Flaky Tests: How to Find, Fix, and Prevent Them

Flaky tests, which are automated tests that yield inconsistent results without code changes, consume significant developer time and cost engineering companies millions due to lost productivity. These tests arise from issues like timing problems, test pollution, unstable infrastructure, and race conditions. AI-powered detection and modern CI platforms, such as Harness CI, can automatically identify, quarantine, and isolate flaky tests, thereby maintaining signal quality without manual intervention. This approach not only restores developer trust in test results but also enhances productivity by reducing time spent on false investigations and reruns. Addressing flaky tests involves systematic detection, quarantine, and remediation, alongside implementing best practices to prevent new flaky tests from emerging. By doing so, teams can achieve faster feedback loops, lower infrastructure costs, and cultural improvements in testing practices.