$ ./gradlew clean junitPlatformTest
:clean
:compileKotlin
:compileJava UP-TO-DATE
:copyMainKotlinClasses
:processResources UP-TO-DATE
:classes UP-TO-DATE
:compileTestKotlin
:compileTestJava UP-TO-DATE
:copyTestKotlinClasses
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:junitPlatformTest
Sep 27, 2016 6:34:40 PM org.junit.platform.launcher.core.ServiceLoaderTestEngineRegistry loadTestEngines
INFO: Discovered TestEngines with IDs: [spek]

Test run finished after 66 ms
[         0 tests found      ]
[         0 tests skipped    ]
[         0 tests started    ]
[         0 tests aborted    ]
[         0 tests successful ]
[         0 tests failed     ]
[         0 containers failed]

BUILD SUCCESSFUL