No group does in fact return None

tests/userinfo.py

@@ -459,8 +459,8 @@ def test_primary_group_primary_and_fallback_configured(userinfo):
     "data,group",
     [
         (settings.INPUT_UNITY, "h-df-de_hdf"),
-        #  (settings.INPUT_EGI, None), ## I think it should return None
-        (settings.INPUT_EGI, "nogroup"),
+        (settings.INPUT_EGI, None),
+        #  (settings.INPUT_EGI, "nogroup"),
         (settings.INPUT_DEEP_IAM, "kit-cloud"),
         (settings.INPUT_INDIGO_IAM, "developers"),
         (settings.INPUT_KIT, "kit-edu_bw_grid"),