Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r5f1b50a1d9a7bd6ea17bb666e28ccfeafe56432c -rf90c1eef73251d75ce49645eb05deb492a486ff0
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 5f1b50a1d9a7bd6ea17bb666e28ccfeafe56432c)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision f90c1eef73251d75ce49645eb05deb492a486ff0)
@@ -60,6 +60,7 @@
 #include "StateFlushPermeate.h"
 #include "StateInletPressureCheck.h"
 #include "SystemCommDD.h"
+#include "SubstitutionPump.h"
 #include "Temperature.h"
 #include "TestSupport.h"
 #include "TDInterface.h"
@@ -290,6 +291,9 @@
     { MSG_ID_FP_CONDUCTIVITY_SENSOR_VERSION_REQUEST,                                &testHandleConductivitySensorVersionRequest },
     { MSG_ID_DD_TEMPERATURE_SENSOR_FILTERED_TEMP_OVERRIDE_REQUEST,                  &testDDTemperatureSensorFilteredReadingsOverride },
     { MSG_ID_FP_SET_RECOVERY_VALVES_REQUEST,                                        &testIOFPSetValveRecoveryConfig },
+    { MSG_ID_DD_SUBSTITUTION_PUMP_START_STOP_OVERRIDE_REQUEST,                      &testSubstitutionPumpStartStopOverride },
+    { MSG_ID_DD_SUBSTITUTION_PUMP_BROADCAST_OVERRIDE_REQUEST,                       &testSubstitutionPumpDataPublishIntervalOverride },
+    { MSG_ID_DD_SUBSTITUTION_PUMP_TARGET_SPEED_OVERRIDE_REQUEST,                    &testSubstitutionPumpTargetSpeedOverride },
 };
 
 /// Calculation for number of entries in the incoming message function handler look-up table.