Inada Naoki added the comment:
This issue is not duplicate of #23882.
In the example, test1 and test1.test2 are namespace package. But they are
specified explicitly.
`./python.exe -m unittest discover test1.test2`
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Python tracker
Karthikeyan Singaravelan added the comment:
I didn't know packages without __init__.py are namespace packages back then and
used empty packages. I guess it's related to the other issues with unittest and
namespace packages issue36723, issue23882 and issue35617
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nosy: +inada.naoki