[EPEL-devel] epel8-playground target ignores build overrides?

My epel8 build for python-extras succeeded just fine (using python-testtools from a build override as a dependency - https://bodhi.fedoraproject.org/overrides/python-testtools-2.4.0-3.el8), but the epel8-playground build claims python-testtools is not available: epel8:

[EPEL-devel] Fedora EPEL 8 updates-testing report

The following Fedora EPEL 8 Security updates need testing: Age URL 6 https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-7f0ce51dbd python-bleach-3.1.4-2.el8 3 https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-72116e7775 chromium-81.0.4044.122-1.el8 3

[EPEL-devel] Fedora EPEL 6 updates-testing report

The following Fedora EPEL 6 Security updates need testing: Age URL 5 https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-2e91626690 php-horde-horde-5.2.22-1.el6 5 https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-ed97a34306 qt5-qtbase-5.6.1-6.el6 5