[issue46425] Multiple test modules fail to run if invoked directly

[Jason R. Coombs]

Change by Jason R. Coombs <jaraco at jaraco.com>:


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pull_requests: +28990
pull_request: https://github.com/python/cpython/pull/30803

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46425>
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