diff --git a/core/src/test/java/cz/muni/fi/pa165/core/company/CompanyControllerTest.java b/core/src/test/java/cz/muni/fi/pa165/core/company/CompanyControllerTest.java
deleted file mode 100644
index 8f6197e5af73445ea337d33bf16516855dbc4141..0000000000000000000000000000000000000000
--- a/core/src/test/java/cz/muni/fi/pa165/core/company/CompanyControllerTest.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package cz.muni.fi.pa165.core.company;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
-import org.springframework.test.web.servlet.MockMvc;
-
-@WebMvcTest(controllers = CompanyController.class)
-public class CompanyControllerTest {
-    @Autowired
-    private MockMvc mockMvc;
-    private static String company = "/api/company";
-}
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/company/UnitTestCompanyJPA.java b/core/src/test/java/cz/muni/fi/pa165/core/company/UnitTestCompanyJPA.java
new file mode 100644
index 0000000000000000000000000000000000000000..247af80a49110f0d675304482527a640f9384d38
--- /dev/null
+++ b/core/src/test/java/cz/muni/fi/pa165/core/company/UnitTestCompanyJPA.java
@@ -0,0 +1,134 @@
+package cz.muni.fi.pa165.core.company;
+
+import cz.muni.fi.pa165.core.house.HouseRepository;
+import cz.muni.fi.pa165.core.smartmeter.SmartMeterRepository;
+import cz.muni.fi.pa165.core.user.UserRepository;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.regex.Pattern;
+
+import static org.assertj.core.api.Assertions.assertThat;
+@RunWith(SpringRunner.class)
+@DataJpaTest
+public class UnitTestCompanyJPA {
+    @Autowired
+    private TestEntityManager entityManager;
+    @Autowired
+    private CompanyRepository companyRepository;
+    @Autowired
+    private HouseRepository houseRepository;
+    @Autowired
+    private SmartMeterRepository smartMeterRepository;
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    public void createCompanyTesting() throws Exception {
+        String company = this.entityManager.persistAndGetId(new Company()).toString();
+        // Regular expression to match UUID format
+        Pattern uuidPattern = Pattern.compile(
+                "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}",
+                Pattern.CASE_INSENSITIVE);
+        // Check if the string matches the UUID format
+        boolean isUUID = uuidPattern.matcher(company).matches();
+        assertThat(isUUID).isTrue();
+    }
+
+    @Test
+    public void shouldFindNoneIfRepositoryIsEmpty() {
+        Iterable<Company> companies = companyRepository.findAll();
+        assertThat(companies).isEmpty();
+    }
+
+    private Company helperRegister() {
+        return companyRepository.save(new Company("Tesla"));
+    }
+
+    @Test
+    public void shouldStore() {
+        Company company = helperRegister();
+
+        assertThat(company).hasFieldOrPropertyWithValue("name", "Tesla");
+    }
+
+    @Test
+    public void shouldFindAll() {
+        Company company = new Company();
+        entityManager.persist(company);
+
+        Company company1 = new Company();
+        entityManager.persist(company1);
+
+        Company company2 = new Company();
+        entityManager.persist(company2);
+
+        assertThat(companyRepository.findAll()).hasSize(3).contains(company, company1, company2);
+    }
+
+    @Test
+    public void shouldFindById() {
+        Company company = new Company();
+        entityManager.persist(company);
+
+        Company company1 = new Company();
+        entityManager.persist(company1);
+
+        Company company2 = new Company();
+        entityManager.persist(company2);
+
+        Company found = companyRepository.findById(company2.getId()).get();
+
+        assertThat(found).isEqualTo(company2);
+
+        found = companyRepository.findById(company1.getId()).get();
+
+        assertThat(found).isEqualTo(company1);
+    }
+
+    @Test
+    public void shouldUpdateById() {
+        Company company = new Company();
+        entityManager.persist(company);
+
+        Company company1 = new Company();
+        entityManager.persist(company1);
+
+        Company updateCompany = companyRepository.findById(company1.getId()).get();
+        updateCompany.setName("Gorenje");
+        companyRepository.save(updateCompany);
+
+        Company check = companyRepository.findById(company1.getId()).get();
+
+        assertThat(check.getId()).isEqualTo(company1.getId());
+        assertThat(check.getName()).isEqualTo(company1.getName());
+    }
+
+    @Test
+    public void shouldDeleteById() {
+        Company company = new Company();
+        entityManager.persist(company);
+
+        Company company1 = helperRegister();
+        entityManager.persist(company1);
+
+        companyRepository.deleteById(company1.getId());
+
+        assertThat(companyRepository.findAll()).hasSize(1).contains(company);
+        assertThat(companyRepository.findAll()).hasSize(1).doesNotContain(company1);
+    }
+
+    @Test
+    public void shouldDeleteAll() {
+        entityManager.persist(helperRegister());
+        entityManager.persist(helperRegister());
+
+        companyRepository.deleteAll();
+
+        assertThat(companyRepository.findAll()).isEmpty();
+    }
+}
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/device/DeviceControllerTest.java b/core/src/test/java/cz/muni/fi/pa165/core/device/DeviceControllerTest.java
deleted file mode 100644
index e76f5b1e63245be382abf4dfd0a1a99e22855861..0000000000000000000000000000000000000000
--- a/core/src/test/java/cz/muni/fi/pa165/core/device/DeviceControllerTest.java
+++ /dev/null
@@ -1,31 +0,0 @@
-//package cz.muni.fi.pa165.core.device;
-//
-//import cz.muni.fi.pa165.core.house.HouseRepository;
-//import jakarta.activation.DataSource;
-//import jakarta.persistence.EntityManager;
-//import org.junit.Test;
-//import org.junit.jupiter.api.extension.ExtendWith;
-//import org.springframework.beans.factory.annotation.Autowired;
-//import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
-//import org.springframework.jdbc.core.JdbcTemplate;
-//import org.springframework.test.context.junit.jupiter.SpringExtension;
-//
-//import static org.assertj.core.api.FactoryBasedNavigableListAssert.assertThat;
-//
-//@ExtendWith(SpringExtension.class)
-//@DataJpaTest
-//public class DeviceControllerTest {
-//    @Autowired
-//    private DataSource dataSource;
-//    @Autowired private JdbcTemplate jdbcTemplate;
-//    @Autowired private EntityManager entityManager;
-//    @Autowired private DeviceRepository deviceRepository;
-//
-//    @Test
-//    void injectedComponentsAreNotNull(){
-//        assertThat(dataSource).isNotNull();
-//        assertThat(jdbcTemplate).isNotNull();
-//        assertThat(entityManager).isNotNull();
-//        assertThat(deviceRepository).isNotNull();
-//    }
-//}
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/device/UnitTestDeviceJPA.java b/core/src/test/java/cz/muni/fi/pa165/core/device/UnitTestDeviceJPA.java
index ef21f54aa4f469200c7d4cbfa8a11d2e10564ddf..e935bc2bb02e15bed870fdad34849f200e243c30 100644
--- a/core/src/test/java/cz/muni/fi/pa165/core/device/UnitTestDeviceJPA.java
+++ b/core/src/test/java/cz/muni/fi/pa165/core/device/UnitTestDeviceJPA.java
@@ -38,7 +38,6 @@ public class UnitTestDeviceJPA {
 
     @Test
     public void createDeviceTesting() throws Exception {
-        this.entityManager.persist(new Device());
         String device = this.entityManager.persistAndGetId(new Device()).toString();
         // Regular expression to match UUID format
         Pattern uuidPattern = Pattern.compile(
@@ -50,7 +49,7 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_find_no_devices_if_repository_is_empty() {
+    public void shouldFindNoDevicesIfRepositoryIsEmpty() {
         Iterable<Device> devices = deviceRepository.findAll();
         assertThat(devices).isEmpty();
     }
@@ -66,14 +65,14 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_store_a_device() {
+    public void shouldStoreADevice() {
         Device device = helperRegisterDevice();
 
         assertThat(device).hasFieldOrPropertyWithValue("name", "Tesla Smart Meter A134");
     }
 
     @Test
-    public void should_find_all_devices() {
+    public void shouldFindAllDevices() {
         Device device1 = new Device();
         entityManager.persist(device1);
 
@@ -84,7 +83,7 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_find_device_by_id() {
+    public void shouldFindDeviceById() {
         Device device1 = new Device();
         entityManager.persist(device1);
 
@@ -101,7 +100,7 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_update_device_by_id() {
+    public void shouldUpdateDeviceById() {
         Device device1 = new Device();
         entityManager.persist(device1);
 
@@ -123,7 +122,7 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_delete_by_id() {
+    public void shouldDeleteById() {
         Device device1 = new Device();
         entityManager.persist(device1);
 
@@ -139,7 +138,7 @@ public class UnitTestDeviceJPA {
     }
 
     @Test
-    public void should_delete_all() {
+    public void shouldDeleteAll() {
         entityManager.persist(helperRegisterDevice());
         entityManager.persist(helperRegisterDevice());
 
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/house/UnitTestHouseJPA.java b/core/src/test/java/cz/muni/fi/pa165/core/house/UnitTestHouseJPA.java
index 20a6a2a27fe99ca7db37ed691d17884bad701752..c2af8041acf75a57735a47393bf2c6cc1988ade5 100644
--- a/core/src/test/java/cz/muni/fi/pa165/core/house/UnitTestHouseJPA.java
+++ b/core/src/test/java/cz/muni/fi/pa165/core/house/UnitTestHouseJPA.java
@@ -31,7 +31,6 @@ public class UnitTestHouseJPA {
 
     @Test
     public void createHouseTesting() throws Exception {
-        this.entityManager.persist(new House());
         String house = this.entityManager.persistAndGetId(new House()).toString();
         // Regular expression to match UUID format
         Pattern uuidPattern = Pattern.compile(
@@ -43,7 +42,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_find_no_houses_if_repository_is_empty() {
+    public void shouldFindNoHousesIfRepositoryIsEmpty() {
         Iterable<House> houses = houseRepository.findAll();
         assertThat(houses).isEmpty();
     }
@@ -60,7 +59,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_store_a_house() {
+    public void shouldStoreAHouse() {
         House house = helperRegisterHouse();
 
         assertThat(house).hasFieldOrPropertyWithValue("address", "Titova 6");
@@ -70,7 +69,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_find_all_houses() {
+    public void shouldFindAllHouses() {
         House house1 = new House();
         entityManager.persist(house1);
 
@@ -86,7 +85,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_find_house_by_id() {
+    public void shouldFindHouseById() {
         House house1 = new House();
         entityManager.persist(house1);
         House house2 = new House();
@@ -102,7 +101,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_update_house_by_id() {
+    public void shouldUpdateHouseById() {
         House house = new House();
         entityManager.persist(house);
 
@@ -127,7 +126,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_delete_tutorial_by_id() {
+    public void shouldDeleteById() {
         House house = new House();
         entityManager.persist(house);
 
@@ -141,7 +140,7 @@ public class UnitTestHouseJPA {
     }
 
     @Test
-    public void should_delete_all() {
+    public void shouldDeleteAll() {
         entityManager.persist(helperRegisterHouse());
         entityManager.persist(helperRegisterHouse());
 
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/metrics/MetricsControllerTest.java b/core/src/test/java/cz/muni/fi/pa165/core/metrics/MetricsControllerTest.java
deleted file mode 100644
index 7eac79f977bfd10b1453b24f1d518d0d5ed1f532..0000000000000000000000000000000000000000
--- a/core/src/test/java/cz/muni/fi/pa165/core/metrics/MetricsControllerTest.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package cz.muni.fi.pa165.core.metrics;
-
-import cz.muni.fi.pa165.core.house.HouseFacade;
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
-import org.springframework.boot.test.mock.mockito.MockBean;
-import org.springframework.test.web.servlet.MockMvc;
-
-import static org.hamcrest.Matchers.containsString;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-@WebMvcTest(controllers = MetricsController.class)
-public class MetricsControllerTest {
-    @Autowired
-    private MockMvc mockMvc;
-    private static String metrics = "/api/metrics";
-
-    @MockBean
-    private MetricsFacade metricsFacade;
-
-    @Test
-    public void shouldReturnEntranceDataGetAllHouses() throws Exception {
-        this.mockMvc.perform(get(metrics))
-                .andDo(print())
-                .andExpect(status().isOk())
-                .andExpect(content().string(containsString("")));
-    }
-}
diff --git a/core/src/test/java/cz/muni/fi/pa165/core/user/UserControllerTest.java b/core/src/test/java/cz/muni/fi/pa165/core/user/UserControllerTest.java
deleted file mode 100644
index e898e652520dee12f24a88f89cc9b138bf141541..0000000000000000000000000000000000000000
--- a/core/src/test/java/cz/muni/fi/pa165/core/user/UserControllerTest.java
+++ /dev/null
@@ -1,98 +0,0 @@
-package cz.muni.fi.pa165.core.user;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
-import org.springframework.boot.test.mock.mockito.MockBean;
-import org.springframework.test.web.servlet.MockMvc;
-
-import java.util.List;
-
-import static org.hamcrest.Matchers.containsString;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-@WebMvcTest(controllers = UserController.class)
-public class UserControllerTest {
-
-  @Autowired private MockMvc mockMvc;
-
-  @MockBean
-  private UserFacade userFacade;
-  @Autowired private ObjectMapper objectMapper;
-  @MockBean private UserService service;
-
-  private static String pathUser = "/api/user/all";
-  private static String pathSmartMether = "/api/smart-meter";
-  private static String manufacturer = "/api/manufacturer";
-
-  @BeforeEach
-  public void setUp() {
-    List.of(
-            new User()
-                .builder()
-                .firstName("Marek")
-                .lastName("Pavel")
-                .email("marek@gmail.cz")
-                .userType(UserType.NORMAL)
-                .password("adminadmin")
-                .build(),
-            new User()
-                .builder()
-                .firstName("John")
-                .lastName("Doe")
-                .email("john.doe@gmail.com")
-                .userType(UserType.NORMAL)
-                .password("password123")
-                .build(),
-            new User()
-                .builder()
-                .firstName("Jane")
-                .lastName("Doe")
-                .email("jane.doe@gmail.com")
-                .userType(UserType.ADMIN)
-                .password("qwertyuiop")
-                .build())
-        .stream()
-        .forEach(service::create);
-  }
-
-  @AfterEach
-  public void dropData() {
-    service.deleteAllHardDelete();
-  }
-
-  /*@Test
-  void getUserTest() throws Exception {
-    for (User user : service.findAll()) {
-      mockMvc.perform(get("/api/user/" + user.getId())).andExpect(status().isOk());
-
-
-      /*.andExpect(content().json("{\"id\":\"" + user.getId()
-                      + "\",\"username\":\""
-                      + user.getUsername()
-                      + "\",\"email\":\""
-                      + user.getEmail()
-                      + "\",\"firstName\":\""
-                      + user.getFirstName()
-                      + "\",\"lastName\":\""
-                      + user.getLastName()
-                      + "\"}"));
-
-    }
-
-  }*/
-  @Test
-  public void shouldReturnEntranceData() throws Exception {
-    this.mockMvc.perform(get(pathUser))
-            .andDo(print())
-            .andExpect(status().isOk())
-            .andExpect(content().string(containsString(pathUser)));
-  }
-}