diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 3e1a5bc..2212af5 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -211,7 +211,7 @@
 
     test_support.record_original_stdout(sys.stdout)
     try:
-        opts, args = getopt.getopt(sys.argv[1:], 'hvgqxsSrf:lu:t:TD:NLR:wM:',
+        opts, args = getopt.getopt(sys.argv[1:], 'hvgqxsSrf:lu:t:TD:NLR:wM:n',
                                    ['help', 'verbose', 'quiet', 'exclude',
                                     'single', 'slow', 'random', 'fromfile',
                                     'findleaks', 'use=', 'threshold=', 'trace',