new_contents: # Generated by Django 2.1.3 on 2019-01-14 21:26
  
  from django.conf import settings
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('billjobs', '0008_auto_20180308_1312'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='bill',
              name='user',
              field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, verbose_name='Coworker'),
          ),
          migrations.AlterField(
              model_name='billline',
              name='bill',
              field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='billjobs.Bill'),
          ),
          migrations.AlterField(
              model_name='billline',
              name='service',
              field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='billjobs.Service'),
          ),
          migrations.AlterField(
              model_name='userprofile',
              name='user',
              field=models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL),
          ),
      ]
  
subject: create migration file to fix tests errors