assert_raise broken with Rails 2.2.2 upgrade

Trying to upgrade to Rails 2.2.2 and all of my assert_raise tests are failing. It appears that my rescue_action method is being called but not reraising the Exception. In Rails 2.1.2 and all the other versions I've used the exception would be reraised.

I haven't been able to find any hint as to what to change. I figured it has something to do with the new exception handler stuff but haven't had any luck yet.

Any help is appreciated.