Is it possible to postpone the initialization of the test subject until the test case with EasyMock?

Is it possible to initialize the object to test not on declaration but in each test case? I can't initialize the object on declaration because the parameters passed to the constructor are part of the test cases. I would need something as:

  @TestSubject
  private ClassUnderTest classUnderTest;

  @Mock
  private Collaborator mock;

  @Test
  public void test12() {
    classUnderTest = new ClassUnderTest(1, 2);
    replay(mock);
    Integer result = classUnderTest.work(3, 4);
    // Assertions
  }

But if I do the above, Easymock complains:

java.lang.NullPointerException: Have you forgotten to instantiate classUnderTest?

I've taken a look at MockBuilder, but I don't see how it can help in this case.