Repro steps:

export DATADOG_API_KEY=<your_api_key>
nvm use
yarn
yarn test

There are just 2 deps, npm i should be fine if you don't have yarn installed.

Expected result:

Something mentioning test service my-javascript-service in https://app.datadoghq.com/ci/test-runs. Or something in the terminal.

Actual result:

Nothing in the terminal, the same output as yarn coverage.