In this thesis, the author wants to discuss the problematics that arouse while working with the Self-Test procedures that are conducted online in a multicore context. Self-Test procedures have not been considered until now for their use on caches-based systems due to the lack of proof of their deterministic behavior when executing instructions. Execution in cache and deterministic are concepts considered exclusive one to each other. If we add to this conception the execution of those procedures on multicore context, the bus contention produces a strong timing unpredictable system. Having Online Self-Test procedures being executed under those conditions might lead to a variation in the fault coverage or the failure of the software test.