Qqualification of correction unit consists of a thruster KM-60 and a flow control unit has been completed. Overview of the correction unit tests including lifetime tests is presented in this paper. The maximum correction unit operating time during the test is more than 4120 hours. At that the shown total trust impulse more than 6•105 N•s at 8357 cycles. Average specific impulse shown during maximum lifetime test is more than 1860 s.