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
} else {
			fTestMethodLabel.setText(""); 
		}
		
	}
	protected void updateTestContainerFromConfig(ILaunchConfiguration config) {
		String containerHandle= ""; 
		try {
			containerHandle = config.getAttribute(JUnitBaseLaunchConfiguration.LAUNCH_CONTAINER_ATTR, ""); 
			if (containerHandle.length() > 0) {
				fContainerElement= JavaCore.create(containerHandle);
			}
		} catch (CoreException ce) {			
		}
		fTestContainerRadioButton.setSelection(true);
		setEnableSingleTestGroup(false);
		setEnableContainerTestGroup(true);				
		fTestRadioButton.setSelection(false);
		if (fContainerElement != null)
			fContainerText.setText(getPresentationName(fContainerElement));
		fTestText.setText(""); 
	}
	/**
	 * @see ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
	 */
	public void performApply(ILaunchConfigurationWorkingCopy config) {
		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
		if (fTestContainerRadioButton.getSelection() && fContainerElement != null) {
			config.setAttribute(JUnitBaseLaunchConfiguration.LAUNCH_CONTAINER_ATTR, fContainerElement.getHandleIdentifier());