pytest --lf does not work if __init__.py files are present #7894
Description
When there are failing tests in sibling sub-directories of the tests directory with __init__.py files, pytest --lf runs the failing tests from only one of the directories, not all the tests that failed on the last run. We need to use __init.py__ files if test files in different directories have the same name. But then pytest --lf fails to run as expected. If the __init__.py files are removed, then the --lf option runs all the failing tests.
pip list output:
Package Version Location
------------------ ------- ------------------------------------
attrs 19.3.0
autopep8 1.5.2
click 7.1.2
coverage 5.3
entrypoints 0.3
flake8 3.7.9
importlib-metadata 1.6.0
iniconfig 1.0.1
mccabe 0.6.1
more-itertools 8.2.0
packaging 20.3
pip 20.1
pkg-resources 0.0.0
pluggy 0.13.1
py 1.9.0
pycodestyle 2.5.0
pyflakes 2.1.1
pyparsing 2.4.7
pytest 6.1.1
pytest-cov 2.10.1
setuptools 39.0.1
six 1.14.0
tasks 0.1.0 /home/dp/testing/code/tasks_proj/src
tinydb 3.15.1
toml 0.10.1
wcwidth 0.1.9
zipp 3.1.0
pytest version - 6.1.1
OS - Ubuntu 18.04
Example
Test directory structure
--------------------------
tests/
__init__.py
func/
__init__.py
test_one.py
unit/
__init__.py
test_one.py
Contents of func/test_one.py
----------------------------
def test_ne_one():
assert 5 != 5
Contents of unit/test_one.py
-----------------------------
def test_eq_one():
assert 1 == 2
Running pytest from tests/ directory reports 2 failing tests. But pytest --lf runs only 1 test - func/test_one.py - and skips the other. If the __init__.py files are removed and the test files are given different names, then pytest --lf runs both tests as expected.