Apparatus and methods for pressure testing of conduits, tools, vessels, devices, or combinations thereof are described, which include a first testing unit having a first pump operable at a first pressure and a second testing unit having a second pump operable at a second pressure, both positioned in a housing. An auxiliary pump may be directly coupled with the output of one or both testing units to facilitate rapid achievement of a selected pressure. The testing units additionally include embodiments having electronic pressure control systems for rapid pressurization and remote control ability. Efficient, simultaneous testing of multiple objects, at differing pressures, is thereby possible, or alternatively, the second testing unit may be used for backup or redundancy purposes, or to further facilitate rapid achievement of the selected pressure by the first testing unit.