Worked on enhancing the unit testing documentation for the cositools/cosipy repository, focusing on streamlining the setup process for both local development and continuous integration environments. The contribution involved updating the unit_tests.rst file written in RST to clarify the correct pip command syntax for installing pytest and pytest-cov, ensuring that developers can reliably set up testing dependencies. By improving the readability and accuracy of the documentation, the work reduced onboarding friction and supported more consistent test execution. The effort centered on documentation skills and RST language, addressing a key aspect of developer experience without introducing new features or bug fixes.