Running Flask Tests without installing the app

| ci | programming | python |

The Flask Docs have a great section for testing. However they assume that you have the app installed with pip install -e . which I almost never do. (Maybe I should start?) I have had trouble with this approach. So one little hack to inject your app into the searchable python path is to do something like this:

export BLOG_PATH=$(pwd) && python tests/blog_tests.py
We use \$(pwd) so that this will "just work" no matter which computer you run it on (i.e. test, dev, other persons dev) Then in yourtests/blog_tests.py file you import your flask app like this:
sys.path.insert(0, os.environ.get('BLOG_PATH'))
from blog.blog import app, init_db
You can see the full details here: https://circleci.com/gh/levlaz/blog My biggest issue with installing the app in a traditional sense is that when I run it with apache mod_wsgi it does not seem to actually copy over the right folders and apache is not able to find templates or static files. So that sucks, and I am probably doing something wrong. But this approach works more or less no matter what so sometimes a hack is better than derping around with no solution (as I did for six hours yesterday).

Thank you for reading! Share your thoughts with me on bluesky, mastodon, or via email.

Check out some more stuff to read down below.

Most popular posts this month

Recent Favorite Blog Posts

This is a collection of the last 8 posts that I bookmarked.

Articles from blogs I follow around the net

Go Read a Book

There's a lot of shitty news happening lately, and I've been having trouble holding space for it all.

via flower.codes January 24, 2026

ROSCon Korea 2026 Review

After attending my first ever ROSCon in Singapore 3 months ago, I had a chance to participate in the first ever regional ROSCon in (South) Korea! Physical AI is here I had an interesting discussion with a team lead at ROBOTIS, a major Robotics company , o…

via Junwoo Hwang January 24, 2026

[RIDGELINE] Eras

Ridgeline subscribers — I like “eras.” That is, named chunks of time. Japanese history tends to periodicize based on locus of power. The Tokugawa Shogunate reigned for hundreds of years, and so: Edo, where the power was, becomes the period (a big sweeping o…

via Craig Mod — Writer + Photographer January 24, 2026

Generated by openring