When running a unittest-based test suite which makes use of subtests, failed subtests are correctly reported at the end of a run (possibly a bit too much as it's hitting #13905 / #13986), however when re-running tests using --lf they seem to skipped.
Originally observed on pytest 9.0.2 / uv python 3.12, reproduced on 9.0.3 / uv python 3.14, running on linux mint 22.3
$ uv run pytest
==== test session starts ===
platform linux -- Python 3.14.2, pytest-9.0.3, pluggy-1.6.0
rootdir: /tmp/testdir
configfile: pytest.ini
collected 1 item
test_qux.py . [100%]
=== FAILURES ===
__________________________________________________________________________________________________________ FooTest.testX (index=1) ___________________________________________________________________________________________________________
self = <test_qux.FooTest testMethod=testX>
def testX(self):
for i in range(5):
with self.subTest(index=i):
> self.assertEqual(i % 2, 0)
E AssertionError: 1 != 0
test_qux.py:9: AssertionError
__________________________________________________________________________________________________________ FooTest.testX (index=3) ___________________________________________________________________________________________________________
self = <test_qux.FooTest testMethod=testX>
def testX(self):
for i in range(5):
with self.subTest(index=i):
> self.assertEqual(i % 2, 0)
E AssertionError: 1 != 0
test_qux.py:9: AssertionError
======================================================================================================= short test summary info ===
SUBFAILED(index=1) test_qux.py::FooTest::testX - AssertionError: 1 != 0
SUBFAILED(index=3) test_qux.py::FooTest::testX - AssertionError: 1 != 0
=== 2 failed, 1 passed in 0.04s ===
$ uv run pytest --cache-show
=== test session starts ===
platform linux -- Python 3.14.2, pytest-9.0.3, pluggy-1.6.0
rootdir: /tmp/testdir
configfile: pytest.ini
cachedir: /tmp/testdir/.pytest_cache
--- cache values for '*' ---
cache/nodeids contains:
['test_qux.py::FooTest::testX']
=== no tests ran in 0.00s ===
$ uv run pytest --lf --lfnf=none
=== test session starts ===
platform linux -- Python 3.14.2, pytest-9.0.3, pluggy-1.6.0
rootdir: /tmp/testdir
configfile: pytest.ini
collected 1 item / 1 deselected / 0 selected
run-last-failure: no previously failed tests, deselecting all items.
=== 1 deselected in 0.00s ===# test_qux.py
import unittest
class FooTest(unittest.TestCase):
def testX(self):
for i in range(5):
with self.subTest(index=i):
self.assertEqual(i % 2, 0)# pyproject.toml (mostly so uv knows to fetch pytest)
[project]
name = "testdir"
version = "0.1.0"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.14"
dependencies = []
[dependency-groups]
dev = [
"pytest>=9.0.3",
]And an empty pytest.ini to ensure pytest gets the correct rootdir (not sure it's necessary with the pyproject.toml but...)
When running a unittest-based test suite which makes use of subtests, failed subtests are correctly reported at the end of a run (possibly a bit too much as it's hitting #13905 / #13986), however when re-running tests using
--lfthey seem to skipped.Originally observed on pytest 9.0.2 / uv python 3.12, reproduced on 9.0.3 / uv python 3.14, running on linux mint 22.3
And an empty pytest.ini to ensure pytest gets the correct rootdir (not sure it's necessary with the pyproject.toml but...)