Index: Lib/test/regrtest.py
===================================================================
--- Lib/test/regrtest.py	(revision 76850)
+++ Lib/test/regrtest.py	(working copy)
@@ -354,6 +354,8 @@
         usage(2, "-T and -j don't go together!")
     if use_mp and findleaks:
         usage(2, "-l and -j don't go together!")
+    if use_mp and max(sys.flags):
+        print "Warning: flags and environment variables are ignored with -j option"
 
     good = []
     bad = []