New Scout Leader

One weekend Henriett was the new scout leader of the Squirrel Squad. Her husband was ill, so she had to fill-in his place and go for her very first camping weekend.
As a new scout leader, she wanted to take care of everything, so she assigned different duties to each scout.
Luke was responsible for the maps and time schedules, Ian would be the cook, Frank was responsible for food supplies, and Henriett herself would pre-test all their equipment.
After arriving at the foot of the mountain, the new scout leader decided to eat something before the hike.
A few minutes later Ian the cook said, 'Henriett, look, I can't light a fire with the matches you brought.'
Henriett replied, 'Why, those matches should be okay. I had tested all of them!'