diff --git a/tests/model.py b/tests/model.py
index 28bf5a2..4fd6f9d 100644
--- a/tests/model.py
+++ b/tests/model.py
@@ -2,7 +2,7 @@
 # This file is under GNU Affero General Public License 3.0
 # see LICENSE.txt
 
-# from . import utils
+from . import utils
 
 import pytest
 
@@ -45,8 +45,13 @@ identities = \
         }
     }
 
-# An Identity class that is read-only (const)
 class Identity:
+    """
+    An Identity class that is:
+    - can represent pEp.Identity
+    - is read-only (const)
+    """
+
     __name = ""
     __user_id = ""
     __addr = ""
diff --git a/tests/utils.py b/tests/utils.py
index 931ead0..d65fc2a 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -2,7 +2,7 @@
 # This file is under GNU Affero General Public License 3.0
 # see LICENSE.txt
 
-# from . import constants
+from . import constants
 
 import pathlib