Sentry is celebrating the holiday season by highlighting twelve of its partners with an ornament each day on its festive Sen-Tree, starting with Travis CI. Sentry uses Travis CI to run automated tests for its own project and also offers integration with other platforms and languages. Both companies share values of open-source principles, accountability, and continuous improvement, which aligns with Sentry's mission to empower developers. The partnership between Sentry and Travis CI is built on mutual respect and a shared commitment to empowering developers, making it an ideal fit for the 12 Days of Partners series.