Without redis in scripts/Docker/requirements.txt the result is:

=========================== short test summary info ============================
FAILED test/test_demo.py::TestDemo::testDemoMinimal - SystemExit: 2
FAILED test/test_demo.py::TestDemo::testDemoClassic - SystemExit: 2
FAILED test/test_demo.py::TestDemo::testDemoJinja - SystemExit: 2
FAILED test/test_cgi.py::FormTestCase::testTokenlessCsrfProtection - IndexErr...
FAILED test/test_cgi.py::TemplateUtilsTestCase::testExpandfile - IndexError: ...
====== 5 failed, 1388 passed, 999 skipped, 1 xfailed in 634.97s (0:10:34) ======

that is doing the following:
using the build container
pip install -r test/requirement.txt
python -m pytest test