Worked on stabilizing the testing environments for the camunda/camunda repository by addressing compatibility issues with Elasticsearch Docker images. The approach involved reverting the Elasticsearch Docker image tag from version 9.x to 8.19.11 across multiple YAML configuration files, which restored compatibility and reduced flaky tests in both continuous integration and local development runs. This change was carefully tracked in version control to maintain traceability and ensure rollback safety for future upgrades. The work demonstrated a strong focus on DevOps practices, leveraging Docker and YAML to maintain reliable CI pipelines and consistent development environments without introducing new features during the period.