Use typedefinition from other class in constructor of templated class

Question

I am trying to make a class where the constructor takes in a parameter of a type corresponding to a typedefinition defined in the templated class. Please see the following illustrational snippet which does not compile.

class A
{
    typedef enum test_t {
        a1,
        a2,
        a3
    } test_t;
};

template <class T>
class B
{
    B(T::test_t obj);
};

template <class T>
B<T>::B(T::test_t obj)
{

}

// Explicit definition to let compiler know a template instantiation
template class B<A>;

When compiling this code I get the following errors:

TemplatedClassTest.cpp:13:14: error: expected ‘)’ before ‘obj’

TemplatedClassTest.cpp:17:8: error: expected constructor, destructor, or type conversion before ‘(’ token