Along with a rapid increase in the size and complexity of software today, the number of required test cases is also increasing. Generally, a rather significant number of testers should be assigned to a project in order to manage this increase of test cases. It is necessary for such a large team to be able to collaborate and work together efficiently, and we have proposed a test analysis method for black box testing utilizing Test-Categories based on Application Under Test (AUT) and fault knowledge in order to facilitate this activity. This paper illustrates the effectiveness of Test-Categories.