"the testament of dr. mabuse" was lang's second film for the company nero-film and producer seymour nebenzal. the film would be the last film collaboration between lang and his wife thea von harbou, who had worked with lang on all his directorial efforts since "destiny". lang's relationship with von harbou was ending and the two would file divorce papers during 1933. cinematographer fritz arno wagner returned to work with lang. their film credits together include "m", "spies" and "destiny".