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I am trying to debug pytest. I would like to inject an environment variable. Here is how I have set launch.json

{
    "type": "python",
    "request": "test",
    "name": "pytest",
    "console": "integratedTerminal",
    "env": {
        "ENV_VAR":"RandomStuff"
    }
},

But it seems when I start debugging. I do not see the env variable injected, as a result my test which expects that env variable fails.

Also I notice error

Could not load unit test config from launch.json

Answers

Could not really figure out how to fix "unit" test debugging with Vscode. But with Pytest one can call tests like python -m pytest <test file>(https://docs.pytest.org/en/stable/usage.html#cmdline) That means Vscode can be configured like a module

"configurations": [
        {
            "name": "Python: Module",
            "type": "python",
            "request": "launch",
            "module": "pytest",
            "args": ["--headful","--capture=no", "--html=report.html"],
        }

This is good enough to do debugging of python tests. Also you can then insert environment variables

   "env": {
        "ENV_VAR":"RandomStuff"
    }