$ ./python -m test test_array --fail-env-changed -m test.test_array.ArrayReconstructorTest.test_error
0:00:00 load avg: 17.75 Run tests sequentially
0:00:00 load avg: 17.75 [1/1] test_array
Warning -- warnings.filters was modified by test_array
Warning --   Before: (140159909806320, [], [])
Warning --   After:  (140159909806320, [], [('ignore', re.compile("The 'u' type code is deprecated and will be removed in Python 3.16", re.IGNORECASE), <class 'DeprecationWarning'>, None, 0)]) 
test_array failed (env changed)

== Tests result: ENV CHANGED ==

1 test altered the execution environment:
    test_array

Total duration: 321 ms
Tests result: ENV CHANGED