The growth and popularity of the Web has fueled the development of software-based network. The use of multi-agent systems (MAS) in this context is considered a promising approach has been applied in different areas such as security, or mission critical business scenarios, enhanced monitoring of environments and people, etc., which means analyzing the choices that this type of software can become crucial. However, the methodologies proposed so far by the Software Engineering Oriented Agents (AOSE) focused their efforts mainly on developing disciplined approach to analyze, design and implement an SMA and little attention has been given to how such systems can be tested. Furthermore, with regard to tests involving software agents, some issues related to the controllability and observability difficult the task of checking the behavior, such as: (i) the duration of the agent in its decision-making process; (ii) the fact of the agent s beliefs and goals are embedded in the agent itself, hampering the observation and control of behavior; (iii) problems associated with test coverage. In this research a novel approach for unit testing of agents written in BDI4JADE BDI based on the combination and arrangement of ideas supported by JAT Framework, a framework for testing agents written in JADE and fault model proposed by Zhang is displayed.