Doncaster clinched the Division Three title with a deserved point at Boston.
The visitors could have gone ahead but Paul Bastock saved well from Greg Blundell before Lee Thompson was denied by Andy Warrington at the other end.
Boston's Graeme Jones had an effort cleared off the line while David Noble tested Warrington with a 25-yard shot.
The second half yielded fewer openings although a Blundell shot was deflected wide and only a Mark Albrighton block kept out Steve Melton's late shot.
Boston Utd: Bastock, Beevers, Ellender, Greaves, Chapman, Rusk,
Melton, Noble, Thomas, Jones, Lee Thompson. Subs: Croudson,
Balmer, Angel, Cropper, Hurst.
Doncaster: Warrington, Marples, Foster, Albrighton, Ryan,
Melligan, Green, Doolan, McIndoe, Blundell, Brown. Subs: Collin,
Morley, McGrath, Fortune-West, Ravenhill.
Referee: A Penn (W Midlands).