diff --git a/script/UnitTest.py b/script/UnitTest.py
index 6b9fd8c..5c4071d 100644
--- a/script/UnitTest.py
+++ b/script/UnitTest.py
@@ -1,4 +1,5 @@
-import unittest
+import ut as unittest
+reload(unittest)
 
 class IntegerArithmenticTestCase(unittest.TestCase):
     def testAdd(self):  ## test method names begin 'test*'