Give it time to evolve. The next step will be for the rise of "accreditation institutes" who will offer testing to determine one's level of competence in a discipline (kind of like the "Professional Engineer's Exams" of today). You pass the test, you get the accreditation. These will probably first be done by the professional societies like the American Chemical Society, American Physics Society, and so forth.
Traditional tests are expensive to give and score so they are only done at major mileposts, however internet technology changes all that. Rather than giving one time tests, earners should be required to maintain their competency on an ongoing basis to maintain their certification, at least at a minimal level. That certification would be worth much more than a one time dead tree certificate.