Adding the following code to an existing SEAM project: package org.jboss.seam.example.numberguess.test; import org.jboss.seam.core.Manager; import org.jboss.seam.pageflow.Pageflow; import org.jboss.seam.example.numberguess.NumberGuess; import org.jboss.seam.mock.SeamTest; import org.testng.annotations.Test; public class NumberGuessTest extends SeamTest { private int guess; @Test public void testNumberGuessWin() throws Exception { String id = new NonFacesRequest("/numberGuess.jspx") { @Override protected void renderResponse() throws Exception { NumberGuess ng = (NumberGuess) getInstance(NumberGuess.class); assert ng.getMaxGuesses()==10; assert ng.getBiggest()==100; assert ng.getSmallest()==1; assert ng.getCurrentGuess()==null; assert ng.getGuessCount()==0; assert Manager.instance().isLongRunningConversation(); assert Pageflow.instance().getProcessInstance().getRootToken() .getNode().getName().equals("displayGuess"); } }.run(); } } Click on the import that fails and choose the solution: Add TestNG library. No response. The following messages are written to stdout by eclipse after electing to add the library: Covering node=Test Covering node=org.testng.annotations.Test