`test_one_similar_script` of `pwb_tests.TestPwb` sometimes fails.
The test intermittently fails with a TimeoutExpired exception. The failure has been observed with Python 3.9 and PyPy 3.11, while other Python versions may pass. It is currently unclear whether the failure is Python-version dependent.
```
18:17:37 FAIL: test_one_similar_script (tests.pwb_tests.TestPwb)
18:17:37 Test shell.py script call which gives one similar result.
18:17:37 ----------------------------------------------------------------------
18:17:37 Traceback (most recent call last):
18:17:37 File "/src/tests/pwb_tests.py", line 118, in test_one_similar_script
18:17:37 self.assertIsNone(stream['timeout'])
18:17:37 AssertionError: TimeoutExpired(['/src/.tox/deeptest-py39/bin/python', '/src/pwb.py', 'hello'], 10) is not None
```