using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var T = int.Parse(Console.ReadLine());

        for (int i = 0; i < T; i++)
        {
            var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var N = input[0];
            var M = input[1];
            var A = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var ans = "Yes";

            if (A.Any(x => x > M)) ans = "No";
            else if (A[0] + A[1] < M) ans = "No";
            else if (A[N - 1] != M) ans = "No";
            else
            {
                for (int j = 1; j < N - 1; j++)
                {
                    if (A[j] < M - A[j - 1])
                    {
                        ans = "No";
                        break;
                    }
                }
            }
            Console.WriteLine(ans);
        }
    }
}