i dont think your wife will need a timer, maybe an egg timer...
mywife did the test in about 5 mins, and checked her answers. many people with a good understanding of english will do it in 5 mins.. + bit for checking answers.

tell your wife not to worry, its not that difficult, esp if your wife got an average of 6 for ielts, which is alot harder, (my wife got an average of 6.5 on her first attempt, but needed 7 !! so that cost another £100, waitiing weeks before she could take it again and an all day test ).