Template Unit Test Framework

Right, my bad I've forgotten about that. However, it must be a bug in your code still.
I've just tested this concept and it compiles perfectly well:

#include <tut.hpp>

template <typename T>
struct Blob
{
T data;
};

namespace tut
{
struct blob_data
{
struct blob
{
int value;
};
};

typedef test_group<blob_data> group;
typedef group::object object;
group mytest_group("mytest");

template<>
template<>
void object::test<1>()
{
Blob<blob> b;
b.data;
b.data.value;
}

} // namespace tut