Testa conducted fumigations for the Wehrmacht and supplied them with Zyklon B. They also offered courses to the SS in the safe handling and use of the material for fumigation purposes.
Testa levou a cabo tarefas de fumigación para a Wehrmacht e fornecíalle Zyklon B. Tamén impartía cursos para as SS na seguridade durante a manipulación e uso do material na fumigación.