SystemExit running units tests

[david-waterworth]

I'm getting the same exception as #1529

Running on Ubuntu 18.04 python 3.7.2

I can reproduce with the trivial example below. This file resides in a subfolder in my project.

import unittest

class Test(unittest.TestCase):
    def test_(self):
        self.assertTrue(True)

if __name__ == '__main__': 
    unittest.main()

launch.json is

    {
        "name": "Python: Current File (Integrated Terminal)",
        "type": "python",
        "request": "launch",
        "program": "${file}",
        "console": "integratedTerminal"
    },

I've also been unable to get 'Discover Unit Tests' to work, not sure if that's related. But I can run from the command line

python -m unittest tests

Works fine (I did have to add init.py and explicitly import tests from each file in .\tests by I guess that's normal)

[d3r3kk]

Duplicate of #3201