diff --git a/src/__tests__/box/data/box/BoxBuilder.ts b/src/__tests__/box/data/box/BoxBuilder.ts
new file mode 100644
index 00000000..87d743a6
--- /dev/null
+++ b/src/__tests__/box/data/box/BoxBuilder.ts
@@ -0,0 +1,110 @@
+import {SessionStage} from "../../../../box/enum/SessionStage.enum";
+import {Box} from "../../../../box/schemas/box.schema";
+import {ObjectId} from "mongodb";
+import {Tester} from "../../../../box/schemas/tester.schema";
+import {DailyTask} from "../../../../dailyTasks/dailyTasks.schema";
+
+export default class BoxBuilder {
+    private readonly base: Partial<Box> = {
+        adminPassword: 'defaultAdminPassword',
+        sessionStage: SessionStage.PREPARING,
+        testersSharedPassword: null,
+        boxRemovalTime: Date.now() + 1000000,
+        sessionResetTime: Date.now() + 500000,
+        adminProfile_id: null,
+        adminPlayer_id: null,
+        clan_ids: [],
+        soulHome_ids: [],
+        room_ids: [],
+        stock_ids: [],
+        chat_id: null,
+        testers: [],
+        accountClaimersIds: [],
+        dailyTasks: [],
+        _id: null
+    };
+
+    build(): Box {
+        return { ...this.base } as Box;
+    }
+
+    setAdminPassword(password: string) {
+        this.base.adminPassword = password;
+        return this;
+    }
+
+    setSessionStage(stage: SessionStage) {
+        this.base.sessionStage = stage;
+        return this;
+    }
+
+    setTestersSharedPassword(password: string | null) {
+        this.base.testersSharedPassword = password;
+        return this;
+    }
+
+    setBoxRemovalTime(time: number) {
+        this.base.boxRemovalTime = time;
+        return this;
+    }
+
+    setSessionResetTime(time: number) {
+        this.base.sessionResetTime = time;
+        return this;
+    }
+
+    setAdminProfileId(profileId: ObjectId) {
+        this.base.adminProfile_id = profileId;
+        return this;
+    }
+
+    setAdminPlayerId(playerId: ObjectId) {
+        this.base.adminPlayer_id = playerId;
+        return this;
+    }
+
+    setClanIds(clanIds: ObjectId[]) {
+        this.base.clan_ids = clanIds;
+        return this;
+    }
+
+    setSoulHomeIds(soulHomeIds: ObjectId[]) {
+        this.base.soulHome_ids = soulHomeIds;
+        return this;
+    }
+
+    setRoomIds(roomIds: ObjectId[]) {
+        this.base.room_ids = roomIds;
+        return this;
+    }
+
+    setStockIds(stockIds: ObjectId[]) {
+        this.base.stock_ids = stockIds;
+        return this;
+    }
+
+    setChatId(chatId: ObjectId) {
+        this.base.chat_id = chatId;
+        return this;
+    }
+
+    setTesters(testers: Tester[]) {
+        this.base.testers = testers;
+        return this;
+    }
+
+    setAccountClaimersIds(accountClaimersIds: string[]) {
+        this.base.accountClaimersIds = accountClaimersIds;
+        return this;
+    }
+
+    setDailyTasks(dailyTasks: DailyTask[]) {
+        this.base.dailyTasks = dailyTasks;
+        return this;
+    }
+
+    setId(id: ObjectId) {
+        this.base._id = id;
+        return this;
+    }
+}
diff --git a/src/__tests__/box/data/box/CreateBoxDtoBuilder.ts b/src/__tests__/box/data/box/CreateBoxDtoBuilder.ts
new file mode 100644
index 00000000..4583a82f
--- /dev/null
+++ b/src/__tests__/box/data/box/CreateBoxDtoBuilder.ts
@@ -0,0 +1,105 @@
+import {SessionStage} from "../../../../box/enum/SessionStage.enum";
+import {ObjectId} from "mongodb";
+import {Tester} from "../../../../box/schemas/tester.schema";
+import {DailyTask} from "../../../../dailyTasks/dailyTasks.schema";
+import {CreateBoxDto} from "../../../../box/dto/createBox.dto";
+
+
+export default class CreateBoxDtoBuilder {
+    private readonly base: Partial<CreateBoxDto> = {
+        adminPassword: 'defaultAdminPassword',
+        sessionStage: SessionStage.PREPARING,
+        testersSharedPassword: null,
+        boxRemovalTime: Date.now() + 1000000,
+        sessionResetTime: Date.now() + 500000,
+        adminProfile_id: null,
+        adminPlayer_id: null,
+        clan_ids: [],
+        soulHome_ids: [],
+        room_ids: [],
+        stock_ids: [],
+        chat_id: null,
+        testers: [],
+        accountClaimersIds: [],
+        dailyTasks: [],
+    };
+
+    build(): CreateBoxDto {
+        return { ...this.base } as CreateBoxDto;
+    }
+
+    setAdminPassword(password: string) {
+        this.base.adminPassword = password;
+        return this;
+    }
+
+    setSessionStage(stage: SessionStage) {
+        this.base.sessionStage = stage;
+        return this;
+    }
+
+    setTestersSharedPassword(password: string | null) {
+        this.base.testersSharedPassword = password;
+        return this;
+    }
+
+    setBoxRemovalTime(time: number) {
+        this.base.boxRemovalTime = time;
+        return this;
+    }
+
+    setSessionResetTime(time: number) {
+        this.base.sessionResetTime = time;
+        return this;
+    }
+
+    setAdminProfileId(profileId: ObjectId) {
+        this.base.adminProfile_id = profileId;
+        return this;
+    }
+
+    setAdminPlayerId(playerId: ObjectId) {
+        this.base.adminPlayer_id = playerId;
+        return this;
+    }
+
+    setClanIds(clanIds: ObjectId[]) {
+        this.base.clan_ids = clanIds;
+        return this;
+    }
+
+    setSoulHomeIds(soulHomeIds: ObjectId[]) {
+        this.base.soulHome_ids = soulHomeIds;
+        return this;
+    }
+
+    setRoomIds(roomIds: ObjectId[]) {
+        this.base.room_ids = roomIds;
+        return this;
+    }
+
+    setStockIds(stockIds: ObjectId[]) {
+        this.base.stock_ids = stockIds;
+        return this;
+    }
+
+    setChatId(chatId: ObjectId) {
+        this.base.chat_id = chatId;
+        return this;
+    }
+
+    setTesters(testers: Tester[]) {
+        this.base.testers = testers;
+        return this;
+    }
+
+    setAccountClaimersIds(accountClaimersIds: string[]) {
+        this.base.accountClaimersIds = accountClaimersIds;
+        return this;
+    }
+
+    setDailyTasks(dailyTasks: DailyTask[]) {
+        this.base.dailyTasks = dailyTasks;
+        return this;
+    }
+}
diff --git a/src/__tests__/box/data/box/GroupAdminBuilder.ts b/src/__tests__/box/data/box/GroupAdminBuilder.ts
new file mode 100644
index 00000000..90f39ec9
--- /dev/null
+++ b/src/__tests__/box/data/box/GroupAdminBuilder.ts
@@ -0,0 +1,23 @@
+import {ObjectId} from "mongodb";
+import {GroupAdmin} from "../../../../box/schemas/groupAdmin.schema";
+
+export default class GroupAdminBuilder {
+    private readonly base: Partial<GroupAdmin> = {
+        password: 'defaultPassword',
+        _id: null,
+    };
+
+    build(): GroupAdmin {
+        return { ...this.base } as GroupAdmin;
+    }
+
+    setPassword(password: string) {
+        this.base.password = password;
+        return this;
+    }
+
+    setId(id: ObjectId) {
+        this.base._id = id;
+        return this;
+    }
+}
diff --git a/src/__tests__/box/data/box/UpdateBoxDtoBuilder.ts b/src/__tests__/box/data/box/UpdateBoxDtoBuilder.ts
new file mode 100644
index 00000000..7ab56474
--- /dev/null
+++ b/src/__tests__/box/data/box/UpdateBoxDtoBuilder.ts
@@ -0,0 +1,111 @@
+import {UpdateBoxDto} from "../../../../box/dto/updateBox.dto";
+import {SessionStage} from "../../../../box/enum/SessionStage.enum";
+import {ObjectId} from "mongodb";
+import {Tester} from "../../../../box/schemas/tester.schema";
+import {DailyTask} from "../../../../dailyTasks/dailyTasks.schema";
+
+
+export default class UpdateBoxDtoBuilder {
+    private readonly base: Partial<UpdateBoxDto> = {
+        _id: null,
+        adminPassword: null,
+        sessionStage: null,
+        testersSharedPassword: null,
+        boxRemovalTime: null,
+        sessionResetTime: null,
+        adminProfile_id: null,
+        adminPlayer_id: null,
+        clan_ids: null,
+        soulHome_ids: null,
+        room_ids: null,
+        stock_ids: null,
+        chat_id: null,
+        testers: null,
+        accountClaimersIds: null,
+        dailyTasks: null,
+    };
+
+    build(): UpdateBoxDto {
+        return { ...this.base } as UpdateBoxDto;
+    }
+
+    setId(id: string) {
+        this.base._id = id;
+        return this;
+    }
+
+    setAdminPassword(password: string) {
+        this.base.adminPassword = password;
+        return this;
+    }
+
+    setSessionStage(stage: SessionStage) {
+        this.base.sessionStage = stage;
+        return this;
+    }
+
+    setTestersSharedPassword(password: string | null) {
+        this.base.testersSharedPassword = password;
+        return this;
+    }
+
+    setBoxRemovalTime(time: number) {
+        this.base.boxRemovalTime = time;
+        return this;
+    }
+
+    setSessionResetTime(time: number) {
+        this.base.sessionResetTime = time;
+        return this;
+    }
+
+    setAdminProfileId(profileId: ObjectId) {
+        this.base.adminProfile_id = profileId;
+        return this;
+    }
+
+    setAdminPlayerId(playerId: ObjectId) {
+        this.base.adminPlayer_id = playerId;
+        return this;
+    }
+
+    setClanIds(clanIds: ObjectId[]) {
+        this.base.clan_ids = clanIds;
+        return this;
+    }
+
+    setSoulHomeIds(soulHomeIds: ObjectId[]) {
+        this.base.soulHome_ids = soulHomeIds;
+        return this;
+    }
+
+    setRoomIds(roomIds: ObjectId[]) {
+        this.base.room_ids = roomIds;
+        return this;
+    }
+
+    setStockIds(stockIds: ObjectId[]) {
+        this.base.stock_ids = stockIds;
+        return this;
+    }
+
+    setChatId(chatId: ObjectId) {
+        this.base.chat_id = chatId;
+        return this;
+    }
+
+    setTesters(testers: Tester[]) {
+        this.base.testers = testers;
+        return this;
+    }
+
+    setAccountClaimersIds(accountClaimersIds: string[]) {
+        this.base.accountClaimersIds = accountClaimersIds;
+        return this;
+    }
+
+    setDailyTasks(dailyTasks: DailyTask[]) {
+        this.base.dailyTasks = dailyTasks;
+        return this;
+    }
+}
diff --git a/src/__tests__/box/data/boxBuilderFactory.ts b/src/__tests__/box/data/boxBuilderFactory.ts
new file mode 100644
index 00000000..e5592a66
--- /dev/null
+++ b/src/__tests__/box/data/boxBuilderFactory.ts
@@ -0,0 +1,31 @@
+import BoxBuilder from "./box/BoxBuilder";
+import CreateBoxDtoBuilder from "./box/CreateBoxDtoBuilder";
+import UpdateBoxDtoBuilder from "./box/UpdateBoxDtoBuilder";
+import GroupAdminBuilder from "./box/GroupAdminBuilder";
+
+
+type BuilderName = 'Box' | 'CreateBoxDto' | 'UpdateBoxDto' | 'GroupAdmin';
+
+type BuilderMap = {
+    Box: BoxBuilder,
+    CreateBoxDto: CreateBoxDtoBuilder,
+    UpdateBoxDto: UpdateBoxDtoBuilder,
+    GroupAdmin: GroupAdminBuilder
+};
+
+export default class BoxBuilderFactory {
+    static getBuilder<T extends BuilderName>(builderName: T): BuilderMap[T] {
+        switch (builderName) {
+            case 'Box':
+                return new BoxBuilder() as BuilderMap[T];
+            case 'CreateBoxDto':
+                return new CreateBoxDtoBuilder() as BuilderMap[T];
+            case 'UpdateBoxDto':
+                return new UpdateBoxDtoBuilder() as BuilderMap[T];
+            case 'GroupAdmin':
+                return new GroupAdminBuilder() as BuilderMap[T];
+            default:
+                throw new Error(`Unknown builder name: ${builderName}`);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/__tests__/box/modules/box.module.ts b/src/__tests__/box/modules/box.module.ts
new file mode 100644
index 00000000..d875c3e0
--- /dev/null
+++ b/src/__tests__/box/modules/box.module.ts
@@ -0,0 +1,23 @@
+import mongoose from "mongoose";
+import BoxCommonModule from "./boxCommon";
+import { ModelName } from "../../../common/enum/modelName.enum";
+import {BoxService} from "../../../box/box.service";
+import {BoxSchema} from "../../../box/schemas/box.schema";
+import {GroupAdminSchema} from "../../../box/schemas/groupAdmin.schema";
+
+export default class BoxModule {
+    private constructor() {}
+
+    static async getBoxService(){
+        const module = await BoxCommonModule.getModule();
+        return module.resolve(BoxService);
+    }
+
+    static getBoxModel(){
+        return mongoose.model(ModelName.BOX, BoxSchema);
+    }
+
+    static getGroupAdminModel(){
+        return mongoose.model(ModelName.GROUP_ADMIN, GroupAdminSchema);
+    }
+}
diff --git a/src/__tests__/box/modules/boxCommon.ts b/src/__tests__/box/modules/boxCommon.ts
new file mode 100644
index 00000000..6415f39e
--- /dev/null
+++ b/src/__tests__/box/modules/boxCommon.ts
@@ -0,0 +1,34 @@
+import {Test, TestingModule} from '@nestjs/testing';
+import {MongooseModule} from '@nestjs/mongoose';
+import {ModelName} from '../../../common/enum/modelName.enum';
+import {mongooseOptions, mongoString} from '../../test_utils/const/db';
+import {BoxSchema} from "../../../box/schemas/box.schema";
+import {GroupAdminSchema} from "../../../box/schemas/groupAdmin.schema";
+import {BoxService} from "../../../box/box.service";
+
+
+export default class BoxCommonModule {
+    private constructor() {
+    }
+
+    private static module: TestingModule;
+
+    static async getModule() {
+        if (!BoxCommonModule.module)
+            BoxCommonModule.module = await Test.createTestingModule({
+                imports: [
+                    MongooseModule.forRoot(mongoString, mongooseOptions),
+                    MongooseModule.forFeature([
+                        { name: ModelName.BOX, schema: BoxSchema },
+                        { name: ModelName.GROUP_ADMIN, schema: GroupAdminSchema }
+                    ]),
+
+                ],
+                providers: [
+                    BoxService
+                ]
+            }).compile();
+
+        return BoxCommonModule.module;
+    }
+}
\ No newline at end of file
diff --git a/src/__tests__/box/util/isTestingSession.test.ts b/src/__tests__/box/util/isTestingSession.test.ts
new file mode 100644
index 00000000..a0323b3a
--- /dev/null
+++ b/src/__tests__/box/util/isTestingSession.test.ts
@@ -0,0 +1,14 @@
+import {envVars} from "../../../common/service/envHandler/envVars";
+import isTestingSession from "../../../box/util/isTestingSession";
+
+describe('isTestingSession() test suite', () => {
+    it('Should return true when environment variable is set to TESTING_SESSION', () => {
+        envVars.ENVIRONMENT = 'TESTING_SESSION';
+        expect(isTestingSession()).toBeTruthy();
+    });
+
+    it('Should return false when environment variable is not set to TESTING_SESSION', () => {
+        envVars.ENVIRONMENT = 'OTHER_ENVIRONMENT';
+        expect(isTestingSession()).toBeFalsy();
+    });
+});
\ No newline at end of file
diff --git a/src/box/dto/box.dto.ts b/src/box/dto/box.dto.ts
index 7cdd5936..bfba1921 100644
--- a/src/box/dto/box.dto.ts
+++ b/src/box/dto/box.dto.ts
@@ -1,7 +1,7 @@
 import {Expose, Type} from "class-transformer";
 import {ExtractField} from "../../common/decorator/response/ExtractField";
 import {SessionStage} from "../enum/SessionStage.enum";
-import {ObjectId} from "mongoose";
+import {ObjectId} from "mongodb";
 import {Tester} from "../schemas/tester.schema";
 import {DailyTask} from "../../dailyTasks/dailyTasks.schema";
 
diff --git a/src/box/dto/createBox.dto.ts b/src/box/dto/createBox.dto.ts
index 0c788903..dd10aac1 100644
--- a/src/box/dto/createBox.dto.ts
+++ b/src/box/dto/createBox.dto.ts
@@ -7,7 +7,7 @@ import {
     ValidateNested
 } from "class-validator";
 import {SessionStage} from "../enum/SessionStage.enum";
-import { ObjectId } from "mongoose";
+import { ObjectId } from "mongodb";
 import { Tester } from "../schemas/tester.schema";
 import {Type} from "class-transformer";
 import {DailyTask} from "../../dailyTasks/dailyTasks.schema";
diff --git a/src/box/dto/updateBox.dto.ts b/src/box/dto/updateBox.dto.ts
index 4df8d75f..1198609d 100644
--- a/src/box/dto/updateBox.dto.ts
+++ b/src/box/dto/updateBox.dto.ts
@@ -1,6 +1,6 @@
 import {IsArray, IsEnum, IsMongoId, IsNumber, IsOptional, IsString, ValidateNested} from "class-validator";
 import {SessionStage} from "../enum/SessionStage.enum";
-import {ObjectId} from "mongoose";
+import {ObjectId} from "mongodb";
 import {Type} from "class-transformer";
 import {Tester} from "../schemas/tester.schema";
 import {DailyTask} from "../../dailyTasks/dailyTasks.schema";
diff --git a/src/box/util/isTestingSession.ts b/src/box/util/isTestingSession.ts
new file mode 100644
index 00000000..5bc780a4
--- /dev/null
+++ b/src/box/util/isTestingSession.ts
@@ -0,0 +1,10 @@
+import {envVars} from "../../common/service/envHandler/envVars";
+
+/**
+ * Determines whenever the API runs in testing session environment
+ *
+ * @return true if in testing environment or false if not
+ */
+export default function isTestingSession() {
+    return envVars.ENVIRONMENT === 'TESTING_SESSION';
+}
diff --git a/src/common/service/envHandler/envVars.ts b/src/common/service/envHandler/envVars.ts
index cc4793e2..3b9b1768 100644
--- a/src/common/service/envHandler/envVars.ts
+++ b/src/common/service/envHandler/envVars.ts
@@ -1,13 +1,14 @@
 import * as dotenv from "dotenv";
+import * as process from "node:process";
 
 dotenv.config();
 
 // Please remember to add env name here, before you add it to the record
 type EnvName =
-    'PORT' | 'JWT_SECRET' | 'JWT_EXPIRES' | 'PSW_MEMORY' | 'PSW_TIME' | 'PSW_PARALLELISM' |
-    'MONGO_USERNAME' | 'MONGO_PASSWORD' | 'MONGO_HOST' | 'MONGO_PORT' | 'MONGO_DB_NAME' | 
-    'OWNCLOUD_HOST' | 'OWNCLOUD_PORT' | 'OWNCLOUD_USER' | 'OWNCLOUD_PASSWORD' | 'OWNCLOUD_LOG_FILES_SECRET' | 'OWNCLOUD_LOG_FILES_ROOT' | 
-    'REDIS_PASSWORD' | 'REDIS_HOST' | 'REDIS_PORT' | 
+    'PORT' | 'JWT_SECRET' | 'JWT_EXPIRES' | 'PSW_MEMORY' | 'PSW_TIME' | 'PSW_PARALLELISM' | 'ENVIRONMENT' |
+    'MONGO_USERNAME' | 'MONGO_PASSWORD' | 'MONGO_HOST' | 'MONGO_PORT' | 'MONGO_DB_NAME' |
+    'OWNCLOUD_HOST' | 'OWNCLOUD_PORT' | 'OWNCLOUD_USER' | 'OWNCLOUD_PASSWORD' | 'OWNCLOUD_LOG_FILES_SECRET' | 'OWNCLOUD_LOG_FILES_ROOT' |
+    'REDIS_PASSWORD' | 'REDIS_HOST' | 'REDIS_PORT' |
     'MOSQUITTO_HOST' | 'MOSQUITTO_PORT' | 'MOSQUITTO_SUBSCRIBER' | 'MOSQUITTO_SUBSCRIBER_PASSWORD' | 'MOSQUITTO_PUBLISHER' | 'MOSQUITTO_PUBLISHER_PASSWORD';
 
 /**
@@ -18,6 +19,7 @@ type EnvName =
  * @property PSW_MEMORY - Password setting.
  * @property PSW_TIME - Password setting.
  * @property PSW_PARALLELISM - Password setting.
+ * @property ENVIRONMENT - Environment where the API runs, 'PRODUCTION' | 'TESTING_SESSION', default is PRODUCTION
  * @property MONGO_USERNAME - The username for MongoDB authentication.
  * @property MONGO_PASSWORD - The password for MongoDB authentication.
  * @property MONGO_HOST - The MongoDB host address.
@@ -46,6 +48,7 @@ export const envVars: Record<EnvName, string> = {
     PSW_MEMORY: process.env.PSW_MEMORY,
     PSW_TIME: process.env.PSW_TIME,
     PSW_PARALLELISM: process.env.PSW_PARALLELISM,
+    ENVIRONMENT: process.env.ENVIRONMENT ?? 'PRODUCTION',
 
     MONGO_USERNAME: process.env.MONGO_USERNAME,
     MONGO_PASSWORD: process.env.MONGO_PASSWORD,