SpringBoot test with Tomcat Embedded gets NullPointer in TomcatResources addJar

I'm trying to use the SpringBoot for testing with Selenium. But when trying to inicilizar the application and Start tomcat I get the error:

015-09-12 09:12:19.734 INFO 19825 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2015-09-12 09:12:19.736 INFO 19825 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.23 2015-09-12 09:12:19.889 ERROR 19825 --- [cat-startStop-1] org.apache.catalina.core.ContainerBase : A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/dinoponto]] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:917) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/dinoponto]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 6 common frames omitted Caused by: java.lang.IllegalStateException: java.lang.NullPointerException at org.springframework.boot.context.embedded.tomcat.TomcatResources$Tomcat7Resources.addJar(TomcatResources.java:124) at org.springframework.boot.context.embedded.tomcat.TomcatResources.addClasspathResources(TomcatResources.java:62) at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory$StoreMergedWebXmlListener.onStart(TomcatEmbeddedServletContainerFactory.java:679) at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory$StoreMergedWebXmlListener.lifecycleEvent(TomcatEmbeddedServletContainerFactory.java:670) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5066) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 6 common frames omitted Caused by: java.lang.NullPointerException: null at org.springframework.boot.context.embedded.tomcat.TomcatResources$Tomcat7Resources.addJar(TomcatResources.java:121) ... 13 common frames omitted

Here my code:

@SpringApplicationConfiguration(classes = { SpringConfig.class, SpringSecurityConfig.class })
@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class, DirtiesContextTestExecutionListener.class,
        TransactionalTestExecutionListener.class, DbUnitTestExecutionListener.class })
@TransactionConfiguration
@Listeners({ ScreenshotTestRule.class })
@DbUnitConfiguration(dataSetLoader = DinoDataSetLoader.class)
@WebIntegrationTest("serter.port.0")
public class AbstractSeleniumTest extends AbstractTestNGSpringContextTests {

And my SpringConfig contains:

...
@Bean
    public EmbeddedServletContainerFactory servletContainer () {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
        tomcat.setContextPath("/dinoponto");
        tomcat.setPort(8080);
        tomcat.addContextCustomizers(new TomcatContextCustomizer() {

            public void customize (Context context) {
                context.addWelcomeFile("inicio.html");
            }
        });
        return tomcat;
    }
...