diff --git a/contrib/pyln-testing/pyln/testing/utils.py b/contrib/pyln-testing/pyln/testing/utils.py
index 8a2f3357df8e..b4f694491576 100644
--- a/contrib/pyln-testing/pyln/testing/utils.py
+++ b/contrib/pyln-testing/pyln/testing/utils.py
@@ -1484,6 +1484,7 @@ def join_nodes(self, nodes, fundchannel=True, fundamount=FUNDAMOUNT, wait_for_an
         for n in nodes:
             for end in (nodes[0], nodes[-1]):
                 wait_for(lambda: end.rpc.listnodes(n.info['id'])['nodes'] != [])
+                print("***listnodes = {}".format(end.rpc.listnodes(n.info['id'])['nodes']))
                 wait_for(lambda: 'alias' in only_one(end.rpc.listnodes(n.info['id'])['nodes']))
 
     def line_graph(self, num_nodes, fundchannel=True, fundamount=FUNDAMOUNT, wait_for_announce=False, opts=None, announce_channels=True):