diff --git a/tests/test_w3w.py b/tests/test_w3w.py
index d6b2dbc..295e4bb 100644
--- a/tests/test_w3w.py
+++ b/tests/test_w3w.py
@@ -243,6 +243,8 @@ def test_is_possible_3wa(self):
         self.assertTrue(self.geocoder.is_possible_3wa(possible_3wa))
         invalid_3wa = "index.home"
         self.assertFalse(self.geocoder.is_possible_3wa(invalid_3wa))
+        invalid_3wa_characters = "❓.⁉️.🙃"
+        self.assertFalse(self.geocoder.is_possible_3wa(invalid_3wa_characters))
 
     def test_is_valid_3wa(self):
         # Test if a valid 3-word address is confirmed by the API