error: the borrowed expression implements the required traits
  --> tests/proptest.rs:18:16
   |
18 |     DID::parse(&input).unwrap();
   |                ^^^^^^ help: change this to: `input`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
   = note: `-D clippy::needless-borrows-for-generic-args` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::needless_borrows_for_generic_args)]`