In the first years, "Dykes to Watch Out For" consisted of unconnected strips without a regular cast or serialized storyline. However, its structure eventually evolved into a focus on following a set group of lesbian characters. In 1986, Firebrand Books published a collection of the strips to date. In 1987, Bechdel introduced her regular characters, Mo and her friends, while living in St. Paul, Minnesota. "Dykes to Watch Out For" is the origin of the "Bechdel test", which has become a frequently used metric in cultural discussion of film. In 1988, she began a short-lived page-length strip about the staff of a queer newspaper, titled "Servants to the Cause", for "The Advocate". Bechdel has also written and drawn autobiographical strips and has done illustrations for magazines and websites. The success of "Dykes to Watch Out For" allowed Bechdel to quit her day job in 1990 to work on the strip full-time.