class Skipper:

    """Skip iso8601 and pretend tests

    RHEL buildroot doesn't have python-iso8601 and python-pretend. Skip

    all tests that use the excluded modules.

    """

    def parse_date(self, datestring):

        pytest.skip(f"iso8601 module is not available.")

    def stub(self, **kwargs):

        pytest.skip(f"pretend module is not available.")

    def raiser(self, exc):

        pytest.skip(f"pretend module is not available.")

import sys

sys.modules["iso8601"] = sys.modules["pretend"] = Skipper()