#!/usr/bin/env python
import sys
from django.core.management import execute_manager
try:
    import settings # Assumed to be in the same directory.
except ImportError:
    sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n(If the file settings.py does indeed exist, it's causing an ImportError somehow.)\n" % __file__)
    sys.exit(1)

sys.argv.insert(1, 'test')

if len(sys.argv) == 2:
    sys.argv.append('testapp_tests')

if __name__ == "__main__":
    execute_manager(settings)

#!/usr/bin/env python
import os
import sys

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")

    from django.core.management import execute_from_command_line

    sys.argv.insert(1, 'test')

    if len(sys.argv) == 2:
        sys.argv.append('testapp_tests')

    execute_from_command_line(sys.argv)

Update runtests.py to no longer use removed functions.