A lap done on arrival at a circuit, testing functions such as throttle, brakes and steering before heading back to the pits without crossing the finish line.

• 一般车队一抵达赛道，就会让赛车完成一圈以测试其功能，例如油门、制动装置和转向等。（一圈末了直接驶回维修站而不用穿过终点线）