@@ -210,10 +210,11 @@
   -repl                   : start a repl (useful for extending megatest)
   -load file.scm          : load and run file.scm
   -mark-incompletes       : find and mark incomplete tests
   -ping run-id|host:port  : ping server, exit with 0 if found
   -debug N|N,M,O...       : enable debug 0-N or N and M and O ...
+  -debug-noprop N|M,M,O...: enable debug but do not propagate to subprocesses via MT_DEBUG
   -config fname           : override the megatest.config file with fname
   -append-config fname    : append fname to the megatest.config file
 
 Utilities
   -env2file fname         : write the environment to fname.csh and fname.sh
@@ -345,10 +346,11 @@
 			"-include"
 			"-exclude-rx"
 			"-exclude-rx-from"
 			
 			"-debug" ;; for *verbosity* > 2
+			"-debug-noprop"
 			"-create-test"
 			"-override-timeout"
 			"-test-files"  ;; -test-paths is for listing all
 			"-load"        ;; load and exectute a scheme file
 			"-section"