diff --git a/tests/daemon/fw/topology-tester.cpp b/tests/daemon/fw/topology-tester.cpp
index a758ee2..a7ff33a 100644
--- a/tests/daemon/fw/topology-tester.cpp
+++ b/tests/daemon/fw/topology-tester.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California,
+ * Copyright (c) 2014-2023,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -125,7 +125,7 @@
   m_clientTransport->connectToForwarder(m_forwarderTransport);
 }
 
-class TopologyBareLink::Observer : public face::InternalTransportBase
+class TopologyBareLink::Observer final : public face::InternalTransportBase
 {
 public:
   explicit