Urine test strip, illustration. Urine test strip being compared to the results chart on the testing kit bottle. The strip contains multiple test areas designed to change colour to indicate positive or negative results after being dipped in urine. The colours displayed can then be compared to a results chart on the testing kit. For example, glucose or protein levels in the urine could be examined using these test strips. Urine analysis like this is used to test for and diagnose diabetes, kidney problems and urinary tract infections.