Source: dolfinx Followup-For: Bug #970864 Thanks for your bug report.
DOLFIN-X is a work-in-progress (i.e. not yet officially released). Probably the first thing to try is to update to latest upstream git snapshot. I note the problematic test is in the complex number build. One option is to just skip the test. The real number tests have been passing fine. Upstream may have thoughts on the problem. I'll let them know.