TestSpec

TestLauncher testLauncher = projectConnection.newTestLauncher();
testLauncher.withTestsFor(specs -> {
    specs.forTaskPath(":test")                                    // configure the test selection on the ':test' task
         .includePackage("org.pkg")                               // execute all tests declared the org.pkg package and its sub-packages
         .includeClass("com.MyTest")                              // execute the MyTest test class
         .includeMethod("com.OtherTest", Arrays.asList("verify")) // execute the OtherTest.verify() test method
         .includePattern("io.*")                                  // execute all tests matching to io.*
}).run();