diff --git a/test/pytest/test_dns.py b/test/pytest/test_dns.py
index c0d0c3cd2d5feb0393c94dac62c015b9f572b219..fd202f4878e038d9f3b2ab823fd008cdbb146e4a 100755
--- a/test/pytest/test_dns.py
+++ b/test/pytest/test_dns.py
@@ -40,7 +40,7 @@ def test_dns(host):
         authorative_nameservers.append(ips[0].address)
 
     system_nameservers = dns.resolver.get_default_resolver()
-    external_nameservers = ['1.1.1.1', '8.8.8.8']
+    external_nameservers = ['1.1.1.1', '8.8.8.8', '9.9.9.9']
 
     results = []
     print('\nTesting authorative nameservers:')