Elasticsearch :found jar hell in test classpath
As @Val observes, a test framework for ES v5 won't work with ES v1.
Why not upgrade to a newer version of ES?
As I recall, the old v1 has some serious security flaws. Plus ES 5 has better performance, etc.
The other thing you can do is decouple your tests from the exact ES version, by using an http library like Jest or ESJC.