diff --git a/tests/config/test_configtypes.py b/tests/config/test_configtypes.py
index 0461a67c3..22874f12b 100644
--- a/tests/config/test_configtypes.py
+++ b/tests/config/test_configtypes.py
@@ -1580,6 +1580,7 @@ class TestUrlList:
     @pytest.mark.parametrize('val', [
         '',
         'foo,,bar',
+        '+',  # invalid URL with QUrl.fromUserInput
     ])
     def test_validate_invalid(self, klass, val):
         with pytest.raises(configexc.ValidationError):