error[E0277]: the trait bound `TestDescAndFn: Testable` is not satisfied --> $DIR/mismatch.rs:9:1 | LL | #[test] | ------- in this procedural macro expansion LL | fn wrong_kind(){} | ^^^^^^^^^^^^^^^^^ the trait `Testable` is not implemented for `TestDescAndFn` | = note: required for the cast from `TestDescAndFn` to the object type `dyn Testable` = note: this error originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.