diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index 3d9be0d0a..821e1cd3c 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -293,6 +293,7 @@ def initialize_datadir(dirname, n, chain):
         f.write("discover=0\n")
         f.write("listenonion=0\n")
         f.write("printtoconsole=0\n")
+        f.write("upnp=0\n")
         os.makedirs(os.path.join(datadir, 'stderr'), exist_ok=True)
         os.makedirs(os.path.join(datadir, 'stdout'), exist_ok=True)
     return datadir