Wis. Stat. § 879.35: Costs in will contests.

Costs may be awarded out of the estate to an unsuccessful proponent of a will if the unsuccessful proponent is named in the will to act as personal representative and propounded the document in good faith, and to the unsuccessful contestant of a will if the unsuccessful contestant is named to act as personal representative in another document propounded by the unsuccessful contestant in good faith as the last will of the decedent.