diff --git a/api/ooniapi/probe_services.py b/api/ooniapi/probe_services.py
index 6ef09578..b60e4ca5 100644
--- a/api/ooniapi/probe_services.py
+++ b/api/ooniapi/probe_services.py
@@ -580,7 +580,7 @@ def generate_test_helpers_conf() -> Dict:
         [
             "https://0.th.ooni.org",
             "https://6.th.ooni.org",
-            "https://4.th.ooni.org",
+            "https://5.th.ooni.org",
         ]
     )
     conf["web-connectivity"].append(