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
}
		});
		setButtonGridData(fContainerSearchButton);	
	}
	private void handleContainerSearchButtonSelected() {
		IJavaElement javaElement= chooseContainer(fContainerElement);
		if (javaElement != null) {
			fContainerElement= javaElement;
			fContainerText.setText(getPresentationName(javaElement));
			validatePage();
			updateLaunchConfigurationDialog();
		}
	}
	public void createKeepAliveGroup(Composite comp) {
		GridData gd;
		fKeepRunning = new Button(comp, SWT.CHECK);
		fKeepRunning.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				updateLaunchConfigurationDialog();
			}
			public void widgetDefaultSelected(SelectionEvent e) {
			}
		});
		fKeepRunning.setText(JUnitMessages.getString("JUnitMainTab.label.keeprunning")); 
		gd= new GridData();
		gd.horizontalAlignment= GridData.FILL;
		gd.horizontalSpan= 2;
		fKeepRunning.setLayoutData(gd);
	}