Test test_script_helper fails, details:

Running Debug|Win32 interpreter...
== CPython 3.8.0a0 (heads/master:6cdb7954b0, Feb 24 2018, 17:25:46) [MSC v.1912 32 bit (Intel)]
== Windows-10-10.0.16299-SP0 little-endian
== cwd: \cpython\build\test_python_7920
== CPU count: 4
== encodings: locale=cp1252, FS=utf-8
Run tests sequentially
0:00:00 [1/1] test_script_helper
test_assert_python_failure (test.test_script_helper.TestScriptHelper) ... ok
test_assert_python_failure_raises (test.test_script_helper.TestScriptHelper) ... ok
test_assert_python_isolated_when_env_not_required (test.test_script_helper.TestScriptHelper) ... ok
test_assert_python_not_isolated_when_env_is_required (test.test_script_helper.TestScriptHelper)
Ensure that -I is not passed when the environment is required. ... ok
test_assert_python_ok (test.test_script_helper.TestScriptHelper) ... ok
test_assert_python_ok_raises (test.test_script_helper.TestScriptHelper) ... ok
test_interpreter_requires_environment_details (test.test_script_helper.TestScriptHelperEnvironment) ... FAIL
test_interpreter_requires_environment_false (test.test_script_helper.TestScriptHelperEnvironment) ... FAIL
test_interpreter_requires_environment_true (test.test_script_helper.TestScriptHelperEnvironment) ... FAIL

======================================================================
FAIL: test_interpreter_requires_environment_details (test.test_script_helper.TestScriptHelperEnvironment)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\andor\Documents\Projects\cpython\lib\unittest\mock.py", line 1191, in patched
    return func(*args, **keywargs)
  File "C:\Users\andor\Documents\Projects\cpython\lib\test\test_script_helper.py", line 101, in test_interpreter_requires_environment_details
    self.assertFalse(script_helper.interpreter_requires_environment())
AssertionError: True is not false

======================================================================
FAIL: test_interpreter_requires_environment_false (test.test_script_helper.TestScriptHelperEnvironment)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\andor\Documents\Projects\cpython\lib\unittest\mock.py", line 1191, in patched
    return func(*args, **keywargs)
  File "C:\Users\andor\Documents\Projects\cpython\lib\test\test_script_helper.py", line 95, in test_interpreter_requires_environment_false
    self.assertFalse(script_helper.interpreter_requires_environment())
AssertionError: True is not false

======================================================================
FAIL: test_interpreter_requires_environment_true (test.test_script_helper.TestScriptHelperEnvironment)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\andor\Documents\Projects\cpython\lib\unittest\mock.py", line 1191, in patched
    return func(*args, **keywargs)
  File "C:\Users\andor\Documents\Projects\cpython\lib\test\test_script_helper.py", line 89, in test_interpreter_requires_environment_true
    self.assertEqual(1, mock_check_call.call_count)
AssertionError: 1 != 0

----------------------------------------------------------------------
Ran 9 tests in 0.240s

FAILED (failures=3)
test test_script_helper failed
test_script_helper failed

1 test failed:
    test_script_helper

Total duration: 281 ms
Tests result: FAILURE