Worked on the flipperdevices/u-boot repository to modernize the FIT signature testing documentation, focusing on transitioning from a legacy shell script to a pytest-based workflow. Updated the documentation written in reStructuredText (rst) to provide clear, reproducible instructions for running tests using pytest with sandbox configuration. This change streamlined the onboarding process for new contributors and reduced maintenance overhead by removing outdated references to vboot_test.sh. Demonstrated skills in technical documentation and testing, emphasizing clarity in communicating test procedures. The work improved the overall developer experience by ensuring that testing steps are explicit, up-to-date, and aligned with current best practices.