@@ -857,11 +857,12 @@
                            (runconfig:read (conc *toppath* "/runconfigs.config") target #f))))
 	  (if (and rundir ;; have all needed variabless
 		   (directory-exists? rundir)
 		   (file-write-access? rundir))
 	      (begin
-		(configf:write-alist data cfgf)
+                (if (not (common:in-running-test?))
+                    (configf:write-alist data cfgf))
 		;; force re-read of megatest.config - this resolves circular references between megatest.config
 		(launch:setup force: #t)
 		(launch:cache-config))) ;; we can safely cache megatest.config since we have a valid runconfig
 	  data))))