A wellbore servicing system and method are disclosed. The wellbore servicing system includes a casing string, a pressure testing valve, and a floating piston assembly. The pressure testing valve includes a housing and a sliding sleeve. The floating piston assembly is slidably disposed between the housing and the sliding sleeve. The sliding sleeve is slidably positioned within the housing and is transitional from a first position to a second position and from the second position to a third position. When the sliding sleeve is in the first or second positions, it blocks fluid communication via ports in the housing.