The test case is counting "all commits in the past 6 years", which it assumes will give all the results from the log. However, all the commits in the test repo were made in early November 2007, which means that from November to December it doesn't find any commits. I just bump up the year count to make sure it always gets all the commits.

I can change this to 2006 (or something else entirely) if it's more clear.