This article discusses the use of Bazel, an open-source tool designed to automate software builds and testing, particularly in large projects with multi-language dependencies, to improve automated test suites within a continuous integration and delivery (CI/CD) workflow. Bazel's key features include caching, which prevents redundant testing by only rebuilding necessary components, and parallel execution, which enhances resource efficiency and throughput. The article provides a step-by-step tutorial on setting up a Python project with Bazel, demonstrating how to configure workspaces and utilize BUILD files to manage the build and test processes. It highlights Bazel's compatibility with multiple languages and platforms, as well as its ability to define custom rules, offering flexibility and scalability to software engineers. Additionally, the article mentions Earthly, a complementary tool that enhances build processes by providing reproducible and portable pipelines through containerization, further optimizing testing and development timelines.