Minimal working example of __instancecheck__

Question

I am trying to write a stupid __instancecheck__ for class Class so the following will print False:

c = Class()
print(isinstance(c, Class)) # False

I tried to put __instancecheck__ in Class, BaseClass and MetaClass, but nothing works. Here is the code:

class MetaClass(type):
    def __instancecheck__(self, instance):
        return False


class BaseClass(metaclass=MetaClass):
    def __instancecheck__(self, instance):
        return False


class Class(BaseClass, metaclass=MetaClass):
    def __instancecheck__(self, instance):
        return False

c = Class()
print(isinstance(c, Class))  # True

The doc says the method should be in metaclass, I did it, and it's not working and I can't inderstand why. Please tell me where I am wrong.