rust-clippy/tests/ui/tests_outside_test_module.stderr

error: this function marked with #[test] is outside a #[cfg(test)] module
  --> $DIR/tests_outside_test_module.rs:10:1
   |
LL | fn my_test() {}
   | ^^^^^^^^^^^^^^^
   |
   = note: move it to a testing module marked with #[cfg(test)]
   = note: `-D clippy::tests-outside-test-module` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::tests_outside_test_module)]`

error: aborting due to 1 previous error