diff --git a/spacy/tests/doc/test_doc_api.py b/spacy/tests/doc/test_doc_api.py
index 4281193dd..cbe1bbc66 100644
--- a/spacy/tests/doc/test_doc_api.py
+++ b/spacy/tests/doc/test_doc_api.py
@@ -102,7 +102,7 @@ def test_doc_api_getitem(en_tokenizer):
 def test_doc_api_serialize(en_tokenizer, text):
     tokens = en_tokenizer(text)
     new_tokens = get_doc(tokens.vocab).from_bytes(tokens.to_bytes())
-    assert tokens.string == new_tokens.string
+    assert tokens.text == new_tokens.text
     assert [t.text for t in tokens] == [t.text for t in new_tokens]
     assert [t.orth for t in tokens] == [t.orth for t in new_tokens]