De or het testafname?

The correct Dutch article is:

de testafname

How to use testafname

the testafnamede testafname
this testafnamedeze testafname
that testafnamedie testafname
our testafnameonze testafname
your testafnamejouw testafname
every testafnameelke testafname
which testafname?welke testafname?
a big testafname / the big testafnameeen grote testafname, de grote testafname