python-progressbar 4.2.0 breaks test_progress.py

The update of progressbar from 4.1.0 to 4.2.0 interestingly changed the returned error code.

 |#                                                                                                                                          |  N/A%  None  ETA:  --:--:-- F
AILED
tests/test_progress.py::test_status_fd PASSED

================================================================================= FAILURES =================================================================================
______________________________________________________________________________ test_progress _______________________________________________________________________________

capsys = <_pytest.capture.CaptureFixture object at 0x7fbc1c6f33d0>, progressbar_err = ''

    @skip_unless_module_exists("progressbar")
    def test_progress(capsys, progressbar_err):
        ret, _, err = run(capsys, TEST_TAR1_PATH, TEST_TAR2_PATH, "--progress")

>       assert ret == 1
E       assert 2 == 1

tests/test_progress.py:69: AssertionError