diff --git a/src/test/py/test_logical_operations.py b/src/test/py/test_logical_operations.py
index 8c5fd86..d3a8772 100644
--- a/src/test/py/test_logical_operations.py
+++ b/src/test/py/test_logical_operations.py
@@ -39,6 +39,9 @@ class calculationsWithRoots(unittest.TestCase):
     def test_one_zero_0_or_1_equals_1(self):
         self.assertEqual(one_zero(0, 1), 1)
 
+    def test_one_zero_0_or_1_equals_11(self):
+        self.assertEqual(one_zero(1, 1), 1)
+
 
 if __name__ == "__main__":
     unittest.main()