def METHOD_NAME(self):
    """An instructor should not be able to delete a file_depository in read_only."""
    file_depository = FileDepositoryFactory()
    jwt_token = InstructorOrAdminLtiTokenFactory(
        playlist=file_depository.playlist,
        permissions__can_update=False,
    )
    self.assertEqual(FileDepository.objects.count(), 1)
    response = self.client.delete(
        f"/api/filedepositories/{file_depository.id!s}/",
        HTTP_AUTHORIZATION=f"Bearer {jwt_token}",
        content_type="application/json",
    )
    self.assertEqual(response.status_code, 403)
    self.assertEqual(FileDepository.objects.count(), 1)