django_basics_articles_testing CANNOT PASS :( HELP!!!

from django.test import TestCase
from .models import Writer


class WriterModelTestCase(TestCase):
    '''Tests for the Writer model'''
    def test_mailto_method(self):
        writer = Writer.objects.create(
            name="Oliver",
            email="test@email.com"
            bio="asasd"
        )        

        self.assertIn(writer.email, writer.mailto())

from django.db import models


class Article(models.Model):
    headline = models.CharField(max_length=255)
    publish_date = models.DateTimeField()
    content = models.TextField()
    writer = models.ForeignKey('Writer')

    def __str__(self):
        return self.headline


class Writer(models.Model):
    name = models.CharField(max_length=255)
    email = models.EmailField()
    bio = models.TextField()

    def __str__(self):
        return self.name

    def mailto(self):
        return '{} <{}>'.format(self.name, self.email)