InvalidArgumentException: You must not expect the generic exception class，
when I test

class MyTest extends PHPUnit_Framework_TestCase
{
/**
* @ExpectedException Exception
* @expectedExceptionMessage Some Message
*/
public function testExceptionHasRightMessage()
{
throw new Exception('Some Message', 20);
}
}

with PHPUnit3.6.7
why ?

IF PHPunit not expect generic exception , why the document has this example?