Ensure words are added to vocab before test, so that the lexicon is updated correctly.

spacy/tests/website/conftest.py

@@ -10,9 +10,11 @@ def nlp():
         data_dir = os.environ.get('SPACY_DATA')
     else:
         data_dir = None
-    return English(data_dir=data_dir)
+    return English(path=data_dir)
 
 
 @pytest.fixture()
 def doc(nlp):
+    for word in ['Hello', ',', 'world', '.', 'Here', 'are', 'two', 'sentences', '.']:
+        _ = nlp.vocab[word]
     return nlp('Hello, world. Here are two sentences.')