title: VS Code not finding pytest tests
body: <p>I have PyTest setup in vs-code but none of the tests are being found even though running pytest from the command line works fine.</p>
  
  <p>(I'm developing a Django app on Win10 using MiniConda and a Python 3.6.6 virtual env. VS Code is fully updated and I have the Python and Debugger for Chrome extensions installed)</p>
  
  <p>Pytest.ini:</p>
  
  <pre><code>[pytest]
  DJANGO_SETTINGS_MODULE = callsign.settings
  python_files = tests.py test_*.py *_tests.py
  </code></pre>
  
  <p>vs-code workspace settings:</p>
  
  <pre><code>{
      "folders": [
          {
              "path": "."
          }
      ],
      "settings": {
          "python.pythonPath": "C:\\ProgramData\\Miniconda3\\envs\\callsign\\python.exe",
          "python.unitTest.unittestEnabled": false,
          "python.unitTest.nosetestsEnabled": false,
          "python.unitTest.pyTestEnabled": true,
          "python.unitTest.pyTestArgs": ["--rootdir=.\\callsign", "--verbose"]
      }
  }
  </code></pre>
  
  <p>Finally, the output from the Python Test Log inside VS code:</p>
  
  <pre><code>============================= test session starts =============================
  platform win32 -- Python 3.6.6, pytest-4.1.1, py-1.7.0, pluggy-0.8.1
  Django settings: callsign.settings (from ini file)
  rootdir: c:\Users\benhe\Projects\CallsignCopilot\callsign, inifile: pytest.ini
  plugins: django-3.4.5
  collected 23 items
  &lt;Package c:\Users\benhe\Projects\CallsignCopilot\callsign\transcription&gt;
    &lt;Module test_utils.py&gt;
      &lt;Function test_n_digits&gt;
      &lt;Function test_n_alpha&gt;
      &lt;Function test_n_hex&gt;
      &lt;Function test_n_digits_in_range&gt;
      &lt;Function test_v1_audiofilename&gt;
      &lt;Function test_v2_audiofilename&gt;
      &lt;Function test_v1_bad_int_filename&gt;
      &lt;Function test_v1_bad_non_int_filename&gt;
      &lt;Function test_bad_format&gt;
      &lt;Function test_no_format&gt;
      &lt;Function test_too_many_segments&gt;
      &lt;Function test_too_few_segments&gt;
      &lt;Function test_good_v2_filename&gt;
      &lt;Function test_bad_year_v2_filename&gt;
      &lt;Function test_bad_month_v2_filename&gt;
      &lt;Function test_bad_day_v2_filename&gt;
      &lt;Function test_bad_date_v2_filename&gt;
      &lt;Function test_bad_short_serial_v2_filename&gt;
      &lt;Function test_bad_long_serial_v2_filename&gt;
      &lt;Function test_good_v3_filename&gt;
      &lt;Function test_good_lowercase_block_v3_filename&gt;
      &lt;Function test_bad_non_alpha_block_v3_filename&gt;
      &lt;Function test_real_filenames&gt;
  
  ======================== no tests ran in 1.12 seconds =========================
  </code></pre>
  
  <p>Am I missing any steps to get vs-code to find the tests?</p>