An automated peritoneal dialysis system (A) for performing continuous preritoneal dialysis is disclosed which includes a supply (B) of unsterilized dialysate for supplying large volumes of dialysate on demand and a fluid circuit for delivering dialysate from the supply to the patient's peritoneal cavity and draining spent dialysate from the periotoneal cavity. A dialysate sterilization component (C) includes at least one in-line sterilization filter assembly (E, F) disposed in the inflow line segment for real time sterilization of the unsterilized dialysate during flow of dialysate prior to patient delivery. A filter test component (D) is operatively associated with the sterilization filter assembly (E, F) for conducting a real time integrity test on the filter assembly (E, F) to test for a filter failure which would allow contaminants into the dialysate prior to patient delivery.