out ref local?

Seems I am able to do this:

ref int Test1(){
    return ref ints[1];
}

ref int Test1(){
    return ref ints[1];
}

but not this:

void Test2(out ref int a){
    a = ref ints[1];
}

void Test2(out ref int a){
    a = ref ints[1];
}

is there some syntax im missing or is this just not possible?