src/test/java/test/groupinvocation/testng.xml

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name="Groups run" verbose="2">
  <test name="External group invocation">
		<groups>
			<run>
				<include name="a" />
			</run>
		</groups>
		<classes>
			<class name="test.groupinvocation.GroupConfiguration" />
			<class name="test.groupinvocation.DummyTest" />
		</classes>
  </test>
	<test name="Failing External BeforeGroups - Group run">
		<groups>
			<run>
				<include name="A" />
			</run>
		</groups>
		<classes>
			<class name="test.groupinvocation.FailingBeforeGroupMethod" />
			<class name="test.groupinvocation.DummyTest2" />
		</classes>
  </test>
	
	<test name="Failing External BeforeGroups - No group run">
		<classes>
			<class name="test.groupinvocation.FailingBeforeGroupMethod" />
			<class name="test.groupinvocation.DummyTest2" />
		</classes>
  </test>
</suite>