Index: firmware/App/TDCommon.h
===================================================================
diff -u -ra5560a2917aa62bcafd8e6a81041ace723237109 -r079daac611a8eb3a34c0c43392a044a882461d30
--- firmware/App/TDCommon.h	(.../TDCommon.h)	(revision a5560a2917aa62bcafd8e6a81041ace723237109)
+++ firmware/App/TDCommon.h	(.../TDCommon.h)	(revision 079daac611a8eb3a34c0c43392a044a882461d30)
@@ -34,8 +34,9 @@
 //    #define TASK_TIMING_OUTPUT_ENABLED      1           // Re-purposes alarm lamp pins for task timing
 //    #define TEST_AIR_TRAP_ALPHA_TESTING     1           // Alpha unit air trap testing
 //    #define TEST_PINCH_VALVES               1           // Alpha unit pinch valve testing
-//    #define TEST_UI_ONLY                    1           // Alpha test with TD and UI only - no DD
-//    #define TEST_NO_PINCH_VALVES            1           // Alpha test with no pinch valve functionality
+    #define TEST_UI_ONLY                    1           // Alpha test with TD and UI only - no DD
+    #define TEST_NO_PINCH_VALVES            1           // Alpha test with no pinch valve functionality
+    #define TEST_USE_OFF_AS_STOP_BUTTON     1           // Alpha test re-purposing off button as a stop button
 
     #include <stdio.h>
     #include <strings.h>