Worked on improving test reliability in the apache/doris repository by addressing instability in backup authentication tests. Focused on automation and software development using Groovy, the developer introduced a nonConcurrent flag to the test suite, which prevented lock contention during backup operations. This targeted fix reduced flaky failures and minimized CI noise, enhancing confidence in the backup workflow without altering existing backup paths or impacting performance. Demonstrated skills in testing, concurrency management, and repository maintenance by delivering a precise solution with minimal code changes, contributing to a more stable continuous integration process for the Doris project during the reported period.