diff --git a/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/auth/UserDetailsServiceTest.java b/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/auth/UserDetailsServiceTest.java
new file mode 100644
index 0000000..0f1bfdd
--- /dev/null
+++ b/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/auth/UserDetailsServiceTest.java
@@ -0,0 +1,62 @@
+package com.mirna.hospitalmanagementapi.unit.application.service.auth;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+
+import com.mirna.hospitalmanagementapi.application.services.auth.UserDetailsServiceImpl;
+import com.mirna.hospitalmanagementapi.domain.dtos.auth.UserDTO;
+import com.mirna.hospitalmanagementapi.domain.entities.auth.User;
+import com.mirna.hospitalmanagementapi.domain.repositories.auth.UserRepository;
+
+/**
+ * 
+ * @author Mirna Gama
+ * @version 1.0
+ */
+@SpringBootTest
+@AutoConfigureMockMvc(addFilters = false)
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@TestMethodOrder(OrderAnnotation.class)
+@ActiveProfiles("test")
+public class UserDetailsServiceTest {
+
+	@Autowired
+	private UserDetailsServiceImpl userDetailsService;
+	
+	@Autowired
+	private UserRepository userRepository;
+
+	@BeforeAll
+	public void init() {
+		User user = new User(new UserDTO("test", "password"));
+		userRepository.save(user);
+	}
+	
+	@AfterAll
+	public void terminate() {
+		userRepository.deleteAll();
+	}
+	
+	/**
+	 * Should load user by username successfully
+	 * 
+	 */
+	@Test
+	@DisplayName("Should load user by username")
+	public void testFindUserByLogin() throws Exception {
+		User user = (User) userDetailsService.loadUserByUsername("test");
+		
+		assertNotNull(user);
+	}
+}