def METHOD_NAME(self):
    """Make sure a script-src/style-src does not have data: or blob:."""
    assert 'blob:' not in base_settings.CSP_SCRIPT_SRC
    assert 'data:' not in base_settings.CSP_SCRIPT_SRC
    assert 'blob:' not in base_settings.CSP_STYLE_SRC
    assert 'data:' not in base_settings.CSP_STYLE_SRC