Rspec killed my autotest

I've been running autotest quite happily, then decided to install the rspec and rspec-rails plugins to do some story writing. Now my autotest reports this:   loading autotest/rails_rspec   /usr/local/bin/ruby -S script/spec -O spec/spec.opts

and doesn't run any tests. I can't find anywhere how to get autotest back on track running the tests in my test directory. Any pointers would be appreciated. Thanks.