diff --git a/tests/test_coding/test_optionals.py b/tests/test_coding/test_optionals.py
index 290934ec588e9ed1952d1c448db803baf1064b00..80a164bbf577040edd427bfa87163667e08f880e 100644
--- a/tests/test_coding/test_optionals.py
+++ b/tests/test_coding/test_optionals.py
@@ -8,6 +8,7 @@ class TestOptionals(unittest.TestCase):
     def test_extract_optional(self):
         b = Optional(None)
         self.assertIs(extract_optional(b.test.value), None)
+        self.assertEqual(extract_optional(5), 5)
 
     def test_optional(self):
         b = Optional(None)