The embodiment of the application provides a display panel test circuit, a system and a method. The circuit includes: a first linkage unit for receiving a test drive signal; a second linkage unit forreceiving a test control signal; and a first gate trace and a second gate trace which are connected to the first linkage unit. The first gate trace and the second gate trace are respectively used forconnecting to one end of a first gate drive wire and one end of a second gate drive wire. The other ends of the first gate drive wire and the second gate drive wire are both connected to a control endof a drive control device of a display panel. A controllable component is connected in series on the first gate trace and/or the second gate trace. A control end of the controllable component is connected to the second linkage unit. The circuit provided by the embodiment can help solve the problem that the gate signal defect detection capability of a display panel driver cannot be improved in theprior art.