diff --git a/services/util/SerialCommunicationLoopback.cpp b/services/util/SerialCommunicationLoopback.cpp
index 644a8d15c..c0e166e90 100644
--- a/services/util/SerialCommunicationLoopback.cpp
+++ b/services/util/SerialCommunicationLoopback.cpp
@@ -1,13 +1,29 @@
 #include "services/util/SerialCommunicationLoopback.hpp"
+#include "hal/interfaces/SerialCommunication.hpp"
 #include "infra/event/EventDispatcher.hpp"
 
 namespace services
 {
-    SerialCommunicationLoopbackPeer::SerialCommunicationLoopbackPeer(SerialCommunicationLoopbackPeer& other)
-        : other{ other }
+    SerialCommunicationLoopback::SerialCommunicationLoopback()
+        : server(&client)
+        , client(&server)
+    {}
+
+    hal::SerialCommunication& SerialCommunicationLoopback::Server()
+    {
+        return server;
+    }
+
+    hal::SerialCommunication& SerialCommunicationLoopback::Client()
+    {
+        return client;
+    }
+
+    SerialCommunicationLoopback::SerialCommunicationLoopbackPeer::SerialCommunicationLoopbackPeer(SerialCommunicationLoopbackPeer* other)
+        : other{ *other }
     {}
 
-    void SerialCommunicationLoopbackPeer::SendData(infra::ConstByteRange data, infra::Function<void()> actionOnCompletion)
+    void SerialCommunicationLoopback::SerialCommunicationLoopbackPeer::SendData(infra::ConstByteRange data, infra::Function<void()> actionOnCompletion)
     {
         this->data = data;
         this->actionOnCompletion = actionOnCompletion;
@@ -19,23 +35,8 @@ namespace services
             });
     }
 
-    void SerialCommunicationLoopbackPeer::ReceiveData(infra::Function<void(infra::ConstByteRange data)> dataReceived)
+    void SerialCommunicationLoopback::SerialCommunicationLoopbackPeer::ReceiveData(infra::Function<void(infra::ConstByteRange data)> dataReceived)
     {
         this->dataReceived = dataReceived;
     }
-
-    SerialCommunicationLoopback::SerialCommunicationLoopback()
-        : server(client)
-        , client(server)
-    {}
-
-    SerialCommunicationLoopbackPeer& SerialCommunicationLoopback::Server()
-    {
-        return server;
-    }
-
-    SerialCommunicationLoopbackPeer& SerialCommunicationLoopback::Client()
-    {
-        return client;
-    }
 }
diff --git a/services/util/SerialCommunicationLoopback.hpp b/services/util/SerialCommunicationLoopback.hpp
index f7f39db35..5b63250b2 100644
--- a/services/util/SerialCommunicationLoopback.hpp
+++ b/services/util/SerialCommunicationLoopback.hpp
@@ -5,30 +5,34 @@
 
 namespace services
 {
-    class SerialCommunicationLoopbackPeer
-        : public hal::SerialCommunication
-    {
-    public:
-        explicit SerialCommunicationLoopbackPeer(SerialCommunicationLoopbackPeer& other);
-
-        void SendData(infra::ConstByteRange data, infra::Function<void()> actionOnCompletion) override;
-        void ReceiveData(infra::Function<void(infra::ConstByteRange data)> dataReceived) override;
-
-    private:
-        SerialCommunicationLoopbackPeer& other;
-
-        infra::ConstByteRange data;
-        infra::Function<void()> actionOnCompletion;
-        infra::Function<void(infra::ConstByteRange data)> dataReceived;
-    };
 
     class SerialCommunicationLoopback
     {
     public:
         SerialCommunicationLoopback();
 
-        SerialCommunicationLoopbackPeer& Server();
-        SerialCommunicationLoopbackPeer& Client();
+        hal::SerialCommunication& Server();
+        hal::SerialCommunication& Client();
+
+    private:
+        class SerialCommunicationLoopbackPeer
+            : public hal::SerialCommunication
+        {
+        public:
+            // pointer instead of reference to avoid defining a copy constructor
+            // pass by reference generates a warning with clang and -Wunitialized
+            explicit SerialCommunicationLoopbackPeer(SerialCommunicationLoopbackPeer* other);
+
+            void SendData(infra::ConstByteRange data, infra::Function<void()> actionOnCompletion) override;
+            void ReceiveData(infra::Function<void(infra::ConstByteRange data)> dataReceived) override;
+
+        private:
+            SerialCommunicationLoopbackPeer& other;
+
+            infra::ConstByteRange data;
+            infra::Function<void()> actionOnCompletion;
+            infra::Function<void(infra::ConstByteRange data)> dataReceived;
+        };
 
     private:
         SerialCommunicationLoopbackPeer server;
diff --git a/services/util/test/TestSerialCommunicationLoopback.cpp b/services/util/test/TestSerialCommunicationLoopback.cpp
index cf388e1de..748bf5db8 100644
--- a/services/util/test/TestSerialCommunicationLoopback.cpp
+++ b/services/util/test/TestSerialCommunicationLoopback.cpp
@@ -1,3 +1,4 @@
+#include "hal/interfaces/SerialCommunication.hpp"
 #include "infra/event/test_helper/EventDispatcherFixture.hpp"
 #include "infra/util/ByteRange.hpp"
 #include "infra/util/Function.hpp"
@@ -12,8 +13,8 @@ class SerialCommunicationLoopbackTest
 {
 public:
     services::SerialCommunicationLoopback SerialCommunicationLoopback;
-    services::SerialCommunicationLoopbackPeer& server{ SerialCommunicationLoopback.Server() };
-    services::SerialCommunicationLoopbackPeer& client{ SerialCommunicationLoopback.Client() };
+    hal::SerialCommunication& server{ SerialCommunicationLoopback.Server() };
+    hal::SerialCommunication& client{ SerialCommunicationLoopback.Client() };
 };
 
 TEST_F(SerialCommunicationLoopbackTest, SendFromServerReceiveByClient)