How to pass environment variables to pytest

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Another alternative is to use the pytest-env plugin. It can be configured like so:

[pytest]
env = 
    HOME=~/tmp
    D:RUN_ENV=test

the D: prefix allows setting a default value, and not override existing variables passed to py.test.

Note: you can explicitly run pytest with a custom config, if you only sometimes need to run a specialized environment set up:

pytest -c custom_pytest.ini

If you use PyCharm vs pytest-dotenv, this may be helpful

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