diff --git a/plinth/modules/radicale/__init__.py b/plinth/modules/radicale/__init__.py
index 5846f3d1a..92e30e15b 100644
--- a/plinth/modules/radicale/__init__.py
+++ b/plinth/modules/radicale/__init__.py
@@ -217,8 +217,6 @@ def diagnose():
     """Run diagnostics and return the results."""
     results = []
 
-    results.append(action_utils.diagnose_port_listening(5232, 'tcp4'))
-    results.append(action_utils.diagnose_port_listening(5232, 'tcp6'))
     results.extend(
         action_utils.diagnose_url_on_all('https://{host}/radicale',
                                          check_certificate=False))