Single test run fails if there is an import error in unrelated file

[sjanota]

Environment data

• VS Code version: 1.52.1
• Extension version (available under the Extensions sidebar): v2020.12.424452561
• OS and version: macOS 10.15.7
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.6
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
• Relevant/affected Python packages and their versions: XXX
• Relevant/affected Python-related VS Code extensions and their versions: XXX
• Value of the python.languageServer setting: Pylance

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Expected behaviour

Discovered test should be run without even if there is problem in different test, or at least error should be reported.

Actual behaviour

Even though tests are discovered in testing tab, running single tests causes message "No tests ran, please check the configuration settings for the tests." to appear. No tests are run.

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

I can't reproduce it outside our codebase, which has a lot of things glued on duck tape and Unittest discovery goes crazy, but I think here it is just a problem with error reporting here.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Unhandled exception in thread started by 

[eleanorjboyd]

Hello! Closing as this is the same as this issue, which we are getting to this iteration! I will be fixing this for pytest but if you actually want this for unittest please comment and I will reopen. Thanks!