diff --git a/src/2-business/repositories/iExchangeRateRepository.ts b/src/2-business/repositories/iExchangeRateRepository.ts
index e6784c3..823ddec 100644
--- a/src/2-business/repositories/iExchangeRateRepository.ts
+++ b/src/2-business/repositories/iExchangeRateRepository.ts
@@ -1,5 +1,7 @@
 import { ExchangeRate } from '../../1-domain/entities/exchangeRate'
+import { CurrencyEnum } from '../enums/currencyEnum'
 
 export interface IExchangeRateRepository {
   upsert (entity: ExchangeRate): Promise<ExchangeRate>
+  get (baseCurrency: CurrencyEnum): Promise<ExchangeRate>
 }
diff --git a/test/unit/2-business/exchangeRate/updateExchangeRateUseCase.test.ts b/test/unit/2-business/exchangeRate/updateExchangeRateUseCase.test.ts
index cc6ca33..d99a361 100644
--- a/test/unit/2-business/exchangeRate/updateExchangeRateUseCase.test.ts
+++ b/test/unit/2-business/exchangeRate/updateExchangeRateUseCase.test.ts
@@ -40,7 +40,8 @@ describe('UpdateExchangeRateUseCase', () => {
 
   const setMocks = () => {
     exchangeRateRepository = {
-      upsert: jest.fn().mockResolvedValue(null)
+      upsert: jest.fn().mockResolvedValue(null),
+      get: jest.fn()
     }
     exchangeRateService = {
       getLatestRates: jest.fn().mockResolvedValue(exchangeRateResponseMock)
diff --git a/test/unit/3-adpters/exchangeRate/updateExchangeRateController.test.ts b/test/unit/3-adpters/exchangeRate/updateExchangeRateController.test.ts
index d63fe42..2b0d8c1 100644
--- a/test/unit/3-adpters/exchangeRate/updateExchangeRateController.test.ts
+++ b/test/unit/3-adpters/exchangeRate/updateExchangeRateController.test.ts
@@ -28,7 +28,8 @@ describe('UpdateExchangeRateController', () => {
 
   const setMocks = () => {
     exchangeRateRepository = {
-      upsert: jest.fn().mockResolvedValue(null)
+      upsert: jest.fn().mockResolvedValue(null),
+      get: jest.fn().mockResolvedValue(null)
     }
     exchangeRateService = {
       getLatestRates: jest.fn().mockResolvedValue(exchangeRateResponseMock)