Index: firmware/App/HDCommon.h
===================================================================
diff -u -r80e36b1daa7deac4395502176b88d0e10c09577d -r9d883beb6db46527e5784f4a39ce75bfd5041acb
--- firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 80e36b1daa7deac4395502176b88d0e10c09577d)
+++ firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 9d883beb6db46527e5784f4a39ce75bfd5041acb)
@@ -37,7 +37,7 @@
 //    #define RUN_WITHOUT_DG                  1           // Run HD w/o DG
 //    #define SIMULATE_UI                     1           // Build w/o requirement that UI be there
 //    #define TASK_TIMING_OUTPUT_ENABLED      1           // Re-purposes alarm lamp pins for task timing
-    #define DISABLE_ALARM_AUDIO             1           // Disable alarm audio
+//    #define DISABLE_ALARM_AUDIO             1           // Disable alarm audio
 //    #define SKIP_POST                       1           // Skip POST tests - all pass
 //    #define DONT_SKIP_NV_POST               1           // Do not skip NV Data POST
     #define DISABLE_AIR_TRAP_LEVELING_ALARM 1           // Disable air trap level control alarms
@@ -55,7 +55,7 @@
 //    #define DISABLE_PRESSURE_CHECKS         1           // Do not error on HD pressure checks
 //    #define DISABLE_UF_ALARMS               1           // Do not error on HD ultrafiltration checks
 //    #define DISABLE_VALVE_ALARMS            1           // Do not error on HD valve position
-//    #define DISABLE_CAL_CHECK               1           // Disable calibration checks
+    #define DISABLE_CAL_CHECK               1           // Disable calibration checks
 //    #define RUN_PUMPS_OPEN_LOOP             1           // BP and DPi pumps will be run open loop (no flow sensor feedback)
 //    #define RAW_FLOW_SENSOR_DATA            1           // Test build will not filter flow sensor data
 //    #define READ_FPGA_ASYNC_DATA            1           // Test build reads non-priority register page every other time
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r7334590e610cd1543e128ad2dbc0de17e824b619 -r9d883beb6db46527e5784f4a39ce75bfd5041acb
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 7334590e610cd1543e128ad2dbc0de17e824b619)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 9d883beb6db46527e5784f4a39ce75bfd5041acb)
@@ -2514,7 +2514,7 @@
     memcpy( payloadPtr, &testID, sizeof( U32) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
-    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_REQUIRED );
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_NOT_REQUIRED );
 
     return result;
 
@@ -2543,7 +2543,7 @@
     memcpy( payloadPtr, &passed, sizeof( BOOL ) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
-    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_REQUIRED );
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_BROADCAST, ACK_NOT_REQUIRED );
 
     return result;
 }