diff --git a/test/functional/p2p-segwit.py b/test/functional/p2p-segwit.py
index 9bb72c819..9105f0ee0 100755
--- a/test/functional/p2p-segwit.py
+++ b/test/functional/p2p-segwit.py
@@ -33,8 +33,8 @@ def get_virtual_size(witness_block):
     return vsize
 
 class TestNode(NodeConnCB):
-    def set_test_params(self):
-        self.num_nodes = 3
+    def __init__(self):
+        super().__init__()
         self.getdataset = set()
 
     def on_getdata(self, conn, message):