Now the tests work again.

lib/python/DateTime/tests/testDateTime.py

@@ -2,13 +2,15 @@
 # To run these tests, use:
 #   python unittest.py DateTime.tests.suite
 
-import os
 import unittest
 from DateTime import DateTime
 import string
 import math
 import time
 
+import os
+__basedir__ = os.getcwd()
+
 class DateTimeTests (unittest.TestCase):
 
     def _compare(self, dt1, dt2, ms=1):