diff --git a/src/thumbnail/thumbnail.controller.spec.ts b/src/thumbnail/thumbnail.controller.spec.ts
index a1b01ef..03b5014 100644
--- a/src/thumbnail/thumbnail.controller.spec.ts
+++ b/src/thumbnail/thumbnail.controller.spec.ts
@@ -1,6 +1,8 @@
 import { Test, TestingModule } from "@nestjs/testing";
 
 import { ThumbnailController } from "@thumbnail/thumbnail.controller";
+import { ThumbnailService } from "@thumbnail/thumbnail.service";
+import { AttachmentService } from "@attachment/attachment.service";
 
 describe("ThumbnailController", () => {
     let controller: ThumbnailController;
@@ -8,6 +10,10 @@ describe("ThumbnailController", () => {
     beforeEach(async () => {
         const module: TestingModule = await Test.createTestingModule({
             controllers: [ThumbnailController],
+            providers: [
+                { provide: ThumbnailService, useValue: {} },
+                { provide: AttachmentService, useValue: {} },
+            ],
         }).compile();
 
         controller = module.get<ThumbnailController>(ThumbnailController);
diff --git a/src/thumbnail/thumbnail.controller.ts b/src/thumbnail/thumbnail.controller.ts
index fcdb226..e054a55 100644
--- a/src/thumbnail/thumbnail.controller.ts
+++ b/src/thumbnail/thumbnail.controller.ts
@@ -1,10 +1,10 @@
+import path from "path";
 import type { Response } from "express";
 
 import { Controller, Get, Inject, Param, Res } from "@nestjs/common";
 
 import { ThumbnailService } from "@thumbnail/thumbnail.service";
 import { AttachmentService } from "@attachment/attachment.service";
-import path from "path";
 
 @Controller("thumbnails")
 export class ThumbnailController {
diff --git a/src/thumbnail/thumbnail.service.spec.ts b/src/thumbnail/thumbnail.service.spec.ts
index 576e9a5..4d4b714 100644
--- a/src/thumbnail/thumbnail.service.spec.ts
+++ b/src/thumbnail/thumbnail.service.spec.ts
@@ -1,12 +1,25 @@
+import { getRepositoryToken } from "@nestjs/typeorm";
 import { Test, TestingModule } from "@nestjs/testing";
-import { ThumbnailService } from "./thumbnail.service";
+
+import { CONFIG_DATA } from "@config/config.module";
+import { Thumbnail } from "@thumbnail/models/thumbnail.model";
+import { ThumbnailService } from "@thumbnail/thumbnail.service";
+import { StorageService } from "@storage/storage.service";
+
+import { configMockFactory } from "../../test/config.mock";
+import { repositoryMockFactory } from "../../test/repository.mock";
 
 describe("ThumbnailService", () => {
     let service: ThumbnailService;
 
     beforeEach(async () => {
         const module: TestingModule = await Test.createTestingModule({
-            providers: [ThumbnailService],
+            providers: [
+                ThumbnailService,
+                { provide: CONFIG_DATA, useFactory: configMockFactory },
+                { provide: getRepositoryToken(Thumbnail), useFactory: repositoryMockFactory },
+                { provide: StorageService, useValue: {} },
+            ],
         }).compile();
 
         service = module.get<ThumbnailService>(ThumbnailService);