[chirp_devel] run_tests: No module named serial

I just did a clean clone of the repository.

Per the process outlined at http://chirp.danplanet.com/projects/chirp/wiki/DevelopersProcess I thought I'd see how the tests run before I make any changes:

dan[tests]$ run_tests Traceback (most recent call last): File "./run_tests", line 20, in <module> from serial import Serial ImportError: No module named serial

I searched the developer mail archive, and looked at the hg history info for the file, I don't see anything related. I'm probably missing something silly, but I don't know what it is.

I'm on a Mac running OS X 10.9.2 Chirp runs ok, it says I'm using (Python 2.7.2).

What am I missing?

-dan