The list of locations where '/bin/sh' is hard coded in the standard library:

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"
Lib/distutils/tests/test_spawn.py|34 col 37| self.write_file(exe, '#!/bin/sh\nexit 1')
Lib/distutils/tests/test_spawn.py|45 col 37| self.write_file(exe, '#!/bin/sh\nexit 0')
Lib/subprocess.py|611 col 24| >>> check_output(["/bin/sh", "-c",
Lib/subprocess.py|1450 col 26| args = ["/bin/sh", "-c"] + args
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")
Lib/test/test_os.py|673 col 42| @unittest.skipUnless(os.path.exists('/bin/sh'), 'requires /bin/sh')
Lib/test/test_os.py|677 col 24| with os.popen("/bin/sh -c 'echo $HELLO'") as popen:
Lib/test/test_os.py|681 col 42| @unittest.skipUnless(os.path.exists('/bin/sh'), 'requires /bin/sh')
Lib/test/test_os.py|684 col 14| "/bin/sh -c 'echo \"line1\nline2\nline3\"'") as popen:
Lib/test/test_subprocess.py|1563 col 31| fobj.write("#!/bin/sh\n")
Lib/test/test_subprocess.py|1611 col 31| fobj.write("#!/bin/sh\n")
Lib/test/test_subprocess.py|1629 col 15| sh = '/bin/sh'