The attached patch ignores the following test modules listed in msg266084: Lib/distutils/tests/test_build_scripts.py|68 col 31| ("#!/bin/sh\n" Lib/distutils/tests/test_install_scripts.py|57 col 38| write_script("shell.sh", ("#!/bin/sh\n" reason: The scripts are not meant to be run. Lib/test/test__osx_support.py|46 col 24| f.write("#!/bin/sh\n/bin/echo OK\n") Lib/test/test__osx_support.py|58 col 24| f.write("#!/bin/sh\n/bin/echo ExpectedOutput\n") Lib/test/test__osx_support.py|149 col 28| f.write("#!/bin/sh\n/bin/echo " + c_output) Lib/test/test__osx_support.py|205 col 24| f.write("#!/bin/sh\nexit 255") reason: These tests run only on the darwin platform. Lib/test/test_subprocess.py|1645 col 15| sh = '/bin/sh' Lib/test/test_subprocess.py|1647 col 33| # Test will fail if /bin/sh is a symlink to csh. reason: This test is specific to bash or ksh.