Bug report

Three tests in test_import leave files in the current directory:

$ ./python -m test --fail-env-changed test_import -m test.test_import.ImportTests.test_import
Warning -- files was modified by test_import
Warning --   Before: []
Warning --   After:  ['__pycache__/']
Result: ENV CHANGED

• ImportTests.test_import and ImportTracebackTests.test_unencodable_filename import a temporary script and do not remove the __pycache__ directory created for it.
• ImportTests.test_import_in_del_does_not_crash creates a script with make_script() and never unlinks it, leaving @test_<pid>_tmpæ.py.

Running the whole file passes: the leftovers are removed by other tests before the environment is checked.

Linked PRs

• gh-155731: Clean up files left by test_import #155735
• [3.15] gh-155731: Clean up files left by test_import (GH-155735) #155739
• [3.14] gh-155731: Clean up files left by test_import (GH-155735) #155740
• [3.13] gh-155731: Clean up files left by test_import (GH-155735) #155741