# Atoum The Atoum task will run your unit tests. It lives under the `atoum` namespace and has the following configurable parameters: ```yaml # grumphp.yml grumphp: tasks: atoum: config_file: .atoum.php bootstrap_file: tests/units/bootstrap.php directories: - tests/units files: - tests/units/MyTest.php namespaces: - mageekguy\\atoum\\tests\\units\\asserters methods: - mageekguy\\atoum\\tests\\units\\asserters\\string::testContains - mageekguy\\atoum\\tests\\units\\asserters\\string::* tags: - thisIsOneTag - thisIsThreeTag ``` **config_file** *Default: null* The path to your configuration file. If you name your configuration file .atoum.php, atoum will load it automatically if this file is located in the current directory. The config_file parameter is optional in this case. [See atoum documentation](http://docs.atoum.org/en/latest/configuration_bootstraping.html#configuration-file) **bootstrap_file** *Default: null* The path to your bootstrap file if you need any. [See atoum documentation](http://docs.atoum.org/en/latest/configuration_bootstraping.html#bootstrap-file) **directories** *Default: []* If you want to limit the execution of the unit tests to certain directories, list them here. [See atoum documentation](http://docs.atoum.org/en/latest/running_tests.html#by-folders) **files** *Default: []* If you want to limit the execution of the unit tests to certain files, list them here. [See atoum documentation](http://docs.atoum.org/en/latest/running_tests.html#by-files) **namespaces** *Default: []* If you want to limit the execution of the unit tests to certain namespaces, list them here. [See atoum documentation](http://docs.atoum.org/en/latest/running_tests.html#by-namespace) **methods** *Default: []* If you want to limit the execution of the unit tests to certain methods or classes, list them here. [See atoum documentation](http://docs.atoum.org/en/latest/running_tests.html#a-class-or-a-method) **tags** *Default: []* If you want to limit the execution of the unit tests to certain tags, list them here. [See atoum documentation](http://docs.atoum.org/en/latest/running_tests.html#tags)