[Biopython] help - Biopython Install

[Tomlin, Joshua James]

I'm trying to install biopython on my laptop. I have mac os x 10.7.5, python 2.7, and have installed numpy I believe.
I can run the 'import Bio' command in python without any errors but when I try run 'python setup.py test' I get 6 errors which you can see below.

Basically I need to know if I have done everything I need to do correctly? If I have then why are these 6 tests failing and will that impact my future use of biopython?

Thanks.

Python version: 2.7.4 (v2.7.4:026ee0057e2d, Apr  6 2013, 11:43:10)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
Operating system: posix darwin
test_Entrez_online ... FAIL
test_SearchIO_write ... FAIL
test_SeqIO_index ... FAIL
test_Tutorial ... FAIL
test_bgzf ... FAIL
Bio.bgzf docstring test ... FAIL
----------------------------------------------------------------------
Ran 213 tests in 296.686 seconds

FAILED (failures = 6)