Football's rulemakers have agreed to reconsider the introduction of goal-line technology in the sport.
Made up of world governing body FIFA and the football associations of England, Scotland, Wales and Northern Ireland, the IFAB said any system to be considered would have to confirm if a goal had been scored within one second.
The decision was taken at a meeting in Wales and comes just seven months after IFAB had ruled out evaluating goal-line technology in the immediate future.
Calls for the introduction of goal-line technology were amplified after England midfielder Frank Lampard had a goal ruled out despite the ball clearly crossing the line in a last-16 match with Germany at this year's World Cup.
The results of the tests will be presented to IFAB's annual general meeting in March next year.