This paper presents preliminary ideas to include a kind of built-in self-test for systems embedded software components. The study promotes contract-based testing applied to AADL modeling of hardware/software systems. The aim is first to help evaluating the testability of software components embedded in such systems, and next to improve the integration step, especially in the context of COTS design and development. We introduce an architecture to include a generic test system inside an AADL model, and then test specifications to handle the testing process. The paper exposes the main ideas of the proposed approach and its modeling but no implementation work. Next stage is an implementation work to assess the feasibility and the benefits of the proposed approach.