How to reuse method and test in JUnit?

I've tried to avoid duplicate code in JUnit test, but I'm kind of stuck.

This is my first test, for the second one it has exactly the same methods but different service (different input). instead of the TestCaseResourceTest1 I have TestCaseResourceTest2. Now what could be the proper way to test both? I want to have a separate file for test number 2, how should I avoid the duplicate code? (ex. use the beforeFileTest() method)

public class TestCaseResourceTest1 {

    @Mock
    private TestService testService;
    @Mock
    private AreaService areaService;

    private TestCaseService1 testCaseService1; // is changed in test2

    @Before
    public void before() throws Exception{
        testCaseService1 = mock(TestCaseService1.class); // is changed in test2
        MockitoAnnotations.initMocks(this);
        beforeFileTest();
    }

    private void beforeFileTest() throws Exception{
        doReturn(true).when(areaService).chechExists(any(String.class), eq(false));
    }

    @Test
    public void verifyFileExists() throws Exception{
        verifyOtherArea(testCaseService1); // is changed in test2
        doReturn(false).when(areaService).chechExists(any(String.class), eq(false));
    }
}

just lines with comment is changed in test2 are differences.

Tnx