*/
    public void setForkEvery(long forkEvery) {
        if (forkEvery < 0) {
            throw new IllegalArgumentException("Cannot set forkEvery to a value less than 0.");
        }
        this.forkEvery = forkEvery;
    }

    /**
     * Sets the maximum number of test classes to execute in a forked test process.
     * <p>

        buildFile << """
            tasks.withType(Test).configureEach {
                forkEvery = null
            }
        """

        when:
        executer.expectDocumentedDeprecationWarning("Setting Test.forkEvery to null. This behavior has been deprecated. " +
            "This will fail with an error in Gradle 9.0. Set Test.forkEvery to 0 instead. " +

        verify(mode)

        where:
        mode << modes
    }

    def "produces JUnit xml results with aggressive forking - #mode.name"() {
        when:
        runWithTestConfig("useTestNG(); forkEvery 1; $mode.config")

        then:
        verify(mode)

        where:
        mode << modes
    }

    void verify(Mode mode) {

            ${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]"]