Bug 41798 New JUnit Plug-in test requires test suites to extend Test
The new JUnit plug-in test seems to require test suites to extend TestSuite. Otherwise an error is reported in the launch config dialog. It is however still possible to launch a test suite by opening it in the editor and choosing Run->Run As->New JUnit Plug-in Test To reproduce, try to run (and configure) the JDT UI AllAllTests testsuite.
org.eclipse.jdt.junit/src/org/eclipse/jdt/internal/junit/launcher/JUnitMainTab.java
protected static Image createImage(String path) {
		try {
			ImageDescriptor id= ImageDescriptor.createFromURL(JUnitPlugin.makeIconFileURL(path));
			return id.createImage();
		} catch (MalformedURLException e) {
			
		}  
		return null;
	}
	/**
	 * @see ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
	 */
	public void initializeFrom(ILaunchConfiguration config) {
		updateProjectFromConfig(config);
		String containerHandle= ""; 
		try {
			containerHandle = config.getAttribute(JUnitBaseLaunchConfiguration.LAUNCH_CONTAINER_ATTR, ""); 
		} catch (CoreException ce) {			
		}
		
		if (containerHandle.length() > 0)
			updateTestContainerFromConfig(config);
		else
			updateTestTypeFromConfig(config);
		updateKeepRunning(config);
	}
	private void updateKeepRunning(ILaunchConfiguration config) {
		boolean running= false;
		try {
			running= config.getAttribute(JUnitBaseLaunchConfiguration.ATTR_KEEPRUNNING, false);