diff --git a/second-part/hw-03/user-service/pom.xml b/second-part/hw-03/user-service/pom.xml
index 4597166..3c6440e 100644
--- a/second-part/hw-03/user-service/pom.xml
+++ b/second-part/hw-03/user-service/pom.xml
@@ -72,13 +72,13 @@
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>junit-jupiter</artifactId>
-      <version>1.20.3</version>
+      <version>1.21.4</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>postgresql</artifactId>
-      <version>1.20.3</version>
+      <version>1.21.4</version>
       <scope>test</scope>
     </dependency>
 
diff --git a/second-part/hw-03/user-service/src/test/java/com/example/UserDaoIntegrationTest.java b/second-part/hw-03/user-service/src/test/java/com/example/UserDaoIntegrationTest.java
new file mode 100644
index 0000000..a314282
--- /dev/null
+++ b/second-part/hw-03/user-service/src/test/java/com/example/UserDaoIntegrationTest.java
@@ -0,0 +1,120 @@
+package com.example;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.util.Properties;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.cfg.Configuration;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.PostgreSQLContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+@Testcontainers
+class UserDaoIntegrationTest {
+
+  @Container
+  static final PostgreSQLContainer<?> POSTGRES =
+      new PostgreSQLContainer<>("postgres:16-alpine")
+          .withDatabaseName("user_service_test")
+          .withUsername("postgres")
+          .withPassword("postgres");
+
+  private static SessionFactory sessionFactory;
+  private UserDao userDao;
+
+  @BeforeAll
+  static void setUpSessionFactory() {
+    Properties properties = new Properties();
+    properties.put("hibernate.connection.driver_class", "org.postgresql.Driver");
+    properties.put("hibernate.connection.url", POSTGRES.getJdbcUrl());
+    properties.put("hibernate.connection.username", POSTGRES.getUsername());
+    properties.put("hibernate.connection.password", POSTGRES.getPassword());
+    properties.put("hibernate.hbm2ddl.auto", "create-drop");
+    properties.put("hibernate.show_sql", "false");
+
+    sessionFactory =
+        new Configuration()
+            .addProperties(properties)
+            .addAnnotatedClass(User.class)
+            .buildSessionFactory();
+  }
+
+  @AfterAll
+  static void tearDownSessionFactory() {
+    if (sessionFactory != null) {
+      sessionFactory.close();
+    }
+  }
+
+  @BeforeEach
+  void cleanDatabase() {
+    try (Session session = sessionFactory.openSession()) {
+      Transaction transaction = session.beginTransaction();
+      session.createMutationQuery("delete from User").executeUpdate();
+      transaction.commit();
+    }
+
+    userDao = new UserDao(sessionFactory);
+  }
+
+  @Test
+  void createPersistsUser() {
+    User user = new User("user1", "user1@example.com", 30);
+
+    User result = userDao.create(user);
+
+    assertNotNull(result.getId());
+    assertNotNull(result.getCreatedAt());
+
+    User persisted = userDao.findById(result.getId());
+    assertNotNull(persisted);
+    assertEquals("user1", persisted.getName());
+    assertEquals("user1@example.com", persisted.getEmail());
+    assertEquals(30, persisted.getAge());
+  }
+
+  @Test
+  void findByIdReturnsUser() {
+    User user = userDao.create(new User("user2", "user2@example.com", 25));
+
+    User result = userDao.findById(user.getId());
+
+    assertNotNull(result);
+    assertEquals(user.getId(), result.getId());
+    assertEquals("user2", result.getName());
+  }
+
+  @Test
+  void updateChangesPersistedUser() {
+    User user = userDao.create(new User("user3", "user3@example.com", 28));
+    user.setName("user3 Updated");
+    user.setEmail("user3.updated@example.com");
+    user.setAge(29);
+
+    User result = userDao.update(user);
+
+    assertNotNull(result);
+    User updated = userDao.findById(user.getId());
+    assertNotNull(updated);
+    assertEquals("user3 Updated", updated.getName());
+    assertEquals("user3.updated@example.com", updated.getEmail());
+    assertEquals(29, updated.getAge());
+  }
+
+  @Test
+  void deleteByIdRemovesUser() {
+    User user = userDao.create(new User("user3", "user3@example.com", 40));
+
+    userDao.deleteById(user.getId());
+
+    assertNull(userDao.findById(user.getId()));
+  }
+}