diff --git a/luncho/blueprints/groups.py b/luncho/blueprints/groups.py
index 6065a1c..86d48af 100644
--- a/luncho/blueprints/groups.py
+++ b/luncho/blueprints/groups.py
@@ -454,7 +454,8 @@ def group_add_places(group_id):
 
     not_found = []
     rejected = []
-    LOG.debug('Users in the group: {users}'.format(users=group.users))
+    group_users = [user.username for user in group.users]
+    LOG.debug('Users in the group: {users}'.format(users=group_users))
     for place_id in request.as_json.get('places', []):
         place = Place.query.get(place_id)
         if not place:
@@ -464,7 +465,7 @@ def group_add_places(group_id):
         LOG.debug('Place {place_id} owner: {owner}'.format(
             place_id=place_id,
             owner=place.owner))
-        if place.owner not in group.users:
+        if place.owner not in group_users:
             rejected.append(place_id)
             continue
 
diff --git a/tests/group_tests.py b/tests/group_tests.py
index 72d9554..c301e25 100644
--- a/tests/group_tests.py
+++ b/tests/group_tests.py
@@ -426,7 +426,7 @@ class TestPlacesInGroup(LunchoTests):
             user = self.user
 
         place = Place(name='Place',
-                      owner=self.user)
+                      owner=user)
         server.db.session.add(place)
         server.db.session.commit()
         return place
@@ -470,6 +470,7 @@ class TestPlacesInGroup(LunchoTests):
                                     verified=True)
         group = self._group()           # group belongs to self.user
         place = self._place(new_user)   # place belongs to new_user
+        place_id = place.id
 
         request = {'places': [place.id]}
         group_id = group.id
@@ -477,6 +478,9 @@ class TestPlacesInGroup(LunchoTests):
                        request,
                        token=self.user.token)
         self.assertJsonOk(rv)
+        json = loads(rv.data)
+        self.assertTrue('rejected' in json)
+        self.assertTrue(place_id in json['rejected'])
 
 if __name__ == '__main__':
     unittest.main()