diff --git a/neutron_lib/tests/unit/api/definitions/test_bgpvpn.py b/neutron_lib/tests/unit/api/definitions/test_bgpvpn.py
index 86ecd76dd..edfc187de 100644
--- a/neutron_lib/tests/unit/api/definitions/test_bgpvpn.py
+++ b/neutron_lib/tests/unit/api/definitions/test_bgpvpn.py
@@ -32,6 +32,7 @@ class BgpvpnDefinitionTestCase(base.DefinitionBaseTestCase):
                   ['4294967296:65535'],
                   ['1.1.1.1:655351'],
                   ['4294967295:65536'],
+                  [''],
                   ]
         for value in values:
             yield value