diff --git a/spacy/tests/vocab/test_add_vectors.py b/spacy/tests/vocab/test_add_vectors.py
new file mode 100644
index 000000000..b2bd812cf
--- /dev/null
+++ b/spacy/tests/vocab/test_add_vectors.py
@@ -0,0 +1,12 @@
+import numpy
+
+import spacy.en
+
+
+def test_add_vector():
+    vocab = spacy.en.English.Defaults.create_vocab()
+    vocab.resize_vectors(10)
+    lex = vocab[u'Hello']
+    lex.vector = numpy.ndarray((10,), dtype='float32')
+    lex = vocab[u'Hello']
+    assert lex.vector.shape == (10,)