Saeed Ajmal has claimed he came through a "private test" on his remodelled bowling action – including the doosra delivery – with flying colours ahead of his official ICC test in Chennai on January 24.
The Pakistan spinner, who took 63 wickets in nine LV = County Championship matches for Worcestershire last season, had the test conducted in a laboratory in Edgbaston.
The 37-year-old has been banned from international cricket since his September after his action was reported during the Sri Lanka-Pakistan Test in Galle the previous month.
Worcestershire Director of Cricket Steve Rhodes has confirmed he wants to re-sign Ajmal – should his new action get ICC approval – for the 2015 season.
Ajmal said: "I cleared the private test. The tests were conducted in Edgbaston and all my deliveries including the 'doosra' were within 15 degrees.
"Look, I want to be as confident in my bowling as I was before (suspension) and want to be effective, so (whether) I can still play the World Cup or cannot play, remains to be seen.
"I want to do what is best for my country and for my team."
Pakistan Cricket Board chairman Shaharyar Khan had ruled out Ajmal's participation in the World Cup.
However, under ICC rules all teams can replace a player before the February 7 deadline, a week before the World Cup starts.