def METHOD_NAME(self, execute_task):
    """Exists_series plugin: existing"""
    task = execute_task('test')
    assert not task.find_entry(
        'accepted', title='Foo.Bar.S01E02.XViD'
    ), 'Foo.Bar.S01E02.XViD should not have been accepted (exists)'
    assert task.find_entry(
        'accepted', title='Foo.Bar.S01E03.XViD'
    ), 'Foo.Bar.S01E03.XViD should have been accepted'