We know several manufacturers use South Africa for high speed and hot-weather testing. A couple that spring to mind are Mercedes-Benz, Porsche, Audi and Volkswagen.
The original Bugatti Veyron was also tested in South Africa and now we know that Bugatti is continuing to use our roads for test purposes after we discovered this video.
Bugatti invited a journalist from US magazine Motor Trend to join it on a test day.