in src/utils/mod.rs [707:714]
fn test_local_sign_key_data_from_invalid_local_key_info() -> Result<(), std::io::Error> {
let cert_file_path = generate_certificate_file()?;
let key_data = SignKeyData::new("/incorrect/pk/path".into(), &cert_file_path);
assert!(key_data.is_err());
Ok(())
}