The US Department of Education is planning the most massive and expensive testing program ever seen on the planet, far exceeding the already unacceptable level of testing demanded by NCLB. The feds are adding interim tests, possible pretests (to measure improvement), are encouraging testing in all subjects, and now they have announced plans to test pre-kindergarten children ("kindergarten readiness tests; http://bit.ly/kabuqh). I assume we will soon see plans for pre-school readiness testing.
There is no evidence that the new tests will help children. If they fail, students and teachers will suffer, but testing companies will keep their profits and will get to try again.