Wis. Stat. § 887.20: Deposition in municipal court.

The municipal judge before whom any civil cause is pending may, on any day on which a trial may be had, after an application has been made for adjournment and before making an order for an adjournment, on the application of either party, showing any cause provided by law therefor, proceed to take the deposition of any witness then in attendance before the municipal judge; and no prior notice shall be required.