When running rspec you usually have to wait for all tests to be finnished before you can see the failed tests.
The gem fuubar provides a formatter for rspec that displays the failures right when they appear. Just add it to your Gemfile and be sure to have the following options in your
--format Fuubar --color
If you want rspec to bail out on the first failed test you can add the option
--fail-fast to you
.rspec as well.