## Prerequisites for testing and documentation
The Nominatim test suite consists of behavioural tests (using behave) and
-unit tests (using PHPUnit). It has the following additional requirements:
+unit tests (using PHPUnit for PHP code and pytest for Python code).
+It has the following additional requirements:
* [behave test framework](https://behave.readthedocs.io) >= 1.2.5
* [phpunit](https://phpunit.de) >= 7.3
* [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer)
-* [Pylint](https://pylint.org/)
+* [Pylint](https://pylint.org/) (2.6.0 is used for the CI)
+* [pytest](https://pytest.org)
The documentation is built with mkdocs:
```sh
sudo apt install php-cgi phpunit php-codesniffer \
- python3-pip python3-setuptools python3-dev pylint3
+ python3-pip python3-setuptools python3-dev pylint
-pip3 install --user behave mkdocs
+pip3 install --user behave mkdocs pytest
```
The `mkdocs` executable will be located in `.local/bin`. You may have to add