Martin Pool has voted approve. Status is now: Approved Comment: + inv['file-id'].text_sha1 = 'A' It may be a yagni, but I would have used plausibly formatted data for the test cases - ie 40 hex characters for the sha. For details, see: http://bundlebuggy.aaronbentley.com/request/%3C1189723511.29560.3.camel%40lifeless-64%3E