Abstract: For the testing and cleaning of instruments (20) with continuous channels (25) for minimal invasive surgery or minimal invasive examination of body cavities, use is made of a testing and cleaning tray (10) for the instruments (20), which testing and cleaning tray (10) has flushing channels (30; 31), and of a holder arrangement (41) which receives this tray (10) and has attachments for each flushing channel (30). A fluid source (47) is connected via a distributor (56) to valves (57) and to the attachments of the holder arrangement (41). Using a throughput testing device (46; 55), the channels (25) of the instruments (20) are tested for penetrability individually or in groups one after another by means of fluid from the fluid source (47) being conveyed to the channels (25).