Unitils EasyMock and JUnit #Rule from JUnit 4.10 to 4.11 - easymock

Question

I have the Problem that when I use the #RuleAnnotation from JUnit for my TemporaryFolder and want to use Mocks from unitils.easymock at the same time I get an IlleagalStateException in JUnit 4.11, whereas in JUnit 4.10 it still works.
So the following test runs under JUnit 4.10 and throws the IllegalStateException in 4.11:
import java.io.File;
import java.io.IOException;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.unitils.UnitilsJUnit4;
public class MyTest extends UnitilsJUnit4 {
#Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
#Test
public void testSomething() throws IOException {
File newFile = temporaryFolder.newFile();
}
}
Even if I use the Annotation for the Mocking capability instead of extends UnitilsJUnit4 it doesn't work in JUnit 4.11:
#RunWith(UnitilsJUnit4TestClassRunner.class)
public class MyTest {
...
}
The error message when testing this code is:
java.lang.IllegalStateException: the temporary folder has not yet been created
Something new I just additionally found out: In JUnit 4.10 I can also enforce the same error when passing a String in the newFile() call:
File newFile = temporaryFolder.newFile("");
My question:
What is the proper way to make TemporaryFolders or #Rules in general work together with unitils.easymock.annotation.Mocks in JUnit 4.11?
Or is Mocking with the easymock #Mock annotation and #Rules at the same time simply not possible?
Versions:
easymock 3.4
unitils 3.4.3