t = int(input())
for _ in range(t):
    n, m = map(int, input().split())
    A = list(map(int, input().split()))
    prev = m - A[0]
    flag = True
    for i in range(1, n):
        if prev > A[i]:
            flag = False
            break
        prev = m - A[i]
    if flag:
        print("Yes")
    else:
        print("No")