diff --git a/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/PatientServiceTest.java b/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/PatientServiceTest.java
new file mode 100644
index 0000000..7479144
--- /dev/null
+++ b/src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/PatientServiceTest.java
@@ -0,0 +1,93 @@
+package com.mirna.hospitalmanagementapi.unit.application.service;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+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.TestInstance.Lifecycle;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+
+import com.mirna.hospitalmanagementapi.HospitalManagementApiApplication;
+import com.mirna.hospitalmanagementapi.application.services.PatientServiceImpl;
+import com.mirna.hospitalmanagementapi.domain.dtos.AddressDTO;
+import com.mirna.hospitalmanagementapi.domain.dtos.patient.PatientDTO;
+import com.mirna.hospitalmanagementapi.domain.entities.Patient;
+import com.mirna.hospitalmanagementapi.domain.repositories.PatientRepository;
+
+import jakarta.validation.ConstraintViolationException;
+
+/**
+* 
+* @author Mirna Gama
+* @version 1.0
+*/
+@SpringBootTest(classes = HospitalManagementApiApplication.class)
+@TestInstance(Lifecycle.PER_CLASS)
+@ActiveProfiles("test")
+public class PatientServiceTest {
+
+	@Autowired
+	private PatientServiceImpl patientService;
+	
+	@Autowired
+	private PatientRepository patientRepository;
+	
+	private Patient testPatient;
+	
+	@BeforeAll
+	public void init() {
+		PatientDTO patientDTO = new PatientDTO("test", "test@gmail.com", "11111111111", "99999999",
+				new AddressDTO("TEST STREET", "NEIGHBORHOOD", "12345678", "CITY", "ST", null, null));
+		
+		testPatient = patientRepository.save(new Patient(patientDTO));
+	}
+	
+	@AfterAll
+	public void terminate() {
+		patientRepository.deleteAll();
+	}
+	/**
+	 * Create a valid patient.
+	 */
+	@Test
+	@DisplayName("Should add valid patient")
+	public void testAddValidPatient() throws Exception {
+		PatientDTO patientDTO = new PatientDTO("test1", "test1@gmail.com", "10111111111", "99999999",
+				new AddressDTO("TEST STREET", "NEIGHBORHOOD", "12345678", "CITY", "ST", null, null));
+		
+		Patient patient = patientService.addPatient(patientDTO);
+		
+		assertNotNull(patient.getId());
+	}
+	
+	/**
+	 * Avoid creating a patient with invalid parameter. Example: name being blank
+	 */
+	@Test
+	@DisplayName("Should not add patient with invalid parameter")
+	public void testAddInvalidPatient() throws Exception {
+		PatientDTO patientDTO = new PatientDTO("", "test2@gmail.com", "10111111112", "99999999",
+				new AddressDTO("TEST STREET", "NEIGHBORHOOD", "12345678", "CITY", "ST", null, null));
+		
+		assertThrows(ConstraintViolationException.class, () ->  patientService.addPatient(patientDTO));
+	}
+	
+	/**
+	 * Finds a patient by provided id.
+	 */
+	@Test
+	@DisplayName("Should find patient by id")
+	public void testFindPatientById() throws Exception {
+		
+		Patient patient = patientService.findPatientById(testPatient.getId());
+
+		assertNotNull(patient);
+		
+	}
+}