# xctest_checker | |
This tool is invoked by the swift-corelibs-xctest functional tests when they use the `{xctest_checker}` lit substitution. For more usage details, execute it from this directory using: | |
```sh | |
./xctest_checker.py -h | |
``` | |
It includes unit tests which can be run with the following command in this directory: | |
```sh | |
python -m unittest discover | |
``` |