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Unit tests, integration tests, UI layer tests - it won’t come as a surprise that we ❤️ testing at CircleCI. Improving your tests, whether learning something new about TDD, or fixing flaky tests, will improve the entire CI process and make software delivery smoother, faster, and more predictable.

A pyramid supports a cube made up of stylized software elements.
Two sets of stylized development components flank a laptop computer.
An engineer sits at a desktop running dynamic security tests on a web application.
No Downtime - v1
Developer C sits at a desk working on an intermediate-level project.