Tesla Model S quality test By Bart Volgers on 2 June 2014 in Engineering, Model S, Tesla 0 Each Model S is tested thoroughly before it leave the factory. From water, drive and break tests to passing an extensive checklist. Testing a Model S takes five hours, before it’s ready for the road. Related posts: Manufacturing a Tesla Model S So You want to drive a Tesla Model S Tesla Model S Coast to Coast Record for Electric Cars How the Tesla Model S factory was conceived manufactory, Model S, Tesla