How do I use the automated tests?

Hi there. I need to maintain a digital diary for some personal reasons, and found RedNotebook to fit my needs well. As I played around with the application for some days I fould some areas of improvement. And since I know a bit about software development I decided to check out the code and see if I can contribute.

As I like to practice Test-Driven Development I found the tests/ directory and the dev/run-tests.sh script and tried to run those tests before making changes. Because 'run-tests.sh' sounds like it is running the tests. But it actually runs static analysis tools and some other weird underscore stuff, but does not actually execute those test_*.py files. You can verify it by flipping an assert, it seems they are just analyzed, but not executed.

But before reaching to this point I struggled with the static analysis, which currently does not pass too:

✔ ~/Coding/rednotebook [master|✚ 1]
$ dev/run-tests.sh
rednotebook/info.py:186:9: E126 continuation line over-indented for hanging indent
rednotebook/info.py:187:9: E126 continuation line over-indented for hanging indent
rednotebook/info.py:188:9: E126 continuation line over-indented for hanging indent
rednotebook/gui/clouds.py:176:18: E128 continuation line under-indented for visual indent

So my question is: are you taking those tests seriously?
And if yes, how is one supposed to use them?
And are these tests integrated in the build process?