'The first item in list_display can be the same as the first in
list_editable.'

def test_list_display_first_item_same_as_list_editable_first_item(self):

    class ProductAdmin(ModelAdmin, ):
        list_display = ['name', 'slug', 'pub_date']
        list_editable = ['name', 'slug']
        list_display_links = ['pub_date']
    self.assertIsValid(ProductAdmin, ValidationTestModel)
