How to test a service in Spring Boot that use an Elasticsearch repository?

So, I wrote a class service that use a repository (extend from ElasticsearchRepository). All operations are performed on an elasticsearch instance running on a remote server. Now, I want to test my service, test (save, delete, search) operations, but I can't test on elasticsearch instance from the server. I must to test on another instance of elasticsearch. How can I do it ? Thanks!