A diagnostic apparatus for testing a milking point of a milking machine includes sensors for measuring fluid-transport related parameters, including various pressure levels and/or flow values relating to a set of teatcups includes a controllable valve and a set of test tubes. Each test tube is configured to be attached to one teatcup, where the controllable valve selectively arranges a particular one of the test tubes for measurement of at least one parameter via one of the sensors in response to a control signal. The measurements are performed while all the teatcups are simultaneously attached to the test tubes and an external vacuum pressure is applied either on a milk-line side of the controllable valve or on a side opposite to the milk-line side relative to the controllable valve.
