Gradle does not find my tests with Kotlin and JUnit 5 : <p>I have written some basic unit tests with Kotlin and Junit 5. Unfortunately, when I run them from Intellij IDEA, the tests are not found by Gradle.
I am getting the message "No tests found for given includes: [de.mhaug.phd.btcwallet.BasicTests]" from Gradle and the message "Test event not received" from Intellij. </p>

<p>Interestingly, running it from the commandline with "./gradlew :clean :test" reports a successful build. However, my first test is obviously red, so this shows that Gradle did not execute it.</p>

<p>I already tried running it with more verbose output but nothing helpful showed up. Here is a minimal (not) working example:</p>

<pre><code>package de.mhaug.phd.btcwallet

import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Assertions.assertFalse
import org.junit.jupiter.api.Test

class BasicTests {
  @Test
  fun hey() {
    assertEquals(3,1+1)
  }

  @Test
  fun hey2() {
    assertFalse(3==1+1)
  }
}
</code></pre>

<p>This is my build.gradle:</p>

<pre><code>buildscript {
    ext.kotlin_version = '1.2.10'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

group 'de.mhaug.phd'
version '1.0-SNAPSHOT'

apply plugin: 'kotlin'

repositories {
    mavenCentral()
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    compile group: 'org.bouncycastle', name: 'bcprov-jdk16', version: '1.46'
    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.0.2'
    testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.0.2'
//    testCompile group: 'org.junit.platform', name: 'junit-platform-runner', version: ''
//    testCompile group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: '5.0.2'
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
</code></pre>

<p>How can I make Intellij/Gradle execute my tests?</p>
