diff --git a/canaille/account.py b/canaille/account.py
index b41fc355..c603ec71 100644
--- a/canaille/account.py
+++ b/canaille/account.py
@@ -406,7 +406,7 @@ def profile_create(current_app, form):
     if "groups" in form:
         groups = [Group.get(group_id) for group_id in form["groups"].data]
         for group in groups:
-            group.add_member(user)
+            group.members = group.members + [user]
             group.save()
 
     if form["password1"].data:
@@ -589,7 +589,7 @@ def profile_settings_edit(editor, edited_user):
         else:
             for attribute in form:
                 if attribute.name == "groups" and "groups" in editor.write:
-                    edited_user.set_groups(attribute.data)
+                    edited_user.groups = attribute.data
 
             if (
                 "password1" in request.form
diff --git a/canaille/models.py b/canaille/models.py
index 5eddf92a..201082d6 100644
--- a/canaille/models.py
+++ b/canaille/models.py
@@ -135,16 +135,17 @@ class User(LDAPObject):
             self.load_groups()
         return self._groups
 
-    def set_groups(self, values):
+    @groups.setter
+    def groups(self, values):
         before = self._groups
         after = [v if isinstance(v, Group) else Group.get(id=v) for v in values]
         to_add = set(after) - set(before)
         to_del = set(before) - set(after)
         for group in to_add:
-            group.add_member(self)
+            group.members = group.members + [self]
             group.save()
         for group in to_del:
-            group.remove_member(self)
+            group.members = [member for member in group.members if member != self]
             group.save()
         self._groups = after
 
@@ -211,12 +212,3 @@ class Group(LDAPObject):
             "GROUP_NAME_ATTRIBUTE", Group.DEFAULT_NAME_ATTRIBUTE
         )
         return self[attribute][0]
-
-    def get_members(self):
-        return [member for member in self.members if member]
-
-    def add_member(self, user):
-        self.members = self.members + [user]
-
-    def remove_member(self, user):
-        self.members = [m for m in self.members if m != user]
diff --git a/tests/test_groups.py b/tests/test_groups.py
index ebcce6df..f2d29b84 100644
--- a/tests/test_groups.py
+++ b/tests/test_groups.py
@@ -87,23 +87,23 @@ def test_group_list_search(testclient, logged_admin, foo_group, bar_group):
 
 
 def test_set_groups(app, user, foo_group, bar_group):
-    assert user in foo_group.get_members()
+    assert user in foo_group.members
     assert user.groups[0] == foo_group
 
     user.load_groups()
-    user.set_groups([foo_group, bar_group])
+    user.groups = [foo_group, bar_group]
 
     bar_group = Group.get(bar_group.id)
-    assert user in bar_group.get_members()
+    assert user in bar_group.members
     assert user.groups[1] == bar_group
 
     user.load_groups()
-    user.set_groups([foo_group])
+    user.groups = [foo_group]
 
     foo_group = Group.get(foo_group.id)
     bar_group = Group.get(bar_group.id)
-    assert user in foo_group.get_members()
-    assert user not in bar_group.get_members()
+    assert user in foo_group.members
+    assert user not in bar_group.members
 
 
 def test_set_groups_with_leading_space_in_user_id_attribute(app, foo_group):
@@ -116,15 +116,15 @@ def test_set_groups_with_leading_space_in_user_id_attribute(app, foo_group):
     user.save()
 
     user.load_groups()
-    user.set_groups([foo_group])
+    user.groups = [foo_group]
 
-    assert user in foo_group.get_members()
+    assert user in foo_group.members
 
     user.load_groups()
-    user.set_groups([])
+    user.groups = []
 
     foo_group = Group.get(foo_group.id)
-    assert user.id not in foo_group.get_members()
+    assert user.id not in foo_group.members
 
     user.delete()
 
@@ -151,7 +151,7 @@ def test_moderator_can_create_edit_and_delete_group(
     bar_group = Group.get("bar")
     assert bar_group.display_name == "bar"
     assert bar_group.description == ["yolo"]
-    assert bar_group.get_members() == [
+    assert bar_group.members == [
         logged_moderator
     ]  # Group cannot be empty so creator is added in it
     res.mustcontain("bar")
@@ -168,7 +168,7 @@ def test_moderator_can_create_edit_and_delete_group(
     assert bar_group.display_name == "bar"
     assert bar_group.description == ["yolo2"]
     assert Group.get("bar2") is None
-    members = bar_group.get_members()
+    members = bar_group.members
     for member in members:
         res.mustcontain(member.formatted_name[0])
 
@@ -208,7 +208,7 @@ def test_get_members_filters_non_existent_user(
     foo_group.member = foo_group.member + [non_existent_user]
     foo_group.save()
 
-    foo_group.get_members()
+    foo_group.members
 
     assert foo_group.member == [user, non_existent_user]
 
@@ -237,7 +237,7 @@ def test_user_list_pagination(testclient, logged_admin, foo_group):
 
     users = fake_users(25)
     for user in users:
-        foo_group.add_member(user)
+        foo_group.members = foo_group.members + [user]
     foo_group.save()
 
     res = testclient.get("/groups/foo")
@@ -275,8 +275,7 @@ def test_user_list_bad_pages(testclient, logged_admin, foo_group):
 
 
 def test_user_list_search(testclient, logged_admin, foo_group, user, moderator):
-    foo_group.add_member(logged_admin)
-    foo_group.add_member(moderator)
+    foo_group.members = foo_group.members + [logged_admin, moderator]
     foo_group.save()
 
     res = testclient.get("/groups/foo")