diff --git a/tempest/api/volume/test_volume_transfers.py b/tempest/api/volume/test_volume_transfers.py
index cf4e052..f4b2d4c 100644
--- a/tempest/api/volume/test_volume_transfers.py
+++ b/tempest/api/volume/test_volume_transfers.py
@@ -49,7 +49,7 @@
                                          interface=cls._interface)
         else:
             cls.os_alt = clients.AltManager()
-            alt_tenant_name = cls.os_alt.tenant_name
+            alt_tenant_name = cls.os_alt.credentials['tenant_name']
             identity_client = cls._get_identity_admin_client()
             _, tenants = identity_client.list_tenants()
             cls.alt_tenant_id = [tnt['id'] for tnt in tenants