Firefighters who took a promotion exam in June will all have to retake the test next year because an investigation found some of the test-takers likely cheated amid lapses in testing security.

The next exam is scheduled for March 15 and will be taken under new policies that city officials say will provide a more secure environment.

In June, fire union officials questioned the scores of five African-American firefighters, leading a black firefighters group to call the suspicions "racially motivated."

City officials looked into the controversy and released a report late last month that recommended the implicated firefighters be disciplined and the test be given again.