diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index c4d897a59..20b458273 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -230,11 +230,7 @@ class Meta:
         verbose_name_plural = _("users")
 
     def __str__(self):
-        return (
-            str(self.profile_contact)
-            if self.profile_contact
-            else self.email or str(self.sub)
-        )
+        return self.name if self.name else self.email or f"User {self.sub}"
 
     def save(self, *args, **kwargs):
         """
diff --git a/src/backend/core/tests/test_models_team_accesses.py b/src/backend/core/tests/test_models_team_accesses.py
index 8d9bc891f..c628016cd 100644
--- a/src/backend/core/tests/test_models_team_accesses.py
+++ b/src/backend/core/tests/test_models_team_accesses.py
@@ -20,16 +20,13 @@ def test_models_team_accesses_str():
     """
     The str representation should include user name, team full name and role.
     """
-    contact = factories.ContactFactory(full_name="David Bowman")
-    user = contact.owner
-    user.profile_contact = contact
-    user.save()
+    user = factories.UserFactory()
     access = factories.TeamAccessFactory(
         role="member",
         user=user,
         team__name="admins",
     )
-    assert str(access) == "David Bowman is member in team admins"
+    assert str(access) == f"{user} is {access.role} in team {access.team}"
 
 
 def test_models_team_accesses_unique():
diff --git a/src/backend/core/tests/test_models_users.py b/src/backend/core/tests/test_models_users.py
index bd65988ab..87b7f598c 100644
--- a/src/backend/core/tests/test_models_users.py
+++ b/src/backend/core/tests/test_models_users.py
@@ -14,13 +14,18 @@
 
 
 def test_models_users_str():
-    """The str representation should be the full name."""
+    """
+    user str representation should return main name and main email when main identity exists.
+    Otherwise, it should return the admin_email or, as a last resort, uuid.
+    """
     user = factories.UserFactory()
-    contact = factories.ContactFactory(full_name="david bowman", owner=user)
-    user.profile_contact = contact
-    user.save()
+    assert str(user) == user.name
+
+    no_name_user = factories.UserFactory(name=None)
+    assert str(no_name_user) == no_name_user.email
 
-    assert str(user) == "david bowman"
+    no_name_no_email_user = factories.UserFactory(name=None, email=None)
+    assert str(no_name_no_email_user) == f"User {no_name_no_email_user.sub}"
 
 
 def test_models_users_id_unique():