How to install and use plugins¶
This section talks about installing and using third party plugins. For writing your own plugins, please refer to Writing plugins.
Installing a third party plugin can be easily done with
pip install pytest-NAME pip uninstall pytest-NAME
If a plugin is installed,
pytest automatically finds and integrates it,
there is no need to activate it.
Here is a little annotated list for some popular plugins:
pytest-cov: coverage reporting, compatible with distributed testing
pytest-xdist: to distribute tests to CPUs and remote hosts, to run in boxed mode which allows to survive segmentation faults, to run in looponfailing mode, automatically re-running failing tests on file changes.
pytest-instafail: to report failures while the test run is happening.
pytest-bdd: to write tests using behaviour-driven testing.
pytest-timeout: to timeout tests based on function marks or global definitions.
--pep8option to enable PEP8 compliance checking.
pytest-flakes: check source code with pyflakes.
To see a complete list of all plugins with their latest testing status against different pytest and Python versions, please visit Plugin List.
You may also discover more plugins through a pytest- pypi.org search.
Requiring/Loading plugins in a test module or conftest file¶
You can require plugins in a test module or a conftest file using
pytest_plugins = ("myapp.testsupport.myplugin",)
When the test module or conftest plugin is loaded the specified plugins will be loaded as well.
Requiring plugins using a
pytest_plugins variable in non-root
conftest.py files is deprecated. See
in the Writing plugins section.
pytest_plugins is reserved and should not be used as a
name for a custom plugin module.
Finding out which plugins are active¶
If you want to find out which plugins are active in your environment you can type:
and will get an extended test header which shows activated plugins and their names. It will also print local plugins aka conftest.py files when they are loaded.
Deactivating / unregistering a plugin by name¶
You can prevent plugins from loading or unregister them:
pytest -p no:NAME
This means that any subsequent try to activate/load the named plugin will not work.
If you want to unconditionally disable a plugin for a project, you can add
this option to your
[pytest] addopts = -p no:NAME
Alternatively to disable it only in certain environments (for example in a
CI server), you can set
PYTEST_ADDOPTS environment variable to
See Finding out which plugins are active for how to obtain the name of a plugin.