Colin's Spek system will work w / Gradle

I am getting a crash while spek

trying to find tests. I've tried many different versions and configuration examples. I am running from the command line. Gradle 4.0, mac osx. Any help would be appreciated!

Here is the error:

WARNING: TestEngine with ID 'spek' failed to discover tests
java.lang.NoSuchMethodError: org.junit.platform.commons.util.ReflectionUtils.findAllClassesInClasspathRoot(Ljava/nio/file/Path;Ljava/util/function/Predicate;Ljava/util/function/Predicate;)Ljava/util/List;
        at org.jetbrains.spek.engine.SpekTestEngine.resolveSpecs(SpekTestEngine.kt:66)
        at org.jetbrains.spek.engine.SpekTestEngine.discover(SpekTestEngine.kt:50)
        at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:130)
        at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:117)
        at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
        at org.junit.platform.launcher.Launcher.execute(Launcher.java:96)
        at org.junit.platform.console.tasks.ConsoleTestExecutor.executeTests(ConsoleTestExecutor.java:65)
        at org.junit.platform.console.tasks.ConsoleTestExecutor.lambda$execute$0(ConsoleTestExecutor.java:57)
        at org.junit.platform.console.tasks.CustomContextClassLoaderExecutor.invoke(CustomContextClassLoaderExecutor.java:33)
        at org.junit.platform.console.tasks.ConsoleTestExecutor.execute(ConsoleTestExecutor.java:57)
        at org.junit.platform.console.ConsoleLauncher.executeTests(ConsoleLauncher.java:85)
        at org.junit.platform.console.ConsoleLauncher.execute(ConsoleLauncher.java:75)
        at org.junit.platform.console.ConsoleLauncher.execute(ConsoleLauncher.java:48)
        at org.junit.platform.console.ConsoleLauncher.main(ConsoleLauncher.java:40)

      

        
        
        
      

    

And here is my current build.gradle:

buildscript {

repositories {
    jcenter()
    maven { url "https://plugins.gradle.org/m2/" }
}
dependencies {
    classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.0-M5'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$project.ext.kotlinVersion"
}
}

apply plugin: 'org.junit.platform.gradle.plugin'
apply plugin: 'idea'
apply plugin: 'kotlin'
apply plugin: 'java'

junitPlatform {
    filters {
        engines {
            include 'spek', 'junit-jupiter', 'junit-vintage'
        }
    }
}

dependencies {
    compile("org.jetbrains.kotlin:kotlin-stdlib-jre8:$project.ext.kotlinVersion")


//    testCompile 'junit:junit:4.12'
    testCompile 'org.jetbrains.spek:spek-api:1.1.2'
    testRuntime 'org.jetbrains.spek:spek-junit-platform-engine:1.1.2'
    testCompile 'org.junit.platform:junit-platform-runner:1.0.0-M5'
    testCompile 'org.junit.jupiter:junit-jupiter-api:5.0.0-M5'
    testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
    testRuntime "org.junit.vintage:junit-vintage-engine:4.12.0-M5"
    testRuntime "org.junit.jupiter:junit-jupiter-engine:5.0.0-M5"
    testRuntime "org.junit.platform:junit-platform-console:1.0.0-M5"

    testCompile "com.google.code.gson:gson:$project.ext.gsonVersion"
}

repositories {
    mavenCentral()
}