A apparatus is provided for carrying out an optical test method for a gearwheel. The testing apparatus includes a first camera for capturing image data of a first type of tooth flanks of the gearwheel to be tested, a position sensor for determining a rotational position of the gearwheel to be tested, a control device for evaluating the rotational position determined by this position sensor and for controlling the camera on the basis of this turning position, and a first illuminating device designed for illuminating an area of the gearwheel to be tested, which area is provided for capturing the image data.