woocommerce/tests/e2e/env/config/custom-environment-variables.json

{
  "url": "SMOKE_TEST_URL",
  "users": {
    "admin": {
      "username": "SMOKE_TEST_ADMIN_USER",
      "password": "SMOKE_TEST_ADMIN_PASSWORD"
    },
    "customer": {
      "username": "SMOKE_TEST_CUSTOMER_USER",
      "password": "SMOKE_TEST_CUSTOMER_PASSWORD"
    }
  }
}