"FreeCAD -t 0" performs approx 470 tests. No GUI required. Example
output starts here:
https://travis-ci.org/github/FreeCAD/FreeCAD/jobs/689681966#L9103
May need some work to get working from inside mock:
# ./FreeCAD -t 0
FreeCAD 0.18, Libs: 0.18RUnknown
© Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2019
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Aborted (core dumped)
Thanks,
Richard