1. A tire testing machine, comprising: a testing station for performing a test on a tire; a marking device for printing a mark based on a result of the test performed by the testing station, in a predetermined mark position of the tire after undergoing the test; a recipe storage device for previously storing therein contents of the test to be performed on the tire by the tire testing machine and a first marking setting condition for the marking device as a recipe; a marking specification storage device for storing therein a second marking setting condition for the marking device, which second marking setting condition is not stored in the recipe; an input device for inputting the second marking setting condition to the marking specification storage device; a tire testing control unit for allowing the testing station to perform the test on the tire in accordance with the contents of the test stored in the recipe; a selection input device for selecting which of the first marking setting condition and the second marking setting condition is to be used as the marking setting condition for the marking device at the time of performing the test on the tire by the testing station; and a marking control unit for allowing the marking device to perform the marking in accordance with the marking setting condition selected by the selection input device.