Why the value of the annotationInstanceAttribute #expected of annotation @Test is 'None.class' and not nil?

[VincentBlondeau]

Snippet of code to reproduce (need Junit lib for annotation):

import java.io.IOException;
import org.junit.Test;
public class Temp {

    @Test
    public void test1() throws IOException {       
    }
}

By the way, does one need to have the 2 attributes of @test when none is defined in the instance of the annotation?