diff --git a/server/corvus/service/role_service.py b/server/corvus/service/role_service.py
index 5b2c740..7a66d87 100644
--- a/server/corvus/service/role_service.py
+++ b/server/corvus/service/role_service.py
@@ -15,7 +15,8 @@ class Role(Enum):
     ANONYMOUS = 'ANONYMOUS'
     NONE = 'NONE'
 
-    def __str__(self):
+    def __str__(self) -> str:
+        """Return the value of the enum."""
         return self.value
 
 
@@ -104,8 +105,9 @@ class RoleTree(defaultdict):
             roles.extend(role_tree.get_children_roles())
         return set(roles)
 
-    def __str__(self):
-        return str(self.data)
+    def __str__(self) -> str:
+        """Represent the tree with the value of the node."""
+        return 'RoleTree.%s(%d)' % (self.data, self.power)
 
 
 ROLES = RoleTree(None, Role.OWNER, 0)
diff --git a/server/manage.py b/server/manage.py
index 28c8db3..19a282c 100644
--- a/server/manage.py
+++ b/server/manage.py
@@ -57,7 +57,8 @@ def delete_user(name: str):
               envvar='ROLE',
               help='Role to assign to the user. '
                    + 'default=[USER] acceptable values = ['
-                   + ','.join(sorted(set(map(lambda rt: str(rt), ROLE_LIST))))
+                   + ','.join(
+                        sorted(set(map(lambda rt: str(rt.data), ROLE_LIST))))
                    + ']')
 def register_user(
         name: str,
diff --git a/server/tests/service/test_role_service.py b/server/tests/service/test_role_service.py
index 6982dcf..1d49c05 100644
--- a/server/tests/service/test_role_service.py
+++ b/server/tests/service/test_role_service.py
@@ -3,16 +3,18 @@ from corvus.service.role_service import ROLES, Role
 
 def test_role_tree_find_roles_in_hierarchy():
     roles = ROLES.find_roles_in_hierarchy(Role.USER)
-    assert len(roles) == 4
+    assert len(roles) == 5
     assert Role.USER in roles
     assert Role.MODERATOR in roles
     assert Role.AUDITOR in roles
     assert Role.ADMIN in roles
+    assert Role.OWNER in roles
 
     roles = ROLES.find_roles_in_hierarchy(Role.AUDITOR)
-    assert len(roles) == 2
+    assert len(roles) == 3
     assert Role.AUDITOR in roles
     assert Role.ADMIN in roles
+    assert Role.OWNER in roles
 
 
 def test_role_tree_find_children_roles():