Fixed #20449 - Corrected test sensitivity to current working dir.

from contextlib import contextmanager

import os

from django.test import TestCase

from django.test.runner import DiscoverRunner

        self.assertEqual(count, 1)

    def test_file_path(self):

        @contextmanager

        def change_cwd_to_tests():

            """Change CWD to tests directory (one level up from this file)"""

            current_dir = os.path.abspath(os.path.dirname(__file__))

            tests_dir = os.path.join(current_dir, '..')

            old_cwd = os.getcwd()

            os.chdir(tests_dir)

            yield

            os.chdir(old_cwd)

        with change_cwd_to_tests():

            count = DiscoverRunner().build_suite(

                ["test_discovery_sample/"],

            ).countTestCases()