Systems, apparatus, methods, and computer program products relate to measuring the combined accuracy of a gas meter and a volume corrector as a system. The measurement is performed with a transfer prover, and may be performed automatically on either integrated or non-integrated volume correctors and meters. In one embodiment, a test interface provides a convenient connection with controllable data switches for routing information between the meter/volume corrector, the transfer prover, and a processing device. Software running on the processing device can automatically configure the parameters for performing a combined accuracy test by downloading parameters from the meter/corrector and transfer prover via the test interface. Upon user selection of the test type, and optionally flow rates, for running the test, the software may configure data switches on the test interface to automatically perform the selected combined accuracy test.