exclude tests directory

[AlbanMinassian]

How exclude coverage in /tests directory when i have this

src/lib.rs:

pub fn add_two(a: i32) -> i32 {
    internal_adder(a, 2)
}

fn internal_adder(a: i32, b: i32) -> i32 {
    a + b
}

tests/ integration_test.rs:

extern crate adder;

#[test]
fn it_adds_two() {
    assert_eq!(4, adder::add_two(2));
}

Thanks
Ami44