There are unit tests for the Linux kernel and even a kernel-specific unit-test framework. See: https://kernel.org/doc/html/latest/dev-tools/kunit/ https://kerne

There are unit tests for the Linux kernel and even a kernel-specific unit-test framework. See: https://kernel.org/doc/html/latest/dev-tools/kunit/ https://kernel.org/doc/html/latest/dev-tools/kunit/ Here is an article about the various ways Linux is tested: https://embeddedbits.org/how-is-the-linux-kernel-tested/ https://embeddedbits.org/how-is-the-linux-kernel-tested/ Unit tests are just a small part of the array of automated testing used.