diff --git a/user-service-api/src/test/java/br/com/rayankonecny/userserviceapi/service/UserServiceTest.java b/user-service-api/src/test/java/br/com/rayankonecny/userserviceapi/service/UserServiceTest.java
index a8ad260..de80ad7 100644
--- a/user-service-api/src/test/java/br/com/rayankonecny/userserviceapi/service/UserServiceTest.java
+++ b/user-service-api/src/test/java/br/com/rayankonecny/userserviceapi/service/UserServiceTest.java
@@ -11,6 +11,7 @@ import org.mockito.InjectMocks;
 import org.mockito.Mock;
 
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import br.com.rayankonecny.userserviceapi.entity.User;
 import br.com.rayankonecny.userserviceapi.mapper.UserMapper;
@@ -105,4 +106,27 @@ public class UserServiceTest {
     verify(repository).findByEmail(request.email());
 
   }
+
+  @Test
+  void whenCallSaveWithInvalidEmailThenThrowDataIntegrityViolationException() {
+
+    final var request = generateMock(CreateUserRequest.class);
+    final var entity  = generateMock(User.class);
+
+    when(repository.findByEmail(anyString())).thenReturn(Optional.of(entity));
+
+    try {
+      service.save(request);
+    } catch (Exception ex) {
+      assertEquals(DataIntegrityViolationException.class, ex.getClass());
+      assertEquals("Email [" + request.email() + "] already exists", ex.getMessage());
+    }
+
+    verify(repository).findByEmail(request.email());
+    verify(mapper, times(0)).fromRequest(any());
+    verify(encoder, times(0)).encode(anyString());
+    verify(repository, times(0)).save(any(User.class));
+
+  }
+
 }