diff --git a/spacy/tests/serialize/test_packer.py b/spacy/tests/serialize/test_packer.py
index 1e79c8247..b1f290589 100644
--- a/spacy/tests/serialize/test_packer.py
+++ b/spacy/tests/serialize/test_packer.py
@@ -20,7 +20,7 @@ from spacy.serialize.bits import BitArray
 
 @pytest.fixture
 def vocab():
-    vocab = Vocab(Language.default_lex_attrs())
+    vocab = Language.default_vocab()
     lex = vocab['dog']
     assert vocab[vocab.strings['dog']].orth_ == 'dog'
     lex  = vocab['the']