Getting uninitialized constant error when trying to run tests

Question

I just updated all my gems and I\'m finding that I\'m getting errors when trying to run Test::Unit tests. I\'m getting the error copied below. That comes from creating new,

Answer 1

As this link suggests http://floehopper.lighthouseapp.com/projects/22289-mocha/tickets/50 it may happen due to preliminary initialization of mocha lib. To prevent it from happeing it is advisable to add line

config.gem 'test-unit', :lib => 'test/unit'

to config/environment.rb