Queensland-based teams have taken to Queensland Raceway in Ipswich for pre-season testing.
Red Bull Ampol Racing, Shell V-Power Racing Team and Matt Stone Racing are all clocking mileage on Wednesday.
Wednesday's running marks the first official hit-out for the Queensland teams in their Supercars following a number of Gen3 prototype test days.
PremiAir Racing, which has plans to work out of a Gold Coast base, will test at Queensland Raceway next week.
Victorian teams will tackle Winton Motor Raceway next Tuesday.
Check out some of the best shots from a busy morning at Queensland Raceway.