A method for testing an open roof assembly, wherein the open roof assembly comprises a frame having a roof opening, a moveably arranged closure member and a motor drive assembly for moving the closure member, wherein in a closed position the roof opening is covered by the closure member and in an open position the roof opening is at least partly uncovered, the method comprising a. providing a test device, the test device comprising a generic control unit, a force sensitive sensor operatively coupled to the generic control unit and configured to output force data representing a force exerted on the force sensitive sensor, a drive circuitry operatively coupled to the generic control unit and configured to operate the motor drive assembly of the open roof assembly, an electrical current sensor configured to output current data representing an electrical current to a motor of the motor drive assembly and a displacement sensor configured for outputting displacement data representing a displacement of the closure member; b. operatively coupling the motor drive assembly to the drive circuitry; c. positioning the force sensitive sensor in the roof opening; d. operating the generic control unit to d1. move the closure member from the open position to the closed position such that the closure member collides with the force sensitive sensor; d2. receive the corresponding force data from the force sensitive sensor and to receive the current data and the displacement data, wherein the current data and the displacement data correspond to step d1; and characterized by further operating the generic control unit to d3. determine from the force data a system property constant, wherein the system property constant is representative for a maximum pinch force of the open roof assembly, and wherein the system property constant is a torque-related constant correlating the electrical current supplied to the motor and a generated torque; and d4. predict a maximum pinch force based on the determined torque-related constant. a. providing a test device, the test device comprising a generic control unit, a force sensitive sensor operatively coupled to the generic control unit and configured to output force data representing a force exerted on the force sensitive sensor, a drive circuitry operatively coupled to the generic control unit and configured to operate the motor drive assembly of the open roof assembly, an electrical current sensor configured to output current data representing an electrical current to a motor of the motor drive assembly and a displacement sensor configured for outputting displacement data representing a displacement of the closure member; b. operatively coupling the motor drive assembly to the drive circuitry; c. positioning the force sensitive sensor in the roof opening; d. operating the generic control unit to d1. move the closure member from the open position to the closed position such that the closure member collides with the force sensitive sensor; d2. receive the corresponding force data from the force sensitive sensor and to receive the current data and the displacement data, wherein the current data and the displacement data correspond to step d1; and d1. move the closure member from the open position to the closed position such that the closure member collides with the force sensitive sensor; d2. receive the corresponding force data from the force sensitive sensor and to receive the current data and the displacement data, wherein the current data and the displacement data correspond to step d1; and d3. determine from the force data a system property constant, wherein the system property constant is representative for a maximum pinch force of the open roof assembly, and wherein the system property constant is a torque-related constant correlating the electrical current supplied to the motor and a generated torque; and d4. predict a maximum pinch force based on the determined torque-related constant.