old_contents: import os
  
  os.environ['DJANGO_SETTINGS_MODULE'] = 'tests.settings'
  
  from django.core import management
  management.call_command('test', 'tests')
  
new_contents: import os
  import sys
  
  os.environ['DJANGO_SETTINGS_MODULE'] = 'tests.settings'
  
  from django.core import management
  
  apps = sys.argv[1:]
  
  if not apps:
      apps = [
          'tests',
      ]
  
  management.call_command('test', *apps)
  
subject: Improve test_suite to take args from the command line