Flaky tests can significantly impact the efficiency of a CI/CD pipeline and merge queue. These tests, which pass or fail randomly due to issues like race conditions, timing dependencies, or unreliable external systems, undermine the reliability of automated pipelines and introduce uncertainty into development workflows. Flaky tests can cause workflow delays, merge queue resets, and developer frustration, highlighting their root causes like timing issues and external dependencies. Adopting strategies such as isolating flaky tests, containerizing environments, and implementing selective testing can mitigate these issues. Leveraging tools like Aviator MergeQueue offers advanced features that can help filter out flaky tests, ensuring that only consistent and stable tests affect the merge process. By addressing flaky tests, teams can maintain a smooth workflow, improve merge efficiency, and focus on delivering high-quality software.