New Zealand shed their bridesmaid's tag by claiming the inaugural World Test Championship title with an eight-wicket victory against India in a thrilling final on Wednesday.

Beaten in the finals of the last two 50-overs World Cups, Kane Williamson's team became test cricket's first official world champions after prevailing in a match plagued by bad weather on its reserve day.

"Certainly it's a very special feeling. After a couple of close ones (in ICC finals), nice to get one under the belt," Williamson said at the presentation ceremony. "I've been part of (New Zealand cricket) for a short while, but it's a very special feeling, the first time in our history we've come away with a world title."