diff --git a/greg/tests/test_utils.py b/greg/tests/test_utils.py
index 75b5687e76f180d6eb1afae793f318de6b2e4a89..336285ebfc8a91fae60600d7b4da25793ef46d64 100644
--- a/greg/tests/test_utils.py
+++ b/greg/tests/test_utils.py
@@ -33,6 +33,7 @@ def test_not_valid_so_number():
     "string, expected_output",
     [
         ("AZ az ÀÖ ØÞßö øÿ Āſ", False),
+        ("Kari-Mette", False),
         ("aaƂåå", True),
         ("!", True),
         ("÷", True),