Index: unittests/tst_messaging.cpp
===================================================================
diff -u -rbf645acccabb7b5a84801620c4f7fa0b0e6878e0 -r0e528e5f706308c7b0e8f22a4d9dbb5b5715db7c
--- unittests/tst_messaging.cpp	(.../tst_messaging.cpp)	(revision bf645acccabb7b5a84801620c4f7fa0b0e6878e0)
+++ unittests/tst_messaging.cpp	(.../tst_messaging.cpp)	(revision 0e528e5f706308c7b0e8f22a4d9dbb5b5715db7c)
@@ -781,13 +781,27 @@
 }
 
 /*!
- * \brief   tst_messaging::tst_MessageInterpreter_interpretMessage_AdjustUltrafiltrationConfirmReq
- * \details Tests MessageInterpreter interpretMessage to handle AdjustUltrafiltrationConfirmReq message type
+ * \brief   tst_messaging::tst_MessageInterpreter_interpretMessage_AdjustSalineReq
+ * \details Tests MessageInterpreter interpretMessage to handle ID_AdjustSalineReq message type
  *          if data is empty (count==0)
  */
-void tst_messaging::tst_MessageInterpreter_interpretMessage_canbusFaultCountData()
+void tst_messaging::tst_MessageInterpreter_interpretMessage_AdjustSalineReq()
 {
     Can::MessageInterpreter iMsg;
+    QByteArray payload;
+    // if the payload is empty the len is not valid and should return false and empty payload
+    QVERIFY( ! iMsg.interpretMessage(Gui::GuiActionType::ID_AdjustSalineReq, {}, payload));
+    QVERIFY(payload.isEmpty());
+}
+
+/*!
+ * \brief   tst_messaging::tst_MessageInterpreter_interpretMessage_CANBusFaultCount
+ * \details Tests MessageInterpreter interpretMessage to handle ID_CANBusFaultCount message type
+ *          if data is empty (count==0)
+ */
+void tst_messaging::tst_MessageInterpreter_interpretMessage_CANBusFaultCount()
+{
+    Can::MessageInterpreter iMsg;
     Can::Message msg;
     msg.actionId = Gui::GuiActionType::ID_CANBusFaultCount;
     msg.data = {};