Unbreaking Rake Tests "post_test" and "post_controller_test"

While trying to figure out what breaks the build i came up with this diff.
Stil curious about the reason, right now i can only think of the "bla.rb"
not being escaped and therefore causing a problem.

Successful Build with diff applied:
https://travis-ci.org/h5b/graveio/builds/13054949