clearly not very happy with the individual, there is also concern that there may be recriminations against his employer, with a police auto remaining parked outside the Woodville Pizza Bar to guard it.