Eclipse GWT Junit Error: java.lang.NoSuchMethodError: org.mortbay.thread.Timeout

If you see below errors while running GWT unit test, then change the sequence of libraries. Right click on the project in Eclipse. Navigate to Build path --> Configure Build path --> Order and Export. Change the sequence to GWT then Appengine.
Error is below: java.lang.NoSuchMethodError: org.mortbay.thread.Timeout.(Ljava/lang/Object;)V at org.mortbay.io.nio.SelectorManager$SelectSet.(SelectorManager.java:306) at org.mortbay.io.nio.SelectorManager.doStart(SelectorManager.java:223) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) at org.mortbay.jetty.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:303) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) at org.mortbay.jetty.Server.doStart(Server.java:233) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39) at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:542) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:431) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1053) at com.google.gwt.junit.JUnitShell.getUnitTestShell(JUnitShell.java:680) at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:625) at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:456) at junit.framework.TestCase.runBare(TestCase.java:134) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:311) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at