diff --git a/src/test/py/test_logical_operations.py b/src/test/py/test_logical_operations.py
index e4aa78d..364d887 100644
--- a/src/test/py/test_logical_operations.py
+++ b/src/test/py/test_logical_operations.py
@@ -24,6 +24,9 @@ class calculationsWithRoots(unittest.TestCase):
     def test_conjunctive_identity_0_and_0_equals_None(self):
         self.assertEqual(identity_conjunctive(0, ".", 0), None)
 
+    def test_conjunctive_identity_1_and_0_equals_None(self):
+        self.assertEqual(identity_conjunctive(1, ".", 0), None)
+
 
 if __name__ == "__main__":
     unittest.main()