The cls is obsolete, so all PDF exports are disabled. We keep the
1.6.x and 2.1.x tests because those only check roundtrip
convergence, and do not export to PDF.
# latex8.sty is obsolete and replaced by IEEEconf.
check_load/templates/attic/latex8
export/templates/attic/latex8_pdf.*
-export/templates/attic/latex8_(dvi|dvi3_.*)
+export/templates/attic/latex8_(dvi|dvi3_.*|lyx(22|23))
# aastex.cls is obsolete and replaced by aastex6.cls
# aastex6.cls is obsolete and replaced by aastex62.cls