diff --git a/node/src/test/java/com/bipbup/utils/AreaUtilTest.java b/node/src/test/java/com/bipbup/utils/AreaUtilTest.java
index f2a3c99..5cdaf7b 100644
--- a/node/src/test/java/com/bipbup/utils/AreaUtilTest.java
+++ b/node/src/test/java/com/bipbup/utils/AreaUtilTest.java
@@ -1,161 +1,160 @@
 package com.bipbup.utils;
 
-import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import java.io.IOException;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
-import java.util.List;
-import java.util.Map;
 import lombok.SneakyThrows;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNull;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
-import static org.mockito.ArgumentMatchers.anyString;
-import static java.net.http.HttpResponse.BodyHandlers.ofString;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+
+import static java.net.http.HttpResponse.BodyHandlers.ofString;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
-import org.mockito.MockitoAnnotations;
 
 class AreaUtilTest {
 
-    @Mock
-    private ObjectMapper objectMapper;
-
-    @Mock
-    private HttpClient client;
-
-    @InjectMocks
-    private AreaUtil areaUtil;
-
-    @BeforeEach
-    void setUp() {
-        MockitoAnnotations.openMocks(this);
-    }
-
-    private HttpResponse<String> mockHttpResponse(int statusCode, String body)
-            throws IOException, InterruptedException {
-        HttpResponse<String> response = mock(HttpResponse.class);
-        when(response.statusCode()).thenReturn(statusCode);
-        when(response.body()).thenReturn(body);
-        when(client.send(any(HttpRequest.class), eq(ofString()))).thenReturn(response);
-        return response;
-    }
-
-    @Test
-    @DisplayName("Should return area ID for valid area name")
-    void testGetAreaIdFromApi_ValidAreaName() throws Exception {
-        // Arrange
-        String areaName = "Moscow";
-        String jsonResponse = "[{\"id\":\"1\", \"name\":\"Moscow\"}]";
-        mockHttpResponse(200, jsonResponse);
-
-        when(objectMapper.readValue(eq(jsonResponse), any(TypeReference.class))).thenReturn(
-                List.of(Map.of("id", "1", "name", "Moscow")));
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(areaName);
-
-        // Assert
-        assertEquals(1, areaId);
-    }
-
-    @Test
-    @DisplayName("Should return null for invalid area name")
-    void testGetAreaIdFromApi_InvalidAreaName() throws Exception {
-        // Arrange
-        String areaName = "Unknown";
-        String jsonResponse = "[{\"id\":\"1\", \"name\":\"Moscow\"}]";
-        mockHttpResponse(200, jsonResponse);
-
-        when(objectMapper.readValue(anyString(), any(TypeReference.class))).thenReturn(
-                List.of(Map.of("id", "1", "name", "Moscow")));
-
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(areaName);
-
-        // Assert
-        assertNull(areaId);
-    }
-
-    @Test
-    @DisplayName("Should return null for empty area list")
-    void testGetAreaIdFromApi_EmptyAreaList() throws Exception {
-        // Arrange
-        String areaName = "Moscow";
-        String jsonResponse = "[]";  // Пустой JSON массив
-        mockHttpResponse(200, jsonResponse);
-
-        when(objectMapper.readValue(anyString(), any(TypeReference.class))).thenReturn(List.of());
-
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(areaName);
-
-        // Assert
-        assertNull(areaId);
-    }
-
-    @SneakyThrows
-    @Test
-    @DisplayName("Should return null for API error response")
-    void testGetAreaIdFromApi_ApiError() {
-        // Arrange
-        String areaName = "Moscow";
-        mockHttpResponse(500, "Internal Server Error");
-
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(areaName);
-
-        // Assert
-        assertNull(areaId);
-    }
-
-    @Test
-    @DisplayName("Should return null for null area name")
-    void testGetAreaIdFromApi_NullAreaName() {
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(null);
-
-        // Assert
-        assertNull(areaId);
-    }
-
-    @Test
-    @DisplayName("Should return null for IOException during API call")
-    void testGetAreaIdFromApi_IOException() throws Exception {
-        // Arrange
-        String areaName = "Moscow";
-        when(client.send(any(HttpRequest.class), eq(HttpResponse.BodyHandlers.ofString()))).thenThrow(
-                new IOException("Network error"));
-
-        // Act
-        assertThrows(IOException.class, () -> areaUtil.getAreaIdFromApi(areaName));
-    }
-
-    @Test
-    @DisplayName("Should return area ID for nested area structure")
-    void testGetAreaIdFromApi_NestedAreas() throws Exception {
-        // Arrange
-        String areaName = "SubMoscow";
-        String jsonResponse =
-                "[{\"id\":\"1\", \"name\":\"Moscow\", \"areas\":[{\"id\":\"2\", \"name\":\"SubMoscow\"}]}]";
-        mockHttpResponse(200, jsonResponse);
-
-        when(objectMapper.readValue(anyString(), any(TypeReference.class))).thenReturn(
-                List.of(Map.of("id", "1", "name", "Moscow", "areas", List.of(Map.of("id", "2", "name", "SubMoscow")))));
-
-        // Act
-        Integer areaId = areaUtil.getAreaIdFromApi(areaName);
-
-        // Assert
-        assertEquals(2, areaId);
-    }
+	ObjectMapper realObjectMapper = new ObjectMapper();
+	@Mock
+	private ObjectMapper objectMapper;
+	@Mock
+	private HttpClient client;
+	@InjectMocks
+	private AreaUtil areaUtil;
+
+	@BeforeEach
+	void setUp() {
+		MockitoAnnotations.openMocks(this);
+	}
+
+	private HttpResponse<String> mockHttpResponse(int statusCode, String body)
+			throws IOException, InterruptedException {
+		HttpResponse<String> response = mock(HttpResponse.class);
+		when(response.statusCode()).thenReturn(statusCode);
+		when(response.body()).thenReturn(body);
+		when(client.send(any(HttpRequest.class), eq(ofString()))).thenReturn(response);
+		return response;
+	}
+
+	@Test
+	@DisplayName("Should return area ID for valid area name")
+	void testGetAreaIdFromApi_ValidAreaName() throws Exception {
+		// Arrange
+		String areaName = "Moscow";
+		String jsonResponse = "[{\"id\":\"1\", \"name\":\"Moscow\"}]";
+		mockHttpResponse(200, jsonResponse);
+
+		JsonNode jsonNode = realObjectMapper.readTree(jsonResponse);
+		when(objectMapper.readTree(jsonResponse)).thenReturn(jsonNode);
+
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(areaName);
+
+		// Assert
+		assertEquals(1, areaId);
+	}
+
+	@Test
+	@DisplayName("Should return null for invalid area name")
+	void testGetAreaIdFromApi_InvalidAreaName() throws Exception {
+		// Arrange
+		String areaName = "Unknown";
+		String jsonResponse = "[{\"id\":\"1\", \"name\":\"Moscow\"}]";
+		var response = mockHttpResponse(200, jsonResponse);
+
+		JsonNode jsonNode = realObjectMapper.readTree(jsonResponse);
+		when(objectMapper.readTree(response.body())).thenReturn(jsonNode);
+
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(areaName);
+
+		// Assert
+		assertNull(areaId);
+	}
+
+	@Test
+	@DisplayName("Should return null for empty area list")
+	void testGetAreaIdFromApi_EmptyAreaList() throws Exception {
+		// Arrange
+		String areaName = "Moscow";
+		String jsonResponse = "[]";  // Пустой JSON массив
+		mockHttpResponse(200, jsonResponse);
+
+		JsonNode jsonNode = realObjectMapper.readTree(jsonResponse);
+		when(objectMapper.readTree(jsonResponse)).thenReturn(jsonNode);
+
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(areaName);
+
+		// Assert
+		assertNull(areaId);
+	}
+
+	@SneakyThrows
+	@Test
+	@DisplayName("Should return null for API error response")
+	void testGetAreaIdFromApi_ApiError() {
+		// Arrange
+		String areaName = "Moscow";
+		mockHttpResponse(500, "Internal Server Error");
+
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(areaName);
+
+		// Assert
+		assertNull(areaId);
+	}
+
+	@Test
+	@DisplayName("Should return null for null area name")
+	void testGetAreaIdFromApi_NullAreaName() {
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(null);
+
+		// Assert
+		assertNull(areaId);
+	}
+
+	@Test
+	@DisplayName("Should return null for IOException during API call")
+	void testGetAreaIdFromApi_IOException() throws Exception {
+		// Arrange
+		String areaName = "Moscow";
+		when(client.send(any(HttpRequest.class), eq(HttpResponse.BodyHandlers.ofString()))).thenThrow(new IOException("Network error"));
+
+		// Act
+		assertThrows(IOException.class, () -> areaUtil.getAreaIdFromApi(areaName));
+	}
+
+	@Test
+	@DisplayName("Should return area ID for nested area structure")
+	void testGetAreaIdFromApi_NestedAreas() throws Exception {
+		// Arrange
+		String areaName = "SubMoscow";
+		String jsonResponse =
+				"[{\"id\":\"1\", \"name\":\"Moscow\", \"areas\":[{\"id\":\"2\", \"name\":\"SubMoscow\"}]}]";
+		mockHttpResponse(200, jsonResponse);
+
+		JsonNode jsonNode = realObjectMapper.readTree(jsonResponse);
+		when(objectMapper.readTree(jsonResponse)).thenReturn(jsonNode);
+
+		// Act
+		Integer areaId = areaUtil.getAreaIdFromApi(areaName);
+
+		// Assert
+		assertEquals(2, areaId);
+	}
 
 }