diff --git a/geoportal/tests/functional/__init__.py b/geoportal/tests/functional/__init__.py
index 73cdd7eb58..855e0dbf1e 100644
--- a/geoportal/tests/functional/__init__.py
+++ b/geoportal/tests/functional/__init__.py
@@ -112,7 +112,10 @@ def setup_db() -> None:
     from c2cgeoportal_commons.models.main import Role
 
     with DBSession() as session:
-        session.add_all([Role(name) for name in ("anonymous", "registered", "intranet")])
+        for role_name in ("anonymous", "registered", "intranet"):
+            role = session.query(Role).filter(Role.name == role_name).one_or_none()
+            if role is None:
+                session.add(Role(name=role_name))
 
         transaction.commit()