the -S output looks like the following:

Execution failed for task ':test'.
at org.gradle.api.internal.tasks.DefaultTaskExecuter.executeActions(DefaultTaskExecuter.java:63)
at org.gradle.api.internal.tasks.DefaultTaskExecuter.execute(DefaultTaskExecuter.java:41)
at org.gradle.api.internal.project.taskfactory.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:32)
at org.gradle.api.internal.project.taskfactory.ExecutionShortCircuitTaskExecuter.execute(ExecutionShortCircuitTaskExecuter.java:50)
at org.gradle.api.internal.tasks.SkipTaskExecuter.doExecute(SkipTaskExecuter.java:57)
at org.gradle.api.internal.tasks.SkipTaskExecuter.execute(SkipTaskExecuter.java:35)
at org.gradle.api.internal.tasks.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:32)
at org.gradle.api.internal.AbstractTask.execute(AbstractTask.java:231)
at org.gradle.execution.DefaultTaskGraphExecuter.executeTask(DefaultTaskGraphExecuter.java:167)
at org.gradle.execution.DefaultTaskGraphExecuter.doExecute(DefaultTaskGraphExecuter.java:160)
at org.gradle.execution.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:78)
at org.gradle.execution.TaskNameResolvingBuildExecuter.execute(TaskNameResolvingBuildExecuter.java:161)
at org.gradle.execution.DelegatingBuildExecuter.execute(DelegatingBuildExecuter.java:54)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:153)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:107)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:75)
at org.gradle.launcher.Main.execute(Main.java:93)
at org.gradle.launcher.Main.main(Main.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.gradle.launcher.GradleMain.main(GradleMain.java:49)
Caused by: org.gradle.api.GradleException: There were failing tests. See the report at /Users/Rene/workspaces/gradle/test/pwmock/build/reports/tests.
at org.gradle.api.tasks.testing.Test.executeTests(Test.java:331)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:88)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1058)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:886)
at org.gradle.api.internal.BeanDynamicObject.invokeMethod(BeanDynamicObject.java:158)
at org.gradle.api.internal.CompositeDynamicObject.invokeMethod(CompositeDynamicObject.java:93)
at org.gradle.api.tasks.testing.Test_Decorated.invokeMethod(Unknown Source)
at groovy.lang.GroovyObject$invokeMethod.call(Unknown Source)
at org.gradle.util.ReflectionUtil.invoke(ReflectionUtil.groovy:23)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$2.execute(AnnotationProcessingTaskFactory.java:131)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$2.execute(AnnotationProcessingTaskFactory.java:129)
at org.gradle.api.internal.tasks.DefaultTaskExecuter.executeActions(DefaultTaskExecuter.java:55)
... 22 common frames omitted

BUILD FAILED

the output of a running this build from intellij gives more informations:

:clean
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:compileTestJava
:processTestResources
:testClasses
:testExecution for Test process 'Gradle Worker 1' FAILED
org.gradle.api.internal.tasks.testing.TestSuiteExecutionException: Could not execute test class 'acme.FailedTest'.
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:32)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:23)
at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:75)
at $Proxy4.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:32)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:23)
at org.gradle.messaging.remote.internal.MethodInvocationUnmarshallingDispatch.dispatch(MethodInvocationUnmarshallingDispatch.java:48)
at org.gradle.messaging.remote.internal.MethodInvocationUnmarshallingDispatch.dispatch(MethodInvocationUnmarshallingDispatch.java:25)
at org.gradle.messaging.dispatch.DiscardOnFailureDispatch.dispatch(DiscardOnFailureDispatch.java:31)
at org.gradle.messaging.dispatch.AsyncDispatch.dispatchMessages(AsyncDispatch.java:131)
at org.gradle.messaging.dispatch.AsyncDispatch.access$000(AsyncDispatch.java:35)
at org.gradle.messaging.dispatch.AsyncDispatch$1.run(AsyncDispatch.java:71)
at org.gradle.messaging.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:63)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
Caused by: java.lang.IllegalStateException: Failed to transform class with name javax.faces.context.FacesContext. Reason: javax.el.ELContext
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:208)
at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:146)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:63)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:95)
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:107)
at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:31)
at sun.reflect.annotation.AnnotationParser.parseSig(AnnotationParser.java:370)
at sun.reflect.annotation.AnnotationParser.parseClassValue(AnnotationParser.java:351)
at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:653)
at sun.reflect.annotation.AnnotationParser.parseArray(AnnotationParser.java:460)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(AnnotationParser.java:286)
at sun.reflect.annotation.AnnotationParser.parseAnnotation(AnnotationParser.java:222)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:69)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:52)
at java.lang.Class.initAnnotationsIfNecessary(Class.java:3070)
at java.lang.Class.getAnnotations(Class.java:3050)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.classAnnotations(PowerMockJUnit44RunnerDelegateImpl.java:178)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.getDescription(PowerMockJUnit44RunnerDelegateImpl.java:170)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:133)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:112)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:55)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:54)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:63)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:49)
... 26 more
Caused by: org.gradle.messaging.remote.internal.PlaceholderException: javassist.NotFoundException: javax.el.ELContext
at javassist.ClassPool.get(ClassPool.java:436)
at javassist.bytecode.Descriptor.toCtClass(Descriptor.java:591)
at javassist.bytecode.Descriptor.getReturnType(Descriptor.java:488)
at javassist.CtBehavior.getReturnType0(CtBehavior.java:252)
at javassist.CtMethod.getReturnType(CtMethod.java:216)
at org.powermock.core.transformers.impl.MainMockTransformer.modifyMethod(MainMockTransformer.java:136)
at org.powermock.core.transformers.impl.MainMockTransformer.allowMockingOfStaticAndFinalAndNativeMethods(MainMockTransformer.java:111)
at org.powermock.core.transformers.impl.MainMockTransformer.transform(MainMockTransformer.java:62)
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:204)
... 53 more

Total time: 28.873 secs

FAILURE: Build failed with an exception.

• Where:
  Build file '/Users/Rene/workspaces/gradle/test/pwmock/build.gradle'

• What went wrong:
  Execution failed for task ':test'.
  Cause: There were failing tests. See the report at /Users/Rene/workspaces/gradle/test/pwmock/build/reports/tests.

• Try:
  Run with -s or -d option to get more details. Run with -S option to get the full (very verbose) stacktrace.

BUILD FAILED

Process finished with exit code 1

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