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As per https://docs.python.org/3.11/reference/lexical_analysis.html#encoding-declarations, the default encoding of Python files is UTF-8. In fact, it's been the default encoding since Python 3.0 (released in 2008).
Shell environment variables that affect how and what tests are executed: TASKW_SKIP -> Causes any test that needs Taskwarrior (task binary only) to be skipped (TestCase) TASK_USE_PATH -> Causes tests to look for "task" in PATH instead of the default location