old_contents: # -*- coding: utf-8 -*-
  
  import os
  import sys
  
  from salt.cli.api import SaltAPI
  from tests.support.helpers import slowTest
  from tests.support.mock import patch
  from tests.support.unit import TestCase
  
  
  class SaltAPITestCase(TestCase):
      @slowTest
      def test_start_shutdown(self):
          api = SaltAPI()
          try:
              # testing environment will fail if we use default pidfile
              # overwrite sys.argv so salt-api does not use testing args
              with patch.object(
                  sys, "argv", [sys.argv[0], "--pid-file", "salt-api-test.pid"]
              ):
                  api.start()
                  self.assertTrue(os.path.isfile("salt-api-test.pid"))
                  os.remove("salt-api-test.pid")
          finally:
              self.assertRaises(SystemExit, api.shutdown)
  
new_contents: import os
  import sys
  
  from salt.cli.api import SaltAPI
  from tests.support.helpers import slowTest
  from tests.support.mock import patch
  from tests.support.unit import TestCase
  
  
  class SaltAPITestCase(TestCase):
      @slowTest
      def test_start_shutdown(self):
          api = SaltAPI()
          try:
              # testing environment will fail if we use default pidfile
              # overwrite sys.argv so salt-api does not use testing args
              with patch.object(
                  sys, "argv", [sys.argv[0], "--pid-file", "salt-api-test.pid"]
              ):
                  api.start()
                  self.assertTrue(os.path.isfile("salt-api-test.pid"))
                  os.remove("salt-api-test.pid")
          finally:
              self.assertRaises(SystemExit, api.shutdown)
  
subject: Drop Py2 and six on tests/unit/cli/test_api.py