A test failed on a tracked branch ``` [object Object] ``` First failure: [Jenkins Build](https://kibana-ci.elastic.co/job/elastic+kibana+6.5+multijob-intake/5/) <!-- kibanaCiData = {"failed-test":{"test.class":"Browser Unit Tests.Histogram Agg","test.name":"Histogram Agg params \"before each\" hook: workFn for \"should not be written to the DSL\"","test.failCount":19}} -->
