diff --git a/neutron/tests/unit/ml2/drivers/test_arista_mechanism_driver.py b/neutron/tests/unit/ml2/drivers/test_arista_mechanism_driver.py
index 431dc65106..5397f77b88 100644
--- a/neutron/tests/unit/ml2/drivers/test_arista_mechanism_driver.py
+++ b/neutron/tests/unit/ml2/drivers/test_arista_mechanism_driver.py
@@ -45,6 +45,7 @@ class AristaProvisionedVlansStorageTestCase(base.BaseTestCase):
     def setUp(self):
         super(AristaProvisionedVlansStorageTestCase, self).setUp()
         ndb.configure_db()
+        self.addCleanup(ndb.clear_db)
 
     def test_tenant_is_remembered(self):
         tenant_id = 'test'