Spring Data JPA not persisting entity

I am using Spring Data Jpa for my persistence layer and facing an issue where the code is able to fetch(read) the records but not inserting the entities to DB. Below is my code.
I don't know what wrong I am doing, please help.

Forgot to paste the Test case. Here it is:
[code=java][@ContextConfiguration(classes = {PersistenceJpaConfig.class, ContextConfig.class})
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class TestJPA {

@Autowired
private UserJpaRepository userJpaRepository;

@Test
@Transactional
public void insertUser() {
User user1 = new User("[email protected]","puspender", false, "12345");
System.out.println("saving user");
assertNotNull(userJpaRepository.save(user1));
}

@Test
@Transactional
public void findAllUsers() {
Iterable<User> users = userJpaRepository.findAll();
for(User user : users) {
System.out.println(user.getName()+"\t"+ user.isLocked());
}
}

}/code] findAllUsers() test is working but insertUser() not working.

By default, Tests are set to Rollback at the end. So I need to annotate my transactional method with @Rollback(false)