During November 2024, Mikhail Alekseev focused on improving test reliability for the Altinity/ClickHouse repository by addressing a key issue in the test runner script. He enhanced fasttest_runner.sh to dynamically resolve the path to process_functional_tests_result.py using the FASTTEST_SOURCE variable, ensuring the test result processor executes correctly in both CI and local environments. This shell scripting solution reduced test flakiness and accelerated feedback cycles by making test execution more robust across different contexts. Mikhail applied his expertise in CI/CD, shell scripting, and testing, delivering a targeted fix that improved the reliability and maintainability of the project’s automated testing pipeline.