How do I get more details about failed test assertions on the shell?

[gavenkoa (Oleksandr Gavenko)]

  test {
    testLogging {
      events "passed", "skipped", "failed" //, "standardOut", "standardError"

      showExceptions true
      exceptionFormat "full"
      showCauses true
      showStackTraces true

      showStandardStreams = false
    }
  }