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docs: clarify confcutdir plugin discovery cutoff #14598

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f4a9001
docs: clarify confcutdir plugin discovery cutoff
Bortlesboat Jun 14, 2026
bfc86c4
docs: add confcutdir changelog fragment
Bortlesboat Jun 20, 2026
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1 change: 1 addition & 0 deletions changelog/12857.doc.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Documented how ``--confcutdir`` affects initial ``conftest.py`` discovery.
7 changes: 5 additions & 2 deletions doc/en/how-to/writing_plugins.rst
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Expand Up @@ -54,8 +54,11 @@ Plugin discovery order at tool startup
:confval:`testpaths` if defined and running from the rootdir, otherwise the
current dir
- for each test path, load ``conftest.py`` and ``test*/conftest.py`` relative
to the directory part of the test path, if exist. Before a ``conftest.py``
file is loaded, load ``conftest.py`` files in all of its parent directories.
to the directory part of the test path, if they exist. Before a ``conftest.py``
file is loaded, load ``conftest.py`` files in its parent directories up to
the :option:`--confcutdir` limit. When ``--confcutdir`` is not provided,
the cutoff defaults to the directory containing the config file, or to the
:ref:`rootdir <rootdir>` if no config file is found.
After a ``conftest.py`` file is loaded, recursively load all plugins specified
in its :globalvar:`pytest_plugins` variable if present.

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