Guilty until proven innocent?
In this case, the child cannot be forced to take a test by the school system. That is the law. You say you are concerned with abuse, but evidently judicial abuse doesn't bother you.
Oh, and have you done anything about those barely literate Bears?
Doesn't anyone who supports mandatory testing have a problem with the power it gives the failing public school system over its chief rivals? It'd be like if McDonalds was chosen by the government to certify all other fast food restaurants. And if McDonalds was government run and subsidized and only had two menu choices, both of which were inedible. But we'd better be sure the people over at Burger King are getting healthy food!
What about letting the free market decide whether homeschools or public schools are producing a better product, and keep the government out?