diff --git a/bilean/tests/drivers/test_driver.py b/bilean/tests/drivers/test_driver.py
index 0b92dad..e1760f6 100644
--- a/bilean/tests/drivers/test_driver.py
+++ b/bilean/tests/drivers/test_driver.py
@@ -28,8 +28,7 @@ class TestBileanDriver(base.BileanTestCase):
         env.register_driver('cloud_backend_1', plugin1)
 
         # Using default cloud backend defined in configure file
-        cfg.CONF.set_override('cloud_backend', 'cloud_backend_1',
-                              enforce_type=True)
+        cfg.CONF.set_override('cloud_backend', 'cloud_backend_1')
         bd = driver_base.BileanDriver()
         self.assertEqual('Compute1', bd.compute)
         self.assertEqual('Network1', bd.network)