'Regression test for #15669 - Include app label in admin validation messages'

def test_app_label_in_admin_validation(self):

    class RawIdNonexistingAdmin(admin.ModelAdmin, ):
        raw_id_fields = ('nonexisting',)
    self.assertRaisesMessage(ImproperlyConfigured, "'RawIdNonexistingAdmin.raw_id_fields'    refers    to    field    'nonexisting'    that    is    missing    from    model    'admin_validation.Album'.", RawIdNonexistingAdmin.validate, Album)
