Apple Inc is leasing a small fleet of cars from rental company Hertz Global Holdings Inc to test self-driving technology, Bloomberg recently reported.

Apple is renting Lexus RX450h sport-utility vehicles from Hertz’s Donlen fleet-management unit, according to the Bloomberg report, citing documents released recently by the California Department of Motor Vehicles. The document listed Donlen as the lessor and Apple as the lessee.

The iPhone maker is concentrating on technology for self-driving cars, Chief Executive Tim Cook said earlier this month in an interview with Bloomberg.

The competitors Alphabet Inc (self-driving car unit Waymo) and Avis Budget Group Inc announced a similar partnership recently to offer fleet support and maintenance services for its fleet of autonomous vehicles.