[dogamak]

Additionally tests in "tests/" are compiled to independent binaries on which the test suite is run on separately, which results into verbose and redundant output when ran.

Also if you keep your tests under "src/", you can't just stick them wherever you want; you need to have #[cfg(tests)] on every module declaration leading to the test function, otherwise the test is ignored silently. From time to time I find old tests that have not ran once because of a missing attribute somewhere upwards the module hierarchy.

[steveklabnik]

Hm, cfg(tests) should only control if they're included in non-test builds; it shouldn't ignore them entirely.