Las pruebas Robolectric fallan cuando se ejecutan en CLI

Las pruebas están funcionando bien en Android Studio, pero no cuando las ejecuto en CLI con Gradle. Estoy adivinando algo con el classpath. Aquí está el stacktrace. ¿Algunas ideas?

Tengo los mismos resultados con robolectric 3.3.2 o 3.4-rc1 y 3.4-rc1

java.lang.RuntimeException: java.lang.NullPointerException at org.robolectric.res.ResourceTableFactory.parseResourceFiles (ResourceTableFactory.java:155) at org.robolectric.res.ResourceTableFactory.newResourceTable (ResourceTableFactory.java:43) at org.robolectric.res.ResourceMerger.buildResourceTable (ResourceMerger.java:22) at org.robolectric.RobolectricTestRunner.getAppResourceTable (RobolectricTestRunner.java:450) at org.robolectric.RobolectricTestRunner.beforeTest (RobolectricTestRunner.java:288) at org.robolectric.internal.SandboxTestRunner$2.evaluate (SandboxTestRunner.java:203) at org.robolectric.internal.SandboxTestRunner.runChild (SandboxTestRunner.java:109) at org.robolectric.internal.SandboxTestRunner.runChild (SandboxTestRunner.java:36) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.robolectric.internal.SandboxTestRunner$1.evaluate (SandboxTestRunner.java:63) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter .runTestClass(JUnitTestClassExecuter.java:114) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter .execute(JUnitTestClassExecuter.java:57) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor .processTestClass(JUnitTestClassProcessor.java:66) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor .processTestClass(SuiteTestClassProcessor.java:51) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch (ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch (ReflectionDispatch.java:24) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch (ContextClassLoaderDispatch.java:32) at org.gradle.internal.dispatch.ProxyDispatchAdapter $DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93) at com.sun.proxy.$Proxy1.processTestClass(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker .processTestClass(TestWorker.java:109) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch (ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch (ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub .MessageHubBackedObjectConnection $DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:146) at org.gradle.internal.remote.internal.hub. MessageHubBackedObjectConnection$DispatchWrapper.dispatch (MessageHubBackedObjectConnection.java:128) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run (MessageHub.java:404) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures .onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run (StoppableExecutorImpl.java:46) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:617) at org.gradle.internal.concurrent.ThreadFactoryImpl $ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NullPointerException at org.robolectric.res.DocumentLoader.loadFile(DocumentLoader.java:35) at org.robolectric.res.DocumentLoader.load(DocumentLoader.java:26) at org.robolectric.res.ResourceTableFactory.parseResourceFiles (ResourceTableFactory.java:140) ... 41 more 

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