Mandatory MOTs for vehicles in England, Scotland and Wales will be reintroduced from 1 August.
Drivers have been allowed to delay the test for six months due to the coronavirus pandemic.
In normal circumstances, vehicles must have an MOT on the third anniversary of their registration, and then every 12 months. A number of vehicle parts are checked to ensure they meet safety standards.
Since 30 March, owners of cars, vans and motorcycles have been eligible for a six-month exemption, with that stretching to one year in Northern Ireland.