diff --git a/unittest/unittest.py b/unittest/unittest.py
index 5d0469da..f8db373f 100644
--- a/unittest/unittest.py
+++ b/unittest/unittest.py
@@ -35,6 +35,9 @@ class TestCase:
                 return
             raise
 
+    def assertFalse(self, x, msg=''):
+        assert not x, msg
+
 
 def skip(msg):
     def _decor(fun):