diff --git a/EduNetworkBuilder/NetTest.cs b/EduNetworkBuilder/NetTest.cs
index 35dd0c3..516c599 100644
--- a/EduNetworkBuilder/NetTest.cs
+++ b/EduNetworkBuilder/NetTest.cs
@@ -440,9 +440,10 @@ namespace EduNetworkBuilder
         /// See if the test has been solved
         /// </summary>
         /// <returns></returns>
-        public bool TestComplete()
+        public bool TestComplete(Network UseThisNet = null)
         {
-            Network theNet = NB.GetNetwork();
+            Network theNet = UseThisNet;
+            if(theNet == null) theNet= NB.GetNetwork();
             NetworkDevice Source = theNet.GetDeviceFromName(sHost);
             NetworkDevice Dest = theNet.GetDeviceFromName(dHost);
             IPAddress gw;