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.