yarn test

https://classic.yarnpkg.com/lang/en/docs/cli/test/

yarn test --help
yarn run v1.22.19
error Couldn't find a package.json file in "/Users/your-user"
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Related

• yarn --help
• yarn test --coverage

See also

• yarn test, --coverage
• yarn [ create | list | up | add | run | install | build | transpile | transpile-watch | wsrun| version | --help ]