Using PowerMock and Robolectric - IncompatibleClassChangeError

I'm trying to use PowerMockito to mock some static methods in Android Robolectric tests. I'm using JUnit 4.8.2, Robolectric 2.2, Mockito 1.9.5, and PowerMock 1.9.5 as directed here. As I have to use the RoboElectricTestRunner, I'm attempting to use the PowerMockRule to bootstrap PowerMock. However I'm getting an unfortunate java.lang.IncompatibleClassChangeError when the test with PowerMock runs.

java.lang.reflect.InvocationTargetException
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 sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323) at sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain(InstrumentationImpl.java:348)

Caused by: java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)

If I put org.ow2.asm after the org.powermock libraries I get:

java.lang.IncompatibleClassChangeError: class org.objectweb.asm.tree.ClassNode has interface org.objectweb.asm.ClassVisitor as super class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method)

on every unit test.

According to Maven depency:tree Robolectric and PowerMock don't share any dependencies. But apparently org.powermock:powermock-module-javaagent packages some org/objectweb/asm classes, and Robolectric relies on org.ow2.asm:asm:jar:4.1 causing a conflict.

@RunWith(RobolectricTestRunner.class)
@PrepareForTest(Helper.class)
@PowerMockIgnore({"com.sun.jmx.*", "javax.management.*"})
public class HelpFragTest {

    @Rule
    public PowerMockRule rule = new PowerMockRule();

    static {
        PowerMockAgent.initializeIfNeeded();
    }

    FragmentActivity fragmentActivity;
    FragmentManager fragmentManager;
    ActionBarManager actionBarManager;

    @Before
    public void setup(){
        actionBarManager = mock(ActionBarManager.class);
        LowesApplication.instance().setActionBarManager(actionBarManager);
        fragmentActivity = Robolectric.buildActivity(FragmentActivity.class).create().start().resume().get();
        fragmentManager = fragmentActivity.getSupportFragmentManager();
    }

    @Test
    public void testShow(){
        mockStatic(Helper.class);

        HelpFrag helpFrag = HelpFrag.newInstance();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        fragmentTransaction.add(helpFrag, null);
        fragmentTransaction.commit();

        assertTrue(helpFrag.isVisible());
    }
}