Test point A “test point” is a location on a circuit, system, or during a software process that allows for monitoring, measurement, or control. In electronics, a test point is a physical location on a PCB to inject signals or check voltages, while in hydraulics, it’s a fitting to connect gauges or take samples. In a mathematical context, it’s a value or point used to evaluate a function’s behavior, and in software testing, it represents a specific combination of a test case, configuration, and tester.