need rspec tests around the wizard flow - i.e. everything that is not part of wizard should be mocked and the correct flow should be tested.

You may need to introduce fakefs to test filesystem ops (which is what heroku and some others do), but at a minimum we need to have a unit test that validates that the various failure paths are checked.  i'd prefer everything be mocked except the item under test.  If you hit coverage issues with the tests (have to have 100% to pass) then remove the requires from wizard and ensure the module calling it mocks out those classes.