diff --git a/lib/checks.py b/lib/checks.py
index 040ff152c26b729bcfe6e5af93f922af981cad9b..c7bfc6a41f497c9db27af2ee91b78d41ea8e15bb 100644
--- a/lib/checks.py
+++ b/lib/checks.py
@@ -5,7 +5,7 @@ from collections import Iterable
 
 
 class Host(object):
-    def __init__(self, ipv4, ipv6, name=None):
+    def __init__(self, ipv4='192.0.2.1', ipv6='2001:db8::1', name=None):
         self.ipv4 = ipv4
         self.ipv6 = ipv6
         self.name = name if name is not None else "%s/%s" % (ipv4, ipv6)