UML Testing Profile (UTP) is one of the methods to describe a test architecture. We proposed UTP extension with the concept of the test aspect in order to make it easier to derive test requirements and test cases by means of UTP. The test aspect is like an engineers’ concern to be tested. We mentioned that extracting test aspects and creating test aspect model could assist in deriving test requirements and complementing the development model. On the other hand, we observed that the way of extracting test aspects and creating test aspect model depended on engineers. In this paper, we propose how engineers create better test aspect model.