diff --git a/tests/utils.py b/tests/utils.py
index 011c1ca9a..8fe68a6a8 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -676,6 +676,7 @@ class NodeFactory(object):
             'may_fail',
             'may_reconnect',
             'random_hsm',
+            'log_all_io',
         ]
         node_opts = {k: v for k, v in opts.items() if k in node_opt_keys}
         cli_opts = {k: v for k, v in opts.items() if k not in node_opt_keys}