error: items were found after the testing module
  --> $DIR/block_module.rs:13:1
   |
LL | / mod tests {
LL | |     #[test]
LL | |     fn hi() {}
LL | | }
...  |
LL | |     () => {};
LL | | }
   | |_^
   |
   = help: move the items to before the testing module was defined
   = note: `-D clippy::items-after-test-module` implied by `-D warnings`

error: aborting due to previous error