Wis. Stat. § 32.11: Trial of title.

If any defect of title to or encumbrance upon any parcel of land is suggested upon any appeal, or if any person petitions the court in which an appeal is pending setting up a claim adverse to the title set out in said petition to said premises and to the money or any part thereof to be paid as compensation for the property so taken, the court shall thereupon determine the question so presented. Judgment shall be entered on such determination, with costs to the prevailing party. An appeal from such judgment may be taken as from a judgment in an action.