Is it bad to have Unit Tests return async void?

I know it is bad practice to have a method return async void since it makes it hard to test, but is there any reason that a unit test needs to return async Task rather than async void?

Basically is this ok:

[Test()]
public async void MyTest()
{
    //Some code to run test
    //Assert Something
}

Or should I be doing this:

[Test()]
public async Task MyTest()
{
    //Some code to run test
    //Assert Something
}