'Raise exception for custom tags used in child with {% load %} tag in parent, not in child'

@setup({'exception04': "{%    extends    'inheritance17'    %}{%    block    first    %}{%    echo    400    %}5678{%    endblock    %}"}, inheritance_templates)
def test_exception04(self):

    with self.assertRaises(TemplateSyntaxError):
        self.engine.get_template('exception04')
