diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -429,6 +429,7 @@
         f.write("fixedseeds=0\n")
         f.write("listenonion=0\n")
         f.write("printtoconsole=0\n")
+        f.write("upnp=0\n")
         f.write("usecashaddr=1\n")
         # Increase peertimeout to avoid disconnects while using mocktime.
         # peertimeout is measured in mock time, so setting it large enough to