Wis. Stat. § 6.94
If the person challenged refuses to answer fully any relevant questions put to him or her by the inspector under s. 6.92, the inspectors shall reject the elector's vote. If the challenge is not withdrawn after the person offering to vote has answered the questions, one of the inspectors shall administer to the person the following oath or affirmation: "You do solemnly swear (or affirm) that: you are 18 years of age; you are a citizen of the United States; you are now and for 28 consecutive days have been a resident of this ward except under s. 6.02(2); you have not voted at this election; you have not made any bet or wager or become directly or indirectly interested in any bet or wager depending upon the result of this election; you are not on any other ground disqualified to vote at this election". If the person challenged refuses to take the oath or affirmation, the person's vote shall be rejected. If the person challenged answers fully all relevant questions put to the elector by the inspector under s. 6.92, takes the oath or affirmation, and fulfills the applicable registration requirements, and if the answers to the questions given by the person indicate that the person meets the voting qualification requirements, the person's vote shall be received.
Wis. Stat. § 6.94