@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { .... })
// order of test methods is important!
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class MyTest {
  static {
    System.setProperty("myprop", "myvalue");
  }

  /**
   * Fake test that forces spring to reload context before real tests.
   */
  @Test
  @DirtiesContext
  public void aaReloadContext() {

  }

  /**
   * Fake test that clears system property after tests.
   */
  @Test
  public void zzClearProperty() {

    System.clearProperty("myprop");
  }

  ... real test methods...