The invention relates to a method and a control unit for controlling a hybrid driveline comprising an internal combustion engine (ICE) and at least one alternative propulsion unit. The method involves monitoring a predetermined first parameter related to vehicle operation and a second parameter related to the state of an exhaust particle filter, wherein a particle filter regeneration is scheduled when the predetermined second threshold is exceeded. If the first parameter has exceeded or is expected to exceed a predetermined first threshold within a set time period prior to a scheduled particle filter regeneration; then initiation of an on-board diagnostic process is delayed until the particle filter regeneration has been completed. Subsequently, the hybrid driveline is controlled to perform a particulate filter regeneration at the scheduled time and the ICE is operated to perform the on-board diagnostic process.