How to declare test scope dependencies in Leiningen?

How to declare dependencies to be used in tests only, i.e. the deployed artefact doesn't need them?

The equivalent in maven is <scope>test</scope>:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

The equivalent in sbt is % "test":

libraryDependencies += "org.apache.derby" % "derby" % "10.4.1.3" % "test"