# atoum > A simple, modern and intuitive unit testing framework for PHP. > More information: . - Initialize a configuration file: `atoum --init` - Run all tests: `atoum` - Run tests using the specified configuration file: `atoum {{[-c|--configuration]}} {{path/to/file}}` - Run a specific test file: `atoum {{[-f|--files]}} {{path/to/file}}` - Run a specific directory of tests: `atoum {{[-d|--directories]}} {{path/to/directory}}` - Run all tests under a specific namespace: `atoum {{[-ns|--namespaces]}} {{namespace}}` - Run all tests with a specific tag: `atoum {{[-t|--tags]}} {{tag}}` - Load a custom bootstrap file before running tests: `atoum {{[-bf|--bootstrap-file]}} {{path/to/file}}`