Running:

>>> import unittest
>>> unittest.main('my_package.tests.test_module')

results in

Ran 0 tests

OK

The workaround is to install test.support and utilize run_unittest but wow that's a lot of overhead.

The fix also appears to be to use the four-argument version of __import__:

Replace:

with:

    m = __import__(module, None, ['object'], True)

Issue present with:

• MicroPython
  • v1.14 on 2021-02-02; ESP module with ESP8266
  • 3d45bca-dirty on 2021-02-02; linux version
• micropython-unittest
  • 0.3.2