I added a call to configure_html_report_env() so that I could display user passed in options used to execute the tests and any values that are set to 0, None, and False are being filtered out in this call https://github.com/pytest-dev/pytest-html/blob/master/pytest_html/plugin.py#L469.

@pytest.fixture(scope='session', autouse=True)
def configure_html_report_env(request):
  env = {'My Custom Option 1': 0,
         'My Custom Option 2': None,
         'My Custom Option 3': False,
         'My Custom Option 4': str(0),
         'My Custom Option 5': str(None),
         'My Custom Option 6': str(False)}

  request.config._metadata.update(env)

Is there a reason for this filter? I can wrap what I pass in with str() but I wanted to make sure I am correctly following how this section should be used. Thanks!