On the develop branch, I'm seeing some unexpected behavior with lein swank:
The workaround is removing the :plugins from project.clj:
:plugins [[lein-midje "1.0.8"]
$ git clone https://github.com/reddmetrics/forma-clj.git
$ cd forma-clj
$ lein swank
Fix issue #54.
Thanks! Pull request onto develop for this fix:
Fixed and merged in 671e7fd.