Mock an Eureka Feign Client for Unittesting

i am using spring cloud's eureka and feign to communicate between some services (lets say A and B). Now id like to unittest my service layer of a single service (A). The problem is, that this service (A) is using a feign client to request some information of the other service (B).

Running the unittests without any special configuration throws the following exception: java.lang.RuntimeException: com.netflix.client.ClientException: Load balancer does not have available server for client: service-b => but i do not want any server to run.

My question is: Is there a way to mock the feign client, so i can unittest my service (A) without running an eureka instance and service (B)?