_____________________________________ test_svg_surface_get_document_unit _____________________________________

    @pytest.mark.skipif(not hasattr(cairo.SVGSurface, get_document_unit),
                        reason=too old cairo)
    def test_svg_surface_get_document_unit():
        with cairo.SVGSurface(None, 10, 10) as surface:
>           assert surface.get_document_unit() == cairo.SVGUnit.PT
E           AssertionError: assert cairo.SVGUnit.USER == cairo.SVGUnit.PT
E            +  where cairo.SVGUnit.USER = <built-in method get_document_unit of cairo.SVGSurface object at 0x7f3926a48750>()
E            +    where <built-in method get_document_unit of cairo.SVGSurface object at 0x7f3926a48750> = <cairo.SVGSurface object at 0x7f3926a48750>.get_document_unit
E            +  and   cairo.SVGUnit.PT = <class 'cairo.SVGUnit'>.PT
E            +    where <class 'cairo.SVGUnit'> = cairo.SVGUnit

tests/test_surface.py:270: AssertionError
========================================== short test summary info ===========================================
FAILED tests/test_surface.py::test_svg_surface_get_document_unit - AssertionError: assert cairo.SVGUnit.USE...
================================== 1 failed, 261 passed, 3 skipped in 0.41s ==================================

With 1 failing test indicating too-old-cairo how is Arch building it with the tests?