This film was not (as is often reported) a "screen test" of sorts produced by MGM to help the studio decide which of the two girls, Deanna Durbin or Judy Garland, to keep under contract. Durbin was released by MGM and signed by Universal prior to this movie's production. A 1 June 1936 blurb in "The Hollywood Reporter" states that "Universal has changed Edna Mae Durbin's name to 'Dianna' [sic]." This movie, it appears, was not produced until at least July 1936, by which time Durbin had already been signed by Universal and cast in her debut vehicle, Three Smart Girls (1936). The reason she appears in this film is that there was reportedly a provision in her MGM contract that entitled the studio to request her services for up to 60 days following its termination, provided she wasn't already shooting a film at her new studio. As filming on "Three Smart Girls" wasn't scheduled to begin until September 1936, Durbin found herself back at MGM making this short with Garland. This is why, although her on-screen character is called "Edna" in the short (Deanna's real name), in the credits she is billed under the name by which she would soon become internationally famous, "Deanna".
While Judy Garland is referred to in the film as "Judy", Deanna Durbin is referred to by her real name, Edna.
George Sidney, believed to be the line producer, has said that MGM executives instructed him to "dump the fat one" (meaning Judy Garland) after viewing this short film. But Judy was signed to MGM and Deanna Durbin was let go, to be snapped up by Universal Pictures.