The Test Course is an extremely large oval circuit that appears in all Gran Turismo games up to and including Gran Turismo 4. In Gran Turismo 5 and Gran Turismo 6 it is replaced by Special Stage Route X. The course is extremely long, with 2 long straights and 2 extremely wide turns. Many players use this course to find out the top speed and acceleration of their cars and is notable for conducting Stopping and Starting license tests.