Index: unittests/tst_messaging.cpp
===================================================================
diff -u -ra9dcbee03acab972b43f696b2f3dbdf99f1eeb97 -r7d3062c841b788ced31d939dec990afe0de1442d
--- unittests/tst_messaging.cpp	(.../tst_messaging.cpp)	(revision a9dcbee03acab972b43f696b2f3dbdf99f1eeb97)
+++ unittests/tst_messaging.cpp	(.../tst_messaging.cpp)	(revision 7d3062c841b788ced31d939dec990afe0de1442d)
@@ -52,6 +52,19 @@
 }
 
 /*!
+ * \brief   tst_messaging::tst_MessageInterpreter_isPayloadLenValid
+ * \details Tests MessageInterpreter isPayloadLenValid method
+ */
+void tst_messaging::tst_MessageInterpreter_isPayloadLenValid_undefined()
+{
+    Can::MessageInterpreter iMsg;
+    Can::Message msg;
+    msg.actionId = static_cast<Gui::GuiActionType>(-1);
+    msg.data = {};
+    QVERIFY( ! iMsg.isPayloadLenValid(msg, msg.actionId));
+}
+
+/*!
  * \brief   tst_messaging::tst_MessageInterpreter_getPowerOffData_isType
  * \details Tests MessageInterpreter getPowerOffData method Message Type checking
  */
@@ -443,7 +456,7 @@
 {
     Can::MessageInterpreter iMsg;
     Can::Message msg;
-    msg.actionId = Gui::GuiActionType::AcknowGeneric;
+    msg.actionId = Gui::GuiActionType::AdjustUltrafiltrationStateReq;
     msg.data = {};
     QVariantList list;
     QVERIFY( ! iMsg.adjustUltrafiltrationStateData(msg, list));
@@ -630,6 +643,18 @@
     QVERIFY(payload.isEmpty());
 }
 
+void tst_messaging::tst_MessageInterpreter_interpretMessage_DG_Unhandled()
+{
+    Can::MessageInterpreter iMsg;
+    QByteArray payload;
+    Can::Message msg;
+    msg.actionId = static_cast<Gui::GuiActionType>(-1);
+    msg.data = {};
+    QVariantList list;
+    QVERIFY( ! iMsg.interpretMessage_DG(msg, list));
+    QVERIFY(list.isEmpty());
+}
+
 /*!
  * \brief   tst_messaging::tst_MessageInterpreter_interpretMessage_AdjustBloodDialysateReq
  * \details Tests MessageInterpreter interpretMessage to handle AdjustBloodDialysateReq message type