Install older version of numpy to test on Python 3.3

setup.py

@@ -191,7 +191,7 b' extras_require = dict('
     parallel = ['ipyparallel'],
     qtconsole = ['qtconsole'],
     doc = ['Sphinx>=1.3'],
-    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel', 'numpy'],
+    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel'],
     terminal = [],
     kernel = ['ipykernel'],
     nbformat = ['nbformat'],
@@ -214,6 +214,8 b' install_requires = ['
 # but requires pip >= 6. pip < 6 ignores these.
 
 extras_require.update({
+    'test:python_version >= "3.4"': ['numpy'],
+    'test:python_version < "3.4"': ['numpy<1.12'],
     ':python_version == "3.3"': ['pathlib2'],
     ':sys_platform != "win32"': ['pexpect'],
     ':sys_platform == "darwin"': ['appnope'],