Wis. Stat. § 103.37: Certain requirements to obtaining employment prohibited.

(1m) In this section:

(a) “Employee” means a person who may be permitted, required or directed by an employer, in consideration of direct or indirect gain or profit, to engage in any employment.

(b) “Employer” means an individual, partnership, association, corporation, limited liability company, legal representative, trustee, receiver, trustee in bankruptcy, or any common carrier by rail, motor, water or air doing business in or operating within the state.

(2m) No employer may require any employee or applicant for employment to pay the cost of a medical examination required by the employer as a condition of employment.

(4) Any employer who violates this section may be fined not more than $100 for each violation. The department shall enforce this section.