diff -uNr Cheetah-2.4.2.1.orig/cheetah/CheetahWrapper.py Cheetah-2.4.2.1/cheetah/CheetahWrapper.py
--- Cheetah-2.4.2.1.orig/cheetah/CheetahWrapper.py	2010-01-03 17:13:06.000000000 -0500
+++ Cheetah-2.4.2.1/cheetah/CheetahWrapper.py	2010-10-18 14:59:44.722934490 -0400
@@ -263,7 +263,8 @@
         if '-v' in self.testOpts:
             verbosity = 2
         runner = unittest.TextTestRunner(verbosity=verbosity)
-        runner.run(unittest.TestSuite(Test.suites))
+        results = runner.run(unittest.TestSuite(Test.suites))
+        sys.exit(int(not results.wasSuccessful()))
         
     def version(self):
         print(Version)