A MEMS accelerometer includes at least one proof mass and two or more drive electrodes associated with each proof mass. Self-test signals are applied to the drive electrodes. The self-test signals have a signal pattern that includes different duty cycles being applied to the drive electrodes simultaneously, which in turn imparts an electrostatic force on the proof mass. The response of the proof mass to the electrostatic force is measured to determine a sensitivity of the MEMS accelerometer.