NUnit 3.13.3不在TestFixture派生类程序集的SetupFixture中运行OneTimeSetup和OneTimeEardown

我有一个TestFixture类，它派生自位于不同于TestFixture类的程序集中的基类。基类程序集包含任何命名空间之外的SetupFixture类。我希望SetupFixture的OneTimeSetup和onetimeeardown方法分别在运行开始和结束时运行一次，因为派生类继承自基类。但是，当我在派生类中执行测试时，SetupFixture OneTimexxx方法没有运行。为什么这样不行？

[SetupFixture]
public class SetupFixture   // This is located in AssemblyA
{
    [OneTimeSetUp]
    public void MySetup()
    {
        Console.WriteLine("In Assembly Setup");
    }
    [OneTimeTearDown]
    public void MyTeardown()
    {
        Console.WriteLine("In Assembly Teardown");
    }
}
namespace AssemblyA
{
    [TestFixture]
    public class BaseTestClass    // This is also in AssemblyA
    {
        [Setup]
        public void MySetup()
        {
            Console.WriteLine("In Base Test Setup");
        }
        [TearDown]
        public void MyTeardown()
        {
            Console.WriteLine("In Base Test Teardown");
        }
    }
}
namespace AssemblyB
{
    [TestFixture]
    public class MyTestClass : BaseTestClass       // The derived class is in AssemblyB
    {
        [Test]
        public void MyTest()
        {
           Console.WriteLine("In MyTest");
        }
    }
}