Bjoern Daase improved the reliability of the snowpark-java-scala repository by addressing flakiness in Self-Join tests. He modified the Java API test suite to ensure assertions no longer depended on result-set ordering, making the tests order-independent and more robust. This change, implemented using Java and Scala with a focus on API and unit testing, reduced noise and maintenance overhead in continuous integration workflows. By enhancing test utilities and coverage, Bjoern strengthened the foundation for future cross-language testing in the Snowpark stack. His work demonstrated careful attention to test determinism and contributed to more stable, maintainable automated testing processes.