Tests violate DRY ?

[prathamlahoti123]

While exploring the tests suites of the project, I found that certain components for testing are redefined in multiple files. For example, the fixture to get test HTTP-client, database management components such as definition of session_maker, fixture to prepare the database, and so on. Is there some specific logic in such an approach? Wouldn't it be a better way to declare such functionality in a form of fixtures in one place (or place some general functionality into tests.common.py), and then reuse it where needed ?