Unit tests are essential for software delivery and testing pipelines as they provide a solid foundation for other types of testing. To get the most out of unit testing, it's crucial to test earlier and more frequently, making sure that developers own the quality of their code. This includes writing unit tests that take minutes to write and seconds to run in parallel, focusing on one thing per test. Adopting GitOps with dry runs can also ensure good code makes it through to production while flagging bad code before a commit. Furthermore, leveraging headless testing in the cloud enables developers to write tests quickly and get feedback in near-real time, making unit testing faster and more efficient. By implementing these best practices, DevOps teams can enjoy a faster pace of deployment and highly usable applications.