Python test runner reliability issues with vs code version 1.6

[briansmi]

Does this issue occur when all extensions are disabled?: No

• VS Code Version:1.60.0
• OS Version: Win 10.0.19043

Steps to Reproduce:

I just upgraded to 1.6 and I'm have serious test runner reliability issues. I'm using the ms extensions for Python and vscode-pylance. For testing I'm using python.testing.unittest. Every time I start a test run on a fraction of my ~180 tests actually run. I've never had this issue previously and my 180 test suite runs very reliably in about 10 seconds. This is really frustrating as testing is so critical to my development workflow.

1. Clear All test Results
2. Run All tests - from the root test to ensure that all tests are run
3. Random number of tests (for example, 47/47 or 58/58 or 122/122) will run out of a suite of 180 tests
   4.Maybe 1 out of 8 runs will run all 180 tests

Not sure if this is related, but I see an 'ERROR: read ECONNRESET' after each test execution in the python output

[wind-chh]

I have the same issue. "run tests" will run a subset of all tests, and it's much more slower then ever before.

[briansmi]

Looks like lots of folks are seeing this class of behavior with the new 1.6 update (or the updated ms-python extension) Here's another bug report I that I saw in the vscode-python repo: #17282