error: `#[doc(test(...)]` takes a list of attributes
  --> $DIR/doc-test-attr.rs:3:8
   |
LL | #![doc(test)]
   |        ^^^^
   |
   = note: `#[deny(invalid_doc_attributes)]` on by default

error: `#[doc(test(...)]` takes a list of attributes
  --> $DIR/doc-test-attr.rs:5:8
   |
LL | #![doc(test = "hello")]
   |        ^^^^^^^^^^^^^^

error: unknown `doc(test)` attribute `a`
  --> $DIR/doc-test-attr.rs:7:13
   |
LL | #![doc(test(a))]
   |             ^

error: aborting due to 3 previous errors