In order to run the tests locally with `./mvnw test` you need to have docker running because Spring Data Elasticsearch uses https://www.testcontainers.org/[Testcontainers] to start a local running Elasticsearch instance.
Test classes that do depend on the client have either `ERHLC` (when using the deprecated Elasticsearch `RestHighLevelClient`) or `ELC` (the new `ElasticsearchClient`) in their name.