Systems and methods for testing a stylus are described. A processing device determines that a stylus is disposed in a holder above a touch panel that generates position data for each point of contact between the stylus and the touch panel. In response to such determination, the processing device performs one or more tests of the stylus. The processing device may cause the holder to move the across the surface of the touch panel, receive position data, and compare the position data to reference data to determine operation of the stylus.