A brake system for a commercial vehicle, the brake system preferably comprising a vehicle axle with at least one wheel end, the brake system comprising a) a pneumatic brake actuator arranged or arrangeable at a wheel end of a vehicle axle, b) an electro-pneumatic brake path generating an electro-pneumatic brake pressure dependent on an electric brake control signal and c) a redundancy brake path, d) a fail-safe valve which da) in a first switching state connects the electro-pneumatic brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the electric brake control signal and db) in a second switching state connects the redundancy brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the redundancy brake path and dc) comprises an electric control port and dd) is transferred into the first switching state by energizing the electric control port and de) comprises a return means which returns the fail-safe valve from the first switching state into the second switching state when the electric control port is not energized e) an electronic control system characterized in that e) the electronic control system comprises control logic which performs a test procedure for testing the operation ea) of the electro-pneumatic brake path (6a; 6b) and/or eb) of the redundancy brake path or a pneumatic brake path. a) a pneumatic brake actuator arranged or arrangeable at a wheel end of a vehicle axle, b) an electro-pneumatic brake path generating an electro-pneumatic brake pressure dependent on an electric brake control signal and c) a redundancy brake path, d) a fail-safe valve which da) in a first switching state connects the electro-pneumatic brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the electric brake control signal and db) in a second switching state connects the redundancy brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the redundancy brake path and dc) comprises an electric control port and dd) is transferred into the first switching state by energizing the electric control port and de) comprises a return means which returns the fail-safe valve from the first switching state into the second switching state when the electric control port is not energized da) in a first switching state connects the electro-pneumatic brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the electric brake control signal and db) in a second switching state connects the redundancy brake path to the pneumatic brake actuator so that the pneumatic brake actuator is controlled by the redundancy brake path and dc) comprises an electric control port and dd) is transferred into the first switching state by energizing the electric control port and de) comprises a return means which returns the fail-safe valve from the first switching state into the second switching state when the electric control port is not energized e) an electronic control system e) the electronic control system comprises control logic which performs a test procedure for testing the operation ea) of the electro-pneumatic brake path (6a; 6b) and/or eb) of the redundancy brake path or a pneumatic brake path. ea) of the electro-pneumatic brake path (6a; 6b) and/or eb) of the redundancy brake path or a pneumatic brake path.