Another option, if you want immediate information about a failure is to change the format to be documentation, that way you will see the details of any given failure as it happens.
You set this by running rspec
with the --format documentation
option. It can also be put in your spec_helper.rb as a permanent option for that repository (though can be overriden at the command line).
The downside to this approach is that you now get a lot wordier output and in fact earlier output will scroll off, so this option works best if you are going to keep the terminal window open and visible somewhere so you can see when errors come up. Doesn't require direct attention as peripheral vision can be used and of course you can scroll back at any point. Works better for smaller repositories with hundreds rather than thousands of tests.