diff --git a/spacy/tests/tokens/test_tokens_api.py b/spacy/tests/tokens/test_tokens_api.py
index 1641ac09b..bdb0cd3b9 100644
--- a/spacy/tests/tokens/test_tokens_api.py
+++ b/spacy/tests/tokens/test_tokens_api.py
@@ -2,6 +2,7 @@ from __future__ import unicode_literals
 
 from spacy.tokens import Doc
 from spacy.en import English
+import numpy
 
 import pytest
 
@@ -155,7 +156,7 @@ def test_merge_hang():
     text = 'through North and South Carolina'
     EN = English(parser=False)
     doc = EN(text, tag=True)
-    heads = np.asarray([[0, 3, -1, -2, -4]], dtype='int32')
+    heads = numpy.asarray([[0, 3, -1, -2, -4]], dtype='int32')
     doc.from_array([HEAD], heads.T)
     doc.merge(18, 32, '', '', 'ORG')
     doc.merge(8, 32, '', '', 'ORG')