Why maven test dependency include compile dependency?

问题

I do a mvn dependendy:tree and get something like:

|
+- some.dependency:for-test:jar:1.2.3:test    <---- for test only
   +- ...
   +- ...
   +- some.other.dependency:big-dependency:jar:compile  <---- include compile dependency?
      +- lots.of.big:dependencies

Question: Why would a test dependency bring compile dependencies?

Sub-question: I am asking because I try to reduce the size of a shaded jar. How do I get ride of those?

Note: in the tree, the included compiled dependency some.other.dependency:big-dependency appear nowhere else in the tree.

来源：https://stackoverflow.com/questions/62287164/why-maven-test-dependency-include-compile-dependency