diff --git a/vmware_nsx_tempest/tests/api/test_network_tags.py b/vmware_nsx_tempest/tests/api/test_network_tags.py
index 705b49f..d9da938 100644
--- a/vmware_nsx_tempest/tests/api/test_network_tags.py
+++ b/vmware_nsx_tempest/tests/api/test_network_tags.py
@@ -138,7 +138,7 @@ class NetworkTagAddTest(BaseTagsTest):
     @decorators.attr(type='negative')
     def test_add_tag_empty_one(self):
         network_id = self.net.get('id')
-        self.assertRaises(exceptions.NotFound,
+        self.assertRaises(exceptions.BadRequest,
                           self.network_add_tag,
                           network_id, '')