Running Flask Tests without installing the app

April 8, 2017 | 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.

The circus freaks of open source from Drew DeVault's blog
Clanker: A Word For The Machine from Armin Ronacher's Thoughts and Writings
I ran a half-marathon! from gluecko.se
My Running Tips from Kevin Bell's Blog
tweet from Derek Sivers blog
My life was changed by four sentences in four books from Derek Sivers blog
The world reveals itself to those who travel by foot from Escaping Flatland
45 things from Sean Voisen

Articles from blogs I follow around the net

“They had the simplest task in the world.”

This is a really nice set of transitions when pinching in and out in Photos in iOS 26. This is trickier than it seems, because it’s not just a linear zoom (like it would be in Maps or Sketch, for example). It’s a zoom and reflow – from 3 items to 1 item pe...

via Unsung June 13, 2026

Pluralistic: Shareholder supremacy and the precog CEO (13 Jun 2026)

Today's links Shareholder supremacy and the precog CEO: A bright line test that's totally unfalsifiable. Hey look at this: Delights to delectate. Object permanence: Msft v Linux geeks; James Joyce scholars v Joyce estate; iPod sweatshops; Pratchett initiat...

via Pluralistic: Daily links from Cory Doctorow June 13, 2026

Dangerous Technology For Americans Only

There is a bit of schadenfreude on Twitter right now about Anthropic being hit by the US government’s export control directive to suspend access to Fable and Mythos. Anthropic and their leadership have spent a lot of time and effort describing its own tech...

via Armin Ronacher's Thoughts and Writings June 13, 2026

Generated by openring