If authorities decide more testing is required,the start of services will be shifted to the following weekend of December 14-15.
Transport Minister Andrew Constance said the government would confirm the date once it was satisfied the final stages of testing were complete.
"The main priority at this stage is to make sure we’ve crossed everything off the checklist first,"he said on Tuesday."We're still on track to have it open by Christmas,but the main focus ... is ensuring everything is operating as it should be before we get customers on board."
Trams begansimulating the timetable for services last weekend,a process that will continue until they start carrying passengers.
While the trams will run until 1am when fully operational,the government is prepared tooperate them lateron weekends if there is demand,as part of efforts to revive the night life once lockout laws are relaxed.