CodeIgniter Class CIUnit_TestCase not found

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http://serverfault.com – Locally I have a CodeIgniter site set up that uses PHPUnit and CIUnit for unit testing. Everything works fine here. I go into the test dir and type PHPUnit and all the tests run fine. Yay Now I set up a build server, installed Hudson and PHPunit and have everything set up, but it errors. So I manually tried to go into the directory /var/lib/hudson/jobs/website/workspace/tests and type phpunit and I now get an error saying: Fatal error: Class 'CIUnit_TestCase' not found in /var/lib/hudson/jobs/website/workspace/tests/controllers/CI_Unit_Test_class_Test.php on line 8 The code is pulled in (HowTos)