test brake lights

https://preparemotcorner.almoheet-travel.com/how-to-prepare-for-mot-a-driver-s-guide-to-a-first-time-pass

I always give the brake lights a quick test before a long drive—press the pedal while someone watches from behind, or use a reflective surface if you're alone. A burned-out bulb is easy to miss until it's dark or you need to stop suddenly, and it's a common reason for getting pulled over. Checking both sides and the center high-mount light takes seconds and keeps everyone safer.