Github user hyonzin commented on the issue:
https://github.com/apache/zeppelin/pull/1518
I doubted CI's test in this PR, so I tried this test for absolutely same
code in my own repository. And it shows all green.
[travis-ci.org/hyonzin/zeppelin/builds/168996633](https://travis-ci.org/hyonzin/zeppelin/builds/168996633)
I guess all checks are failed in this PR because of cache.
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