options.forkOptions.memoryMaximumSize=compilerMemory
}
tasks.withType(Test) {
    minHeapSize = testRunnerMemory
    maxHeapSize = testRunnerMemory
    maxParallelForks = 4
    forkEvery = testForkEvery
}

<% if (groovyProject) { %>
apply plugin: 'groovy'
dependencies {
    implementation 'org.codehaus:groovy:groovy-all:2.4.15'
}
<% } %>

<% if (scalaProject) { %>

                testImplementation('org.junit.jupiter:junit-jupiter:5.9.2')
                testRuntimeOnly('org.junit.platform:junit-platform-launcher')
            }
            test {
                forkEvery = 42
                filter {
                    includeTestsMatching('*Class')
                    excludeTestsMatching('exclude-pattern')
                }
                useJUnitPlatform {

Accessors for org.gradle.api.tasks.javadoc.Javadoc.destinationDir don't use symmetrical @Nullable
Accessors for org.gradle.api.tasks.javadoc.Javadoc.maxMemory don't use symmetrical @Nullable
Accessors for org.gradle.api.tasks.testing.Test.forkEvery don't use symmetrical @Nullable
Accessors for org.gradle.api.tasks.testing.testng.TestNGOptions.parallel don't use symmetrical @Nullable
Accessors for org.gradle.caching.http.HttpBuildCache.url don't use symmetrical @Nullable

            ${config.useTestNG ? 'useTestNG()' : ''}
            minHeapSize = testRunnerMemory
            maxHeapSize = testRunnerMemory
            maxParallelForks = ${config.maxParallelForks}
            forkEvery = testForkEvery
            jvmArgs '-XX:+HeapDumpOnOutOfMemoryError'
        }

        task dependencyReport(type: DependencyReportTask) {
            outputs.upToDateWhen { false }

        true // test successfully executed with debugger attached
    }

    def "forks only one JVM to debug"() {
        setup:
        buildFile << """
             tasks.withType(Test) {
                  forkEvery = 1
                  maxParallelForks = 2
            }
        """
        jdwpClient.listen()

        when:
        withConnection { connection ->
            connection.newTestLauncher()

            ${mavenCentralRepository()}
            dependencies {
                ${testFrameworkDependencies}
            }
            test {
                ${configureTestFramework}
                forkEvery = 1
            }
        """.stripIndent()

        when:
        executer.withTasks('test').run()

        then:

your tests may take longer than you expect to run. You can increase the
heap size, but garbage collection may slow down your tests.

Alternatively, you can fork a new test VM after a certain number of tests have run with the `forkEvery` setting:

====
include::sample[dir="snippets/performance/parallelTestExecution/kotlin",files="build.gradle.kts[tags=fork-every]"]

`forkEvery` — default: 0 (no maximum)::