old_contents: # coding: utf8
  from __future__ import unicode_literals
  
  import pytest
  from spacy.lang.en import English
  from spacy.tokens import Doc
  
  
  @pytest.mark.xfail
  def test_issue3468():
      """Test that sentence boundaries are serialized if they're not set by the
      dependency parser."""
      nlp = English()
      nlp.add_pipe(nlp.create_pipe("sentencizer"))
      doc = nlp("Hello world")
      assert doc[0].is_sent_start
      assert doc.is_sentenced
      assert len(list(doc.sents)) == 1
      doc_bytes = doc.to_bytes()
      new_doc = Doc(nlp.vocab).from_bytes(doc_bytes)
      assert doc[0].is_sent_start
      assert new_doc.is_sentenced
      assert len(list(new_doc.sents)) == 1
  
new_contents: # coding: utf8
  from __future__ import unicode_literals
  
  import pytest
  from spacy.lang.en import English
  from spacy.tokens import Doc
  
  
  @pytest.mark.xfail
  def test_issue3468():
      """Test that sentence boundaries are serialized if they're not set by the
      dependency parser."""
      nlp = English()
      nlp.add_pipe(nlp.create_pipe("sentencizer"))
      doc = nlp("Hello world")
      assert doc[0].is_sent_start
      assert doc.is_sentenced
      assert len(list(doc.sents)) == 1
      doc_bytes = doc.to_bytes()
      new_doc = Doc(nlp.vocab).from_bytes(doc_bytes)
      assert new_doc[0].is_sent_start
      assert new_doc.is_sentenced
      assert len(list(new_doc.sents)) == 1
  
subject: Fix test for #3468