Harness Test Intelligence (TI) is an innovative feature introduced in October 2022 that significantly reduces test execution time by up to 90% for Ruby projects and supports multiple programming languages including Java, Kotlin, Scala, and C#. By using machine learning, TI determines which subset of tests needs to be executed based on changes in the source code, thereby optimizing the software development lifecycle without sacrificing quality or increasing costs. This approach allows companies to deliver high-quality software rapidly and efficiently by focusing only on tests relevant to recent code changes, thus aligning with the project management triangle of time, resources, and scope. TI's efficiency makes Harness CI up to four times faster than other CI solutions, providing a substantial advantage for companies aiming to innovate without compromising on feature scope or quality. The feature is particularly beneficial for projects with extensive test suites, such as the open-source project Vagrant, where it has been demonstrated to reduce test times by over 90% compared to other CI providers.