System.getProperty("kotlinDslTestsExtraRepo")?.let(::File)
        ).map(File::normalisedPath)

    @Before
    fun useRepositoryMirrors() {
        executer.withRepositoryMirrors()
    }

    protected
    open val defaultSettingsScript
        get() = ""

    protected
    val repositoriesBlock
        get() = """
            repositories {

     * Note this doesn't work for buildSrc and composite build.
     *
     * @see org.gradle.integtests.fixtures.RepoScriptBlockUtil
     */
    GradleExecuter withRepositoryMirrors();

    /**
     * Requires an isolated gradle user home and put an init script which replaces all external repositories with inner mirrors.
     * This works for all scenarios.
     *