diff --git a/test/mitmproxy/tutils.py b/test/mitmproxy/tutils.py
index edcdf3e21..99e832479 100644
--- a/test/mitmproxy/tutils.py
+++ b/test/mitmproxy/tutils.py
@@ -93,6 +93,7 @@ def tserver_conn():
     c = ServerConnection.from_state(dict(
         address=dict(address=("address", 22), use_ipv6=True),
         source_address=dict(address=("address", 22), use_ipv6=True),
+        sock_address=None,
         cert=None,
         timestamp_start=1,
         timestamp_tcp_setup=2,