diff --git a/fastapi/tests/common.py b/fastapi/tests/common.py
index f9c05b67..96658838 100644
--- a/fastapi/tests/common.py
+++ b/fastapi/tests/common.py
@@ -127,6 +127,7 @@ def _create_test_client(
             or self.default_fastapi_authenticated_partner
             or self.env["res.partner"]
         )
+        partner = partner.with_env(env)
         if partner and authenticated_partner_impl in dependencies:
             raise ValueError(
                 "You cannot provide an override for the authenticated_partner_impl "