diff --git a/setup.py b/setup.py
index b4f9826..c80bfa9 100755
--- a/setup.py
+++ b/setup.py
@@ -182,7 +182,7 @@ extras_require = dict(
     parallel = ['ipyparallel'],
     qtconsole = ['qtconsole'],
     doc = ['Sphinx>=1.3'],
-    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel'],
+    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel', 'numpy'],
     terminal = [],
     kernel = ['ipykernel'],
     nbformat = ['nbformat'],