file('src/main/groovy/MyPlugin.groovy') << customGroovyPlugin()

        file('src/test/groovy/MyTest.groovy') << """
            class MyTest extends groovy.test.GroovyTestCase {

                void testCanUseProjectBuilder() {
                    def project = ${ProjectBuilder.name}.builder().build()
                    project.plugins.apply(MyPlugin)
                    project.plugins.apply(org.gradle.api.plugins.JavaPlugin)

        then:
        succeeds 'test'
    }

    private static String pluginTest() {
        """
            class MyPluginTest extends groovy.test.GroovyTestCase {

                void testCanUseProjectBuilder() {
                    def project = ${ProjectBuilder.name}.builder().build()
                    project.plugins.apply(MyPlugin)
                    project.evaluate()
                }
            }