diff --git a/tests/test_cln_rs.py b/tests/test_cln_rs.py
index 80845f9ef..7d1793476 100644
--- a/tests/test_cln_rs.py
+++ b/tests/test_cln_rs.py
@@ -1,7 +1,7 @@
 from fixtures import *  # noqa: F401,F403
 from pathlib import Path
 from pyln import grpc as clnpb
-from pyln.testing.utils import env, TEST_NETWORK, wait_for, sync_blockheight, TIMEOUT
+from pyln.testing.utils import env, TEST_NETWORK, wait_for, sync_blockheight, TIMEOUT, reserve_unused_port
 from utils import first_scid
 import grpc
 import pytest
@@ -403,7 +403,7 @@ def test_rust_plugin_subscribe_wildcard(node_factory):
 
 
 def test_grpc_block_added_notifications(node_factory, bitcoind):
-    grpc_port = node_factory.reserve_unused_port()
+    grpc_port = reserve_unused_port()
 
     l1 = node_factory.get_node(options={"grpc-port": str(grpc_port)})
 
@@ -421,7 +421,7 @@ def test_grpc_block_added_notifications(node_factory, bitcoind):
 
 
 def test_grpc_connect_notification(node_factory):
-    grpc_port = node_factory.reserve_unused_port()
+    grpc_port = reserve_unused_port()
 
     l1 = node_factory.get_node(options={"grpc-port": str(grpc_port)})
     l2 = node_factory.get_node()
@@ -436,7 +436,7 @@ def test_grpc_connect_notification(node_factory):
 
 
 def test_grpc_custommsg_notification(node_factory):
-    grpc_port = node_factory.reserve_unused_port()
+    grpc_port = reserve_unused_port()
 
     l1 = node_factory.get_node(options={"grpc-port": str(grpc_port)})
     l2 = node_factory.get_node()