SBT测试:测试中的libraryDependencies不满足编译要求

下面是测试用例的片段 src/test/scala :

package example.module

import utest._

object ModuleSpec extends TestSuite { ... }

... 这段代码编译得很好 build.sbt 如下:

val testDependencies: Seq[ModuleID] =
  Seq(
     "com.lihaoyi" %% "utest" % "0.6.5" % "test",
  )

def testSettings: Seq[Setting[_]] =
  Seq(
    libraryDependencies ++= testDependencies)

lazy val root =
  (project in file("."))
    .aggregate(subproject)

lazy val subproject =
  (project in file("subproject"))
    .settings(testSettings: _*)

我的问题是:

如果我添加 Test 轴心 libraryDependencies ,如下图所示?

def testSettings: Seq[Setting[_]] =
    Seq(
      libraryDependencies in Test ++= testDependencies)

更详细地说:

包含 import utest._ 未能编译,这意味着现在声明为 libraryDependencies in Test 被忽视了。

论证:

因为我要在 src/main/test ,我希望如此 测试中的库依赖性 将是本案中必要且充分的信息。换句话说,我不认为需要更大的范围。