gradle 2.0 multiproject build failing with integrationTest

gistfile1.txt

// settings.gradle
include 'testing'

// testing/build.gradle
// empty.

// build.gradle .. adapted from samples/java/withIntegrationTest
allprojects {
apply plugin: 'java'

repositories {
    mavenCentral()
}

sourceSets {
    integrationTest {
        java { srcDir file('src/integration-test/java') }
        resources { srcDir file('src/integration-test/resources') }
    }
}

dependencies {
    testCompile 'junit:junit:4.11'
    integrationTestCompile 'commons-collections:commons-collections:3.2'
    integrationTestCompile sourceSets.main.output
    integrationTestCompile configurations.testCompile
    integrationTestCompile sourceSets.test.output
    integrationTestRuntime configurations.testRuntime
}

task integrationTest(type: Test, dependsOn: jar) {
    testClassesDir = sourceSets.integrationTest.output.classesDir
    classpath = sourceSets.integrationTest.runtimeClasspath
    systemProperties['jar.path'] = jar.archivePath
}

check.dependsOn integrationTest
}