If you want your unit-tests to run against different databases in different environments, how do you specify the database?

Question

I have two db's, one already is running against unit-tests in both jenkins and locally. What I want to do is when we are in Jenkins env then just run the unit-tests against the standard db (this happens already), but if we are in local I want it to connect to another db called local-test-db. I am already able to check if we are in the Jenkins env by asking if 'JENKINS_URL' in os.environ if so then do nothing and have it run against public db, otherwise, we are in local, in which case I want it to connect to the local-test-db.

How is this done?

If we have some check in the beginning of the code like so:

if 'JENKINS_URL' not in os.environ:

# somehow connect to the local-db

I can see both of the db's in mysql just not sure how to specify them in this condition.