In this work the automated generation of test cases is approached. The focus is on the needs of software testers, as a way to mitigate the costs generated with manual testing and to allow a higher quality in the set of tests for software. In this context the architectural design of a tool focused on the automation of the generation of test cases for applications developed with different programming paradigms is developed. Therefore, functional and non-functional requirements were defined to develop this architecture. From these requirements and the attribute of quality, modifiability, it was possible to apply a technique for architecture definition known as Attribute-Driven Design (ADD). The technique allowed the architecture to be developed, however, it was necessary to apply an evaluation technique to verify the level of conformity of the architecture with requirements and the attribute of quality. The evaluation technique used was the Architecture Tradeoff Analysis Method (ATAM). With the evaluation, no conflicts were found between the architecture and the final goal.