I've managed to run all my Specs2 tests in IDEA 13.1.4 and the more recent 14.0.1 using All in package
for Test kind
and In whole project
or In single module
for Search for tests
. I left Test Package
field empty.
I had to create this configuration manually.
You may want to use Ctrl+Shift+F10 to create a Specs2 configuration and then modify it accordingly.