Julian Wiesler unified the test suite for the Aleph-Alpha/aleph-alpha-client repository, focusing on improving continuous integration reliability and coverage. By removing the system_test marker from test files, Julian enabled all tests to run uniformly in CI, simplifying configuration and ensuring broader test coverage. The work involved refactoring the test infrastructure using Pytest and Python, with careful attention to maintainability and traceability through well-documented Git commits. Although no bugs were fixed during this period, the changes enhanced the efficiency and consistency of the testing process, laying a foundation for more robust quality assurance and streamlined future development within the project.