The left-handed batsman impressed for the New Zealand XI in the three day match against Zimbabwe, scoring 65 in the first innings, combining with BJ Watling for a 125-run sixth wicket partnership on the opening day.
The 27-year-old debuted for Otago in the 2007-08 season and has scored two first class centuries with a high score of 115 not out.
He has scored 228 runs in this season's Plunket Shield competition, including three half-centuries, averaging 38. With the ball Wells has taken just two wickets at an average of 78.5.
Black Caps coach John Wright said: "Sam is a talented all-rounder and we are confident if the opportunity arises he will perform well at international level for New Zealand.
"He has impressed during the three-day match in Gisborne with the bat, and his skills with the ball will give good balance to the side."
Black Caps test squad: Ross Taylor (c), Trent Boult, Doug Bracewell, Dean Brownlie, Martin Guptill, Chris Martin, Brendon McCullum, Tim Southee, Daniel Vettori, Kruger van Wyk, BJ Watling, Sam Wells, Kane Williamson
- HERALD ONLINE
