diff --git a/tests/test_processing/test_referencevalidator.py b/tests/test_processing/test_referencevalidator.py
index 5c541959..7f813799 100644
--- a/tests/test_processing/test_referencevalidator.py
+++ b/tests/test_processing/test_referencevalidator.py
@@ -1062,7 +1062,7 @@ def test_08_normalize_types(self):
             "uriorcurie": [
                 ("X:1", [], [], "X:1"),
                 ("http://example.org", [], [], "http://example.org"),
-                ("", [], [ConstraintType.TypeConstraint], ""),
+                ("", [], [], ""),
                 ("a b", [], [ConstraintType.TypeConstraint], "a b"),
                 (None, [], [], None),
             ],