Not sure what it's like where you live, but here the administration is the one calling the shots. Teachers follow the orders from them to teach for the stupid tests. They have little or no say in it. They get stressed out. The students get stressed out. The administration doesn't get it. They only want the money and status that comes with the high test scores. Idiots! If they would allow the teachers to really teach the students, they would KNOW the material for the tests.
Make no mistake, I'm not insulating the administration from criticism. Perhaps there are changes that need to be made in the testing regimen. But, the tests in and of themselves aren't a bad idea. If the administration of the test needs to be improved, so be it. But it's pretty clear that the wrote line coming from the unions is that all testing is bad, and they are not the tool that should be used to measure teachers. That is just facially wrong, IMHO.