Abstract: The method for testing and, if necessary, validating the primitives of a real-time executive embodying the invention consists in having a succession of operation phases executed by a set of concurrent tasks of the real-time executive, under the direction of a driver task which organizes the working of the concurrent tasks, and which regulates launching and detects completion thereof. Each operation phase comprises the random selection of a launching mode, launching of the concurrent tasks, freeing from their standby status, detection of the arrival of each of the concurrent tasks at the end of its route and memorization of characteristic primitives of the operation phase that has just taken place. The invention enables validation of the real-time executives used notably in the fields of aeronautics, space, nuclear sector, railways, medicine and even robotics.