Wis. Stat. § 893.31: Tenant’s possession that of landlord.

Whenever the relation of landlord and tenant exists between any persons the possession of the tenant is the possession of the landlord until the expiration of 10 years from the termination of the tenancy; or if there is no written lease until the expiration of 10 years from the time of the last payment of rent, notwithstanding that the tenant may have acquired another title or may have claimed to hold adversely to his or her landlord. The period of limitation provided by s. 893.25, 893.26 or 893.27 shall not commence until the period provided in this section expires.