diff --git a/EduNetworkBuilder/NetworkBuilder.cs b/EduNetworkBuilder/NetworkBuilder.cs
index 0421bc3..c38f793 100644
--- a/EduNetworkBuilder/NetworkBuilder.cs
+++ b/EduNetworkBuilder/NetworkBuilder.cs
@@ -1036,7 +1036,7 @@ namespace EduNetworkBuilder
                             toDo = !myNetwork.ItemTestIsComplete(ReleasedOn.hostname, NetTestType.DeviceBlowsUpWithPower);
                         if (myNetwork.ItemHasTest(ReleasedOn.hostname, NetTestType.DeviceNICSprays))
                         {
-                            if (ReleasedOn.ForwardsPackets())
+                            if (ReleasedOn.ForwardsPackets() && !myNetwork.ItemTestIsComplete(ReleasedOn.hostname, NetTestType.DeviceNICSprays))
                                 toDo = true;  //with PCs and the like, we replace the individual nic
                         }
                         if (toDo)