diff --git a/backend/build.gradle b/backend/build.gradle
index 6bde929..b7867b9 100644
--- a/backend/build.gradle
+++ b/backend/build.gradle
@@ -16,10 +16,9 @@ repositories {
 }
 
 dependencies {
-	implementation 'org.springframework.boot:spring-boot-starter-web' 
+	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
 	implementation 'org.modelmapper:modelmapper:3.2.0'
-	// implementation 'com.fasterxml.jackson.core:jackson-databind:2.12.5'
 
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
diff --git a/backend/src/test/java/com/example/backend/CategorieServiceTests.java b/backend/src/test/java/com/example/backend/CategorieServiceTests.java
new file mode 100644
index 0000000..2be7e6d
--- /dev/null
+++ b/backend/src/test/java/com/example/backend/CategorieServiceTests.java
@@ -0,0 +1,54 @@
+package com.example.backend;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import com.example.backend.categories.model.CategorieEntity;
+import com.example.backend.categories.service.CategorieService;
+import com.example.backend.core.errors.NotFoundException;
+
+@SpringBootTest
+@TestMethodOrder(OrderAnnotation.class)
+public class CategorieServiceTests {
+
+    @Autowired
+    private CategorieService categorieService;
+
+    @Test
+    void getTest() {
+        Assertions.assertThrows(NotFoundException.class, () -> categorieService.get(0));
+    }
+
+    @Test
+    @Order(1)
+    void createTest() {
+        categorieService.create(new CategorieEntity(1, "Драма", ""));
+        final CategorieEntity lastCategorie = categorieService.create(new CategorieEntity(2, "Хоррор", ""));
+        Assertions.assertEquals(lastCategorie, categorieService.get(2));
+    }
+
+    @Test
+    @Order(2)
+    void update() {
+        final String newName = "Комедия";
+        final CategorieEntity entity = categorieService.get(2);
+        final String oldName = entity.getName();
+        final CategorieEntity newEntity = categorieService.update(2, new CategorieEntity(2, newName, ""));
+        Assertions.assertEquals(newName, newEntity.getName());
+        Assertions.assertNotEquals(oldName, "Аниме");
+
+    }
+
+    @Test
+    @Order(3)
+    void delete() {
+        categorieService.delete(2);
+
+        Assertions.assertNotEquals(2, categorieService.getAll().size());
+    }
+}