diff --git a/dictation_server/package-lock.json b/dictation_server/package-lock.json
index fbc48f6..5e9a46e 100644
--- a/dictation_server/package-lock.json
+++ b/dictation_server/package-lock.json
@@ -65,6 +65,7 @@
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@@ -1399,6 +1400,13 @@
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+        "tar": "^6.1.11"
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+      "bin": {
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@@ -2537,6 +2580,45 @@
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+        "semver": "^7.3.5"
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+      "resolved": "https://registry.npmjs.org/@npmcli/move-file/-/move-file-1.1.2.tgz",
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+      "deprecated": "This functionality has been moved to @npmcli/fs",
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@@ -3477,6 +3559,35 @@
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+      "devOptional": true
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+    "node_modules/are-we-there-yet": {
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+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-2.0.0.tgz",
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@@ -4024,6 +4168,82 @@
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+        "ssri": "^8.0.1",
+        "tar": "^6.0.2",
+        "unique-filename": "^1.1.1"
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+      "bin": {
+        "mkdirp": "bin/cmd.js"
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@@ -4133,6 +4353,15 @@
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@@ -4178,6 +4407,16 @@
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@@ -4623,6 +4877,12 @@
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@@ -4648,6 +4908,15 @@
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@@ -4783,6 +5052,27 @@
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@@ -4805,6 +5095,23 @@
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@@ -5717,6 +6024,36 @@
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@@ -8211,6 +9021,18 @@
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@@ -8406,6 +9228,22 @@
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@@ -9054,6 +9913,16 @@
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@@ -9399,6 +10268,47 @@
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@@ -9508,6 +10441,39 @@
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@@ -9775,6 +10741,50 @@
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@@ -10523,6 +11533,26 @@
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diff --git a/dictation_server/package.json b/dictation_server/package.json
index 2d79ef0..b2a5666 100644
--- a/dictation_server/package.json
+++ b/dictation_server/package.json
@@ -84,6 +84,7 @@
     "license-checker": "^25.0.1",
     "prettier": "^2.3.2",
     "source-map-support": "^0.5.20",
+    "sqlite3": "^5.1.6",
     "supertest": "^6.1.3",
     "swagger-ui-express": "^4.5.0",
     "ts-jest": "28.0.1",
diff --git a/dictation_server/src/common/test/modules.ts b/dictation_server/src/common/test/modules.ts
new file mode 100644
index 0000000..bd4df33
--- /dev/null
+++ b/dictation_server/src/common/test/modules.ts
@@ -0,0 +1,89 @@
+import { DataSource } from 'typeorm';
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigModule } from '@nestjs/config';
+import { UserGroupsRepositoryModule } from '../../repositories/user_groups/user_groups.repository.module';
+import { TasksRepositoryModule } from '../../repositories/tasks/tasks.repository.module';
+import { AuthModule } from '../../features/auth/auth.module';
+import { AdB2cModule } from '../../gateways/adb2c/adb2c.module';
+import { AccountsModule } from '../../features/accounts/accounts.module';
+import { UsersModule } from '../../features/users/users.module';
+import { FilesModule } from '../../features/files/files.module';
+import { TasksModule } from '../../features/tasks/tasks.module';
+import { SendGridModule } from '../../features/../gateways/sendgrid/sendgrid.module';
+import { LicensesModule } from '../../features/licenses/licenses.module';
+import { AccountsRepositoryModule } from '../../repositories/accounts/accounts.repository.module';
+import { UsersRepositoryModule } from '../../repositories/users/users.repository.module';
+import { LicensesRepositoryModule } from '../../repositories/licenses/licenses.repository.module';
+import { AudioFilesRepositoryModule } from '../../repositories/audio_files/audio_files.repository.module';
+import { AudioOptionItemsRepositoryModule } from '../../repositories/audio_option_items/audio_option_items.repository.module';
+import { CheckoutPermissionsRepositoryModule } from '../../repositories/checkout_permissions/checkout_permissions.repository.module';
+import { NotificationModule } from '../../features//notification/notification.module';
+import { NotificationhubModule } from '../../gateways/notificationhub/notificationhub.module';
+import { BlobstorageModule } from '../../gateways/blobstorage/blobstorage.module';
+import { AuthGuardsModule } from '../../common/guards/auth/authguards.module';
+import { SortCriteriaRepositoryModule } from '../../repositories/sort_criteria/sort_criteria.repository.module';
+import { AuthService } from '../../features/auth/auth.service';
+import { AccountsService } from '../../features/accounts/accounts.service';
+import { UsersService } from '../../features/users/users.service';
+import { NotificationhubService } from '../../gateways/notificationhub/notificationhub.service';
+import { FilesService } from '../../features/files/files.service';
+import { LicensesService } from '../../features/licenses/licenses.service';
+import { TasksService } from '../../features/tasks/tasks.service';
+
+export const makeTestingModule = async (
+  datasource: DataSource,
+): Promise<TestingModule> => {
+  try {
+    const module: TestingModule = await Test.createTestingModule({
+      imports: [
+        ConfigModule.forRoot({
+          envFilePath: ['.env.local', '.env'],
+          isGlobal: true,
+        }),
+        AuthModule,
+        AdB2cModule,
+        AccountsModule,
+        UsersModule,
+        FilesModule,
+        TasksModule,
+        UsersModule,
+        SendGridModule,
+        LicensesModule,
+        AccountsRepositoryModule,
+        UsersRepositoryModule,
+        LicensesRepositoryModule,
+        AudioFilesRepositoryModule,
+        AudioOptionItemsRepositoryModule,
+        TasksRepositoryModule,
+        CheckoutPermissionsRepositoryModule,
+        UserGroupsRepositoryModule,
+        UserGroupsRepositoryModule,
+        NotificationModule,
+        NotificationhubModule,
+        BlobstorageModule,
+        AuthGuardsModule,
+        SortCriteriaRepositoryModule,
+      ],
+      providers: [
+        AuthService,
+        AccountsService,
+        UsersService,
+        NotificationhubService,
+        FilesService,
+        TasksService,
+        LicensesService,
+      ],
+    })
+      .useMocker(async (token) => {
+        switch (token) {
+          case DataSource:
+            return datasource;
+        }
+      })
+      .compile();
+
+    return module;
+  } catch (e) {
+    console.log(e);
+  }
+};
diff --git a/dictation_server/src/features/tasks/tasks.service.spec.ts b/dictation_server/src/features/tasks/tasks.service.spec.ts
index 3602294..4d4d42e 100644
--- a/dictation_server/src/features/tasks/tasks.service.spec.ts
+++ b/dictation_server/src/features/tasks/tasks.service.spec.ts
@@ -6,8 +6,11 @@ import {
 } from './test/tasks.service.mock';
 import { HttpException, HttpStatus } from '@nestjs/common';
 import { makeErrorResponse } from '../../common/error/makeErrorResponse';
+import { TasksService } from './tasks.service';
+import { DataSource } from 'typeorm';
+import { createAccount, createTask, createUser } from './test/utility';
 import { Adb2cTooManyRequestsError } from '../../gateways/adb2c/adb2c.service';
-import { UserNotFoundError } from '../../repositories/users/errors/types';
+import { makeTestingModule } from '../../common/test/modules';
 import { TasksNotFoundError } from '../../repositories/tasks/errors/types';
 
 describe('TasksService', () => {
@@ -501,6 +504,174 @@ describe('TasksService', () => {
       ),
     );
   });
+
+  describe('DBテスト', () => {
+    let source: DataSource = null;
+    beforeEach(async () => {
+      source = new DataSource({
+        type: 'sqlite',
+        database: ':memory:',
+        logging: false,
+        entities: [__dirname + '/../../**/*.entity{.ts,.js}'],
+        synchronize: true, // trueにすると自動的にmigrationが行われるため注意
+      });
+      return source.initialize();
+    });
+
+    afterEach(async () => {
+      await source.destroy();
+      source = null;
+    });
+
+    it('[Admin] Taskが0件であっても実行できる', async () => {
+      const module = await makeTestingModule(source);
+      const { accountId } = await createAccount(source);
+      const { externalId } = await createUser(
+        source,
+        accountId,
+        'userId',
+        'admin',
+      );
+
+      const service = module.get<TasksService>(TasksService);
+      const accessToken = { userId: externalId, role: 'admin', tier: 5 };
+      const offset = 0;
+      const limit = 20;
+      const status = ['Uploaded,Backup'];
+      const paramName = 'JOB_NUMBER';
+      const direction = 'ASC';
+
+      const { tasks, total } = await service.getTasks(
+        accessToken,
+        offset,
+        limit,
+        status,
+        paramName,
+        direction,
+      );
+      expect(tasks).toEqual([]);
+      expect(total).toEqual(0);
+    });
+    it('[Author] Authorは自分が作成者のTask一覧を取得できる', async () => {
+      const module = await makeTestingModule(source);
+      const { accountId } = await createAccount(source);
+      const { userId } = await createUser(
+        source,
+        accountId,
+        'userId',
+        'author',
+        'MY_AUTHOR_ID',
+      );
+      await createTask(
+        source,
+        accountId,
+        userId,
+        'MY_AUTHOR_ID',
+        '',
+        '01',
+        '00000001',
+        'Uploaded',
+      );
+      await createTask(
+        source,
+        accountId,
+        userId,
+        'MY_AUTHOR_ID',
+        '',
+        '01',
+        '00000002',
+        'Uploaded',
+      );
+
+      const service = module.get<TasksService>(TasksService);
+      const accessToken = { userId: 'userId', role: 'author', tier: 5 };
+      const offset = 0;
+      const limit = 20;
+      const status = ['Uploaded', 'Backup'];
+      const paramName = 'JOB_NUMBER';
+      const direction = 'ASC';
+
+      const { tasks, total } = await service.getTasks(
+        accessToken,
+        offset,
+        limit,
+        status,
+        paramName,
+        direction,
+      );
+
+      expect(total).toEqual(2);
+      {
+        const task = tasks[0];
+        expect(task.jobNumber).toEqual('00000001');
+      }
+      {
+        const task = tasks[1];
+        expect(task.jobNumber).toEqual('00000002');
+      }
+    });
+    it('[Author] Authorは同一アカウントであっても自分以外のAuhtorのTaskは取得できない', async () => {
+      const module = await makeTestingModule(source);
+      const { accountId } = await createAccount(source);
+      const { userId: userId_1 } = await createUser(
+        source,
+        accountId,
+        'userId_1',
+        'author',
+        'AUTHOR_ID_1',
+      );
+      const { userId: userId_2 } = await createUser(
+        source,
+        accountId,
+        'userId_2',
+        'author',
+        'AUTHOR_ID_2',
+      );
+      await createTask(
+        source,
+        accountId,
+        userId_1,
+        'AUTHOR_ID_1',
+        '',
+        '01',
+        '00000001',
+        'Uploaded',
+      );
+
+      await createTask(
+        source,
+        accountId,
+        userId_2,
+        'AUTHOR_ID_2',
+        '',
+        '01',
+        '00000002',
+        'Uploaded',
+      );
+
+      const service = module.get<TasksService>(TasksService);
+      const accessToken = { userId: 'userId_1', role: 'author', tier: 5 };
+      const offset = 0;
+      const limit = 20;
+      const status = ['Uploaded', 'Backup'];
+      const paramName = 'JOB_NUMBER';
+      const direction = 'ASC';
+
+      const { tasks, total } = await service.getTasks(
+        accessToken,
+        offset,
+        limit,
+        status,
+        paramName,
+        direction,
+      );
+      expect(total).toEqual(1);
+      {
+        const task = tasks[0];
+        expect(task.jobNumber).toEqual('00000001');
+      }
+    });
+  });
 });
 
 describe('TasksService', () => {
diff --git a/dictation_server/src/features/tasks/test/utility.ts b/dictation_server/src/features/tasks/test/utility.ts
new file mode 100644
index 0000000..b872c69
--- /dev/null
+++ b/dictation_server/src/features/tasks/test/utility.ts
@@ -0,0 +1,89 @@
+import { DataSource } from 'typeorm';
+import { User } from '../../../repositories/users/entity/user.entity';
+import { Account } from '../../../repositories/accounts/entity/account.entity';
+import { Task } from '../../../repositories/tasks/entity/task.entity';
+import { AudioFile } from '../../../repositories/audio_files/entity/audio_file.entity';
+
+export const createAccount = async (
+  datasource: DataSource,
+): Promise<{ accountId: number }> => {
+  const { identifiers } = await datasource.getRepository(Account).insert({
+    tier: 1,
+    country: 'JP',
+    delegation_permission: false,
+    locked: false,
+    company_name: 'test inc.',
+    verified: true,
+    deleted_at: '',
+    created_by: 'test_runner',
+    created_at: new Date(),
+    updated_by: 'updater',
+    updated_at: new Date(),
+  });
+  const account = identifiers.pop() as Account;
+  return { accountId: account.id };
+};
+
+export const createUser = async (
+  datasource: DataSource,
+  accountId: number,
+  external_id: string,
+  role: string,
+  author_id?: string | undefined,
+): Promise<{ userId: number; externalId: string }> => {
+  const { identifiers } = await datasource.getRepository(User).insert({
+    account_id: accountId,
+    external_id: external_id,
+    role: role,
+    accepted_terms_version: '1.0',
+    author_id: author_id,
+    email_verified: true,
+    auto_renew: true,
+    license_alert: true,
+    notification: true,
+    created_by: 'test_runner',
+    created_at: new Date(),
+    updated_by: 'updater',
+    updated_at: new Date(),
+  });
+  const user = identifiers.pop() as User;
+  return { userId: user.id, externalId: external_id };
+};
+
+export const createTask = async (
+  datasource: DataSource,
+  account_id: number,
+  owner_user_id: number,
+  author_id: string,
+  work_type_id: string,
+  priority: string,
+  jobNumber: string,
+  status: string,
+): Promise<void> => {
+  const { identifiers } = await datasource.getRepository(AudioFile).insert({
+    account_id: account_id,
+    owner_user_id: owner_user_id,
+    url: '',
+    file_name: 'x.zip',
+    author_id: author_id,
+    work_type_id: work_type_id,
+    started_at: new Date(),
+    duration: '100000',
+    finished_at: new Date(),
+    uploaded_at: new Date(),
+    file_size: 10000,
+    priority: priority,
+    audio_format: 'audio_format',
+    is_encrypted: true,
+  });
+  const audioFile = identifiers.pop() as AudioFile;
+  await datasource.getRepository(Task).insert({
+    job_number: jobNumber,
+    account_id: account_id,
+    is_job_number_enabled: true,
+    audio_file_id: audioFile.id,
+    status: status,
+    priority: priority,
+    created_at: new Date(),
+  });
+};
diff --git a/dictation_server/src/repositories/accounts/entity/account.entity.ts b/dictation_server/src/repositories/accounts/entity/account.entity.ts
index 88d3626..82d57ea 100644
--- a/dictation_server/src/repositories/accounts/entity/account.entity.ts
+++ b/dictation_server/src/repositories/accounts/entity/account.entity.ts
@@ -40,7 +40,7 @@ export class Account {
   @Column({ nullable: true })
   secondary_admin_user_id?: number;
 
-  @Column('timestamp')
+  @Column({ nullable: true })
   deleted_at?: Date;
 
   @Column()
diff --git a/dictation_server/src/repositories/licenses/entity/license.entity.ts b/dictation_server/src/repositories/licenses/entity/license.entity.ts
index 84de72a..8d676ba 100644
--- a/dictation_server/src/repositories/licenses/entity/license.entity.ts
+++ b/dictation_server/src/repositories/licenses/entity/license.entity.ts
@@ -22,7 +22,7 @@ export class LicenseOrder {
   @CreateDateColumn()
   ordered_at: Date;
 
-  @Column('timestamp', { nullable: true })
+  @Column({ nullable: true })
   issued_at?: Date;
 
   @Column()
@@ -31,7 +31,7 @@ export class LicenseOrder {
   @Column()
   status: string;
 
-  @Column('timestamp', { nullable: true })
+  @Column({ nullable: true })
   canceled_at?: Date;
 }
 
diff --git a/dictation_server/src/repositories/tasks/entity/task.entity.ts b/dictation_server/src/repositories/tasks/entity/task.entity.ts
index c61ad1a..1c13ba6 100644
--- a/dictation_server/src/repositories/tasks/entity/task.entity.ts
+++ b/dictation_server/src/repositories/tasks/entity/task.entity.ts
@@ -34,7 +34,7 @@ export class Task {
   started_at?: Date;
   @Column({ nullable: true })
   finished_at?: Date;
-  @Column({ type: 'timestamp' })
+  @Column({})
   created_at: Date;
   @OneToOne(() => AudioFile, (audiofile) => audiofile.task)
   @JoinColumn({ name: 'audio_file_id' })
diff --git a/dictation_server/src/repositories/users/entity/user.entity.ts b/dictation_server/src/repositories/users/entity/user.entity.ts
index 2f95973..4ee30df 100644
--- a/dictation_server/src/repositories/users/entity/user.entity.ts
+++ b/dictation_server/src/repositories/users/entity/user.entity.ts
@@ -41,7 +41,7 @@ export class User {
   @Column()
   notification: boolean;
 
-  @Column('timestamp', { nullable: true })
+  @Column({ nullable: true })
   deleted_at?: Date;
 
   @Column()