These tests can be run by adding -python2 to the tox environment,
such as

    tox -e local-homebrew-macos-standard-python2
    tox -e docker-ubuntu-bionic-standard-python2

Additionally, now local environments (introduced in #29104 for homebrew) respect the environment variable EXTRA_CONFIGURE_ARGS that was already available for docker environments.

CC: @jhpalmieri @dimpase @mwageringel

Component: porting

Author: Matthias Koeppe

Branch/Commit: a33b72a

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/29367