diff --git a/test/test_crypto.py b/test/test_crypto.py
index c55a979..d7b8850 100644
--- a/test/test_crypto.py
+++ b/test/test_crypto.py
@@ -14,6 +14,11 @@
         return self.failUnless(*a, **kw)
 
 
+    def assertFalse(self, *a, **kw):
+        return self.failIf(*a, **kw)
+
+
+
 class PKeyTests(TestCase, _Python23TestCaseHelper):
     """
     Unit tests for L{OpenSSL.crypto.PKey}.