How can younger siblings support older siblings taking a test?

Although they won't admit it, older siblings do love when their younger siblings give them support. Your sibling might be nervous about the test- before they go to school in the morning, give them a hug, then look them in the eye, and say something like, "I know you'll do great on this test" or "I love you! You're gonna do awesomely on this test, I just know it!" Believe it or not, your older siblings need your support more than you realize.