$ build/sbt "core/test:dependencyTree" | grep logback
Using SPARK_LOCAL_IP=localhost
[info] | +-ch.qos.logback:logback-classic:1.2.13
[info] | | +-ch.qos.logback:logback-core:1.2.13
[info] | +-ch.qos.logback:logback-core:1.2.13
[info] | | +-ch.qos.logback:logback-classic:1.2.13
[info] | | | +-ch.qos.logback:logback-core:1.2.13
[info] | | +-ch.qos.logback:logback-core:1.2.13
[info] | +-ch.qos.logback:logback-classic:1.2.13
[info] | | +-ch.qos.logback:logback-core:1.2.13
[info] | +-ch.qos.logback:logback-core:1.2.13