[py3] Fixed admin_scripts tests

                os.remove(full_name + 'c')

        except OSError:

            pass

        # Also remove a __pycache__ directory, if it exists

        cache_name = os.path.join(test_dir, '__pycache__')

        if os.path.isdir(cache_name):

            shutil.rmtree(cache_name)

    def _ext_backend_paths(self):

        """

        python_path.extend(ext_backend_base_dirs)

        os.environ[python_path_var_name] = os.pathsep.join(python_path)

        # Silence the DeprecationWarning caused by having a locale directory

        # in the project directory.

        cmd = [sys.executable, '-Wignore:::django.utils.translation', script]

        # Move to the test directory and run

        os.chdir(test_dir)

        out, err = subprocess.Popen(cmd + args,

                stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()

        out, err = subprocess.Popen([sys.executable, script] + args,

                stdout=subprocess.PIPE, stderr=subprocess.PIPE,

                universal_newlines=True).communicate()

        # Restore the old environment

        if old_django_settings_module: