diff --git a/src/tests/client/test-client.py b/src/tests/client/test-client.py
index eadc2d496..3077f21e3 100755
--- a/src/tests/client/test-client.py
+++ b/src/tests/client/test-client.py
@@ -2172,7 +2172,7 @@ class TestNmCloudSetup(TestNmClient):
                 [sys.executable, service_path],
                 stdin=subprocess.PIPE,
                 env=env,
-                pass_fds=(s.fileno(),),
+                pass_fds=(3,),
                 preexec_fn=pass_socket,
             )