std::tuple_element and references

I study std::tuple.

Let's we have:

struct test_struct{};

I write

std::cout << typeid(std::tuple_element_t<0, std::tuple<struct test_struct &>>).name();

And I was expecting the type

struct test_struct &

But I received:

struct test_struct

How I can extract type struct test_struct & (preferably using std11)?

Thanks.