python==3.6.4
celery==4.1.0

Steps to reproduce

from project.celery import app


class test_task(celery.Task):
    autoretry_for = (Exception,)
    retry_kwargs = {
        'max_retries': 5,
        'countdown': 10,
    }

    def run(self, *args, **kwargs):
        raise Exception('test')


test_task = app.register_task(test_task())

test_task.delay()

Expected behavior

5 retries of this task with countdown of 10 seconds each.

Actual behavior

No retries at all.

So the main question - is there any way for specifying autoretry_for and retry_kwargs for class-based tasks? Just to mention - function-based tasks works properly with shared_task decorator and this arguments for it.