On Py3k, -tt and -3 are no-op and unsupported respectively.

diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 92d1597c62ed13e4ac372480a593ed226eb2a881..83c9928cd35249b1df9022d8261211826f1de791 100755 (executable)
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -3,7 +3,7 @@
 """
 Usage:
 
-python -m test.regrtest [options] [test_name1 [test_name2 ...]]
+python -m test [options] [test_name1 [test_name2 ...]]
 python path/to/Lib/test/regrtest.py [options] [test_name1 [test_name2 ...]]
 
 
@@ -14,7 +14,7 @@ them in alphabetical order (but see -M and -u, below, for exceptions).
 For more rigorous testing, it is useful to use the following
 command line:
 
-python -E -tt -Wd -3 -m test.regrtest [options] [test_name1 ...]
+python -E -Wd -m test [options] [test_name1 ...]
 
 
 Options: