starttypescript[test]
    definetypeface [test] [rm] [serif] [pagella]
    definetypeface [test] [tt] [mono] [firacode]
    definefontfallback [ttupper] [firacode] [uppercasenormal] [offset=uppercasemonospace,force=yes]
    definefontfallback [ttlower] [firacode] [lowercasenormal] [offset=lowercasemonospace,force=yes]
    definetypeface [test] [mm] [math] [pagella] [default] [fallbacks={ttlower,ttupper}]
stoptypescript
setupbodyfont  [test,12pt]

starttext
Test type{Text} with $mathtt{TEST}$
stoptext