diff --git a/nixos/modules/tests/run-introducer.py b/nixos/modules/tests/run-introducer.py
index 40885590500b1c47bfac78c3526dc6c4eac4aeaf..9f032678aecbad939b4c280a272ab20c0c7c41d9 100755
--- a/nixos/modules/tests/run-introducer.py
+++ b/nixos/modules/tests/run-introducer.py
@@ -35,7 +35,7 @@ def main():
 
     retry(
         "waiting for open introducer port",
-        lambda: checkOpen(35151),
+        lambda: checkOpen(int(introducerPort)),
     )