Reverse a linked list

I was given 15 minutes to write the code to reverse a singly-linked list.

What do you think of the code style here?

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace LinkedListQuestions
{
    [TestClass]
    public class ReverseLinkedList
    {
        [TestMethod]
        public void ReservseLinkedListTest()
        {
            Node<int> head = new Node<int>();
            Node<int> two = new Node<int>();
            Node<int> three = new Node<int>();
            Node<int> four = new Node<int>();
            head.Value = 1;
            head.Next = two;
            two.Value = 2;
            two.Next = three;
            three.Value = 3;
            three.Next = four;
            four.Value = 4;
            LinkedListHandler.Reserve(ref head);
            Assert.AreEqual(4, head.Value);
            Assert.AreEqual(3, head.Next.Value);
            Assert.AreEqual(2, head.Next.Next.Value);
            Assert.AreEqual(1, head.Next.Next.Next.Value);
        }
    }

    public class LinkedListHandler
    {
        public static void Reserve(ref Node<int> head)
        {
            Node<int> current = head;
            Node<int> previous = null;
            while (current != null)
            {
                Node<int> temp = current.Next;
                current.Next = previous;
                previous = current;
                current = temp;
            }
            head = previous;
        }
    }

    public class Node<T>
    {
        public T Value { get; set; }
        public Node<T> Next { get; set; }
    }
}