[TestClass]
public class TestClass1
{
    [TestMethod]
    [MyTestMethod]
    public void Test1()
    {
    }

    [TestMethod]
    public void Test2()
    {
    }
}

[TestClass]
[MyTestClass]
public class TestClass2
{
    [TestMethod]
    public void Test1()
    {
    }
}

public class MyTestMethodAttribute : TestMethodAttribute
{
    public MyTestMethodAttribute([CallerFilePath] string callerFilePath = "", [CallerLineNumber] int callerLineNumber = -1)
        : base(callerFilePath, callerLineNumber)
    {
    }
}

public class MyTestClass : TestClassAttribute
{
}