If you’re building or modifying the Linux kernel, testing is not optional. Linux provides Kernel Selftests (kselftest) under: tools/testing/selftests/ These are small, focused tests designed to exercise individual kernel code paths after you build, install, and boot a kernel. They help detect regressions in areas like syscalls, memory management, networking, security features, namespaces, and more. kselftest is one of the fastest ways to validate kernel behavior and confirm your changes didn’t b