diff --git a/openlcb/localnodeprocessor.py b/openlcb/localnodeprocessor.py
index 93f84fb..8c2dcd1 100644
--- a/openlcb/localnodeprocessor.py
+++ b/openlcb/localnodeprocessor.py
@@ -65,7 +65,7 @@ def process(self, message, givenNode=None):
                              MTI.Optional_Interaction_Rejected):
             self.errorMessageReceived(message, node)
         else:
-            self.unrecognizedMTI(message, node)
+            self._unrecognizedMTI(message, node)
         return False
 
     # private method
@@ -123,11 +123,10 @@ def identifyEventsAddressed(self, message, node):
         '''
         return
 
-    def unrecognizedMTI(self, message, node):
+    def _unrecognizedMTI(self, message, node):
         '''Handle a message with an unrecognized MTI
         by returning OptionalInteractionRejected
         '''
-        # FIXME: should be private method. Add _ to start of method name.
 
         # special case of unknown MTI from lower level
         unknownAddressed = False
diff --git a/openlcb/memoryservice.py b/openlcb/memoryservice.py
index 8675355..bd3ed43 100644
--- a/openlcb/memoryservice.py
+++ b/openlcb/memoryservice.py
@@ -296,9 +296,9 @@ def arrayToUInt64(self, data):
                 64-bit int
 
         Returns:
-            int: The converted data as a number.
+            int: The converted data as a number (Python determines
+                actual in-memory size based on the value).
         """
-        # FIXME: Python resizes ints automatically based on value.
         result = 0
         for index in range(0, len(data)):
             result = result << 8
diff --git a/openlcb/remotenodeprocessor.py b/openlcb/remotenodeprocessor.py
index 3170e59..81c66cf 100644
--- a/openlcb/remotenodeprocessor.py
+++ b/openlcb/remotenodeprocessor.py
@@ -42,34 +42,33 @@ def process(self, message, node) :
             node.state = Node.State.Initialized  # in case we came late to the party, must be in Initialized state  # noqa: E501
 
         # specific message handling
-        match message.mti :
-            case MTI.Initialization_Complete | MTI.Initialization_Complete_Simple :  # noqa: E501
-                self.initializationComplete(message, node)
-                return True
-            case MTI.Protocol_Support_Reply :
-                self.protocolSupportReply(message, node)
-                return True
-            case MTI.Link_Layer_Up :
-                self.linkUpMessage(message, node)
-            case MTI.Link_Layer_Down :
-                self.linkDownMessage(message, node)
-            case MTI.Simple_Node_Ident_Info_Request :
-                self.simpleNodeIdentInfoRequest(message, node)
-            case MTI.Simple_Node_Ident_Info_Reply :
-                self.simpleNodeIdentInfoReply(message, node)
-                return True
-            case MTI.Producer_Identified_Active | MTI.Producer_Identified_Inactive | MTI.Producer_Identified_Unknown | MTI.Producer_Consumer_Event_Report :  # noqa: E501
-                self.producedEventIndicated(message, node)
-                return True
-            case MTI.Consumer_Identified_Active | MTI.Consumer_Identified_Inactive | MTI.Consumer_Identified_Unknown :  # noqa: E501
-                self.consumedEventIndicated(message, node)
-                return True
-            case MTI.New_Node_Seen :
-                self.newNodeSeen(message, node)
-                return True
-            case _ :
-                # we ignore others
-                return False
+        if message.mti in (MTI.Initialization_Complete, MTI.Initialization_Complete_Simple) :  # noqa: E501
+            self.initializationComplete(message, node)
+            return True
+        elif message.mti == MTI.Protocol_Support_Reply :
+            self.protocolSupportReply(message, node)
+            return True
+        elif message.mti == MTI.Link_Layer_Up :
+            self.linkUpMessage(message, node)
+        elif message.mti == MTI.Link_Layer_Down :
+            self.linkDownMessage(message, node)
+        elif message.mti == MTI.Simple_Node_Ident_Info_Request :
+            self.simpleNodeIdentInfoRequest(message, node)
+        elif message.mti == MTI.Simple_Node_Ident_Info_Reply :
+            self.simpleNodeIdentInfoReply(message, node)
+            return True
+        elif message.mti in (MTI.Producer_Identified_Active, MTI.Producer_Identified_Inactive, MTI.Producer_Identified_Unknown, MTI.Producer_Consumer_Event_Report) :  # noqa: E501
+            self.producedEventIndicated(message, node)
+            return True
+        elif message.mti in (MTI.Consumer_Identified_Active, MTI.Consumer_Identified_Inactive, MTI.Consumer_Identified_Unknown) :  # noqa: E501
+            self.consumedEventIndicated(message, node)
+            return True
+        elif message.mti == MTI.New_Node_Seen :
+            self.newNodeSeen(message, node)
+            return True
+        else :
+            # we ignore others
+            return False
         return False
 
     def initializationComplete(self, message, node) :
diff --git a/tests/test_physicallayer.py b/tests/test_physicallayer.py
index 89d1a03..a9c234b 100644
--- a/tests/test_physicallayer.py
+++ b/tests/test_physicallayer.py
@@ -7,7 +7,7 @@
 class TestPhysicalLayerClass(unittest.TestCase):
 
     def testExample(self):
-        # FIXME: finish this
+        # TODO: Test what is possible without hardware.
         pass