How can I test hydraulic brakes for leaks effectively?

To test hydraulic brakes for leaks effectively, first, inspect the brake lines and connections for any visible signs of leakage. Next, press the brake pedal several times to build up pressure in the system. Then, use a piece of clean cardboard or paper towel to check for any fluid drips or wet spots near the brake components. If any leaks are detected, repair or replace the faulty components immediately to ensure safe braking performance.