T2-6 set both variables in os.environ directly and restored them in a
finally block; a failing assertion between the two could still leak them to
later tests in the process. They are now set with monkeypatch.setenv (the
wt_repo fixture already delenvs both). The assertions are unchanged.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017R3Eg7MEpSWnm1oB9ZPP6G