The Stags stretched their good pre-season form to four matches with a third summer victory.
Mansfield, victorious over Notts County and Leeds United, and only narrowly beaten by two late Aston Villa goals, won their first away match of pre-season thanks to a Matt Rhead tap-in.
Rhead reacted first after Ollie Palmer struck the post a minute before half-time.
Moments earlier the home side, who included former Stags Craig Disley and Nathan Arnold, hit the woodwork themselves.
Swiss keeper Sascha Studer, signed in midweek after impressing in the win over Leeds, again did well.
Ex-Grimsby striker Liam Hearn played against his old club and the visitors included two triallists.
Mansfield Town: Studer, Tafazolli, Riley, Sutton, Beevers, Trialist 1, McGuire, Trialist 2, F. Bell, Rhead, Palmer. Subs: Marsden, Murray, Dempster, A. Bell, Fisher, Clements, Thomas, Heslop, Hearn.