diff --git a/.gitignore b/.gitignore
index 9dd76421..4f8507fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+# ============= Config e2e =============
+/e2e/e2e.config.ts
+
 # ============= Lint =============
 # Cache eslint
 .eslintcache
diff --git a/e2e/demo/demo.spec.ts b/e2e/demo/demo.spec.ts
deleted file mode 100644
index 7fe8d120..00000000
--- a/e2e/demo/demo.spec.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-test('demo', () => {
-	//config.access_token;
-	expect(true).toBeTruthy();
-});
diff --git a/e2e/example.e2e.config.ts b/e2e/example.e2e.config.ts
new file mode 100644
index 00000000..df8a0864
--- /dev/null
+++ b/e2e/example.e2e.config.ts
@@ -0,0 +1,13 @@
+/**
+ * This is an example configuration file for e2e tests, where you must add your credentials and other personal settings.
+ * Inside the e2e directory, create a file with the name: e2e.config.ts.
+ * Copy the contents of the example file, add it to the e2e.config.ts file and add your personal settings.
+ */
+
+const config = {
+	access_token: '',
+};
+
+export {
+	config,
+};
diff --git a/e2e/jest.config.ts b/e2e/jest.config.ts
index f8a77fe1..98e0ddb1 100644
--- a/e2e/jest.config.ts
+++ b/e2e/jest.config.ts
@@ -1,8 +1,8 @@
 import jestConfig from '../jest.config';
 
+jestConfig.rootDir = '../';
 jestConfig.testPathIgnorePatterns = [
-	'/node_modules/',
-	'/src/'
+	'src'
 ];
 
 export default jestConfig;
diff --git a/e2e/preference/create.spec.ts b/e2e/preference/create.spec.ts
new file mode 100644
index 00000000..f75c62b6
--- /dev/null
+++ b/e2e/preference/create.spec.ts
@@ -0,0 +1,50 @@
+import MercadoPago, { Preference } from '@src/index';
+import { config } from '../e2e.config';
+import type { PreferenceCreateData } from '@src/clients/preference/create/types';
+
+describe('Preference IT, create', () => {
+	test('should create Preference and match response object', async () => {
+
+		const client = new MercadoPago({  accessToken: config.access_token, options: { timeout: 5000 } });
+		const preference = new Preference(client);
+
+		const preferenceRequest: PreferenceCreateData = {
+			body: {
+				items: [
+					{
+						id: '4567',
+						category_id: 'car_electronics',
+						currency_id: 'BRL',
+						description: 'Dummy create',
+						picture_url: 'https://http2.mlstatic.com/D_NQ_NP_887467-MLA71526269815_092023-F.jpg',
+						title: 'Dummy Title',
+						quantity: 1,
+						unit_price: 10
+					}
+				],
+			}
+		};
+
+		const response = await preference.create(preferenceRequest);
+		expect(response.items[0].title).toBe(preferenceRequest.body.items[0].title);
+		expect(response).toEqual(expect.objectContaining({
+			init_point: expect.any(String),
+			client_id: expect.any(String),
+			collector_id: expect.any(Number),
+			date_created: expect.any(String),
+			id: expect.any(String),
+			sandbox_init_point: expect.any(String),
+			site_id: expect.any(String),
+		}));
+		expect(response.items[0]).toEqual(expect.objectContaining({
+			id: expect.any(String),
+			category_id: expect.any(String),
+			currency_id: expect.any(String),
+			description: expect.any(String),
+			picture_url: expect.any(String),
+			title: expect.any(String),
+			quantity: expect.any(Number),
+			unit_price: expect.any(Number),
+		}));
+	});
+});
diff --git a/e2e/preference/get.spec.ts b/e2e/preference/get.spec.ts
new file mode 100644
index 00000000..77a66130
--- /dev/null
+++ b/e2e/preference/get.spec.ts
@@ -0,0 +1,45 @@
+import MercadoPago, { Preference } from '@src/index';
+import { config } from '../e2e.config';
+import type { PreferenceCreateData } from '@src/clients/preference/create/types';
+
+describe('Preference IT, get', () => {
+	test('should get preference and match response object', async () => {
+		const client = new MercadoPago({ accessToken: config.access_token, options: { timeout: 5000 } });
+		const preference = new Preference(client);
+
+		const preferenceRequest: PreferenceCreateData = {
+			body: {
+				items: [
+					{
+						id: '4567',
+						title: 'Dummy Title Create',
+						quantity: 1,
+						unit_price: 10
+					}
+				], }
+		};
+		const request = await preference.create(preferenceRequest);
+
+		const response = await preference.get({ preferenceId: request.id });
+		expect(response).toHaveProperty('id', request.id);
+		expect(response).toEqual(expect.objectContaining({
+			init_point: expect.any(String),
+			client_id: expect.any(String),
+			collector_id: expect.any(Number),
+			date_created: expect.any(String),
+			id: expect.any(String),
+			sandbox_init_point: expect.any(String),
+			site_id: expect.any(String),
+		}));
+		expect(response.items[0]).toEqual(expect.objectContaining({
+			id: expect.any(String),
+			category_id: expect.any(String),
+			currency_id: expect.any(String),
+			description: expect.any(String),
+			title: expect.any(String),
+			quantity: expect.any(Number),
+			unit_price: expect.any(Number),
+		}));
+	});
+
+});
diff --git a/e2e/preference/search.spec.ts b/e2e/preference/search.spec.ts
new file mode 100644
index 00000000..f93b5155
--- /dev/null
+++ b/e2e/preference/search.spec.ts
@@ -0,0 +1,31 @@
+import MercadoPago, { Preference } from '@src/index';
+import { config } from '../e2e.config';
+
+describe('Preference IT, search', () => {
+	test('should search a request and match response object', async () => {
+		const client = new MercadoPago({  accessToken: config.access_token, options: { timeout: 5000 } });
+		const preference = new Preference(client);
+
+		const searched = await preference.search();
+
+		expect(searched).toEqual(expect.objectContaining({
+			elements: expect.any(Array),
+			next_offset: expect.any(Number),
+			total: expect.any(Number),
+		}));
+		expect(searched.elements.length).toBeGreaterThan(0);
+		expect(searched.elements[0]).toEqual(expect.objectContaining({
+			id: expect.any(String),
+			client_id: expect.any(String),
+			collector_id: expect.any(Number),
+			date_created: expect.any(String),
+			expires: expect.any(Boolean),
+			live_mode: expect.any(Boolean),
+			marketplace: expect.any(String),
+			operation_type: expect.any(String),
+			site_id:  expect.any(String),
+			sponsor_id: expect.any(Number),
+			shipping_mode: expect.any(String),
+		}));
+	});
+});
diff --git a/e2e/preference/update.spec.ts b/e2e/preference/update.spec.ts
new file mode 100644
index 00000000..da139dc3
--- /dev/null
+++ b/e2e/preference/update.spec.ts
@@ -0,0 +1,64 @@
+import MercadoPago, { Preference } from '@src/index';
+import { config } from '../e2e.config';
+import type { PreferenceCreateData } from '@src/clients/preference/create/types';
+import type { PreferenceUpdateData } from '@src/clients/preference/update/types';
+
+describe('Preference IT, update', () => {
+	test('should update request and match response object', async () => {
+		const client = new MercadoPago({ accessToken: config.access_token });
+		const preference = new Preference(client);
+
+		const preferenceRequest: PreferenceCreateData = {
+			body: {
+				items: [
+					{
+						id: '4567',
+						title: 'Dummy Title Create',
+						quantity: 1,
+						unit_price: 10
+					}
+				],
+			}
+		};
+		const request = await preference.create(preferenceRequest);
+
+		const updateRequest: PreferenceUpdateData = {
+			id: request.id,
+			updatePreferenceRequest: {
+				items: [
+					{
+						id: '4567',
+						title: 'Dummy Title Update',
+						quantity: 1,
+						unit_price: 10
+					}
+				],
+			}
+		};
+		const response = await preference.update(updateRequest);
+
+		expect(response).toEqual(expect.objectContaining({
+			id: request.id,
+		}));
+		expect(response.items[0].title).toBe(updateRequest.updatePreferenceRequest.items[0].title);
+		expect(response).toEqual(expect.objectContaining({
+			init_point: expect.any(String),
+			client_id: expect.any(String),
+			collector_id: expect.any(Number),
+			date_created: expect.any(String),
+			id: expect.any(String),
+			sandbox_init_point: expect.any(String),
+			site_id: expect.any(String),
+		}));
+		expect(response.items[0]).toEqual(expect.objectContaining({
+			id: expect.any(String),
+			category_id: expect.any(String),
+			currency_id: expect.any(String),
+			description: expect.any(String),
+			title: expect.any(String),
+			quantity: expect.any(Number),
+			unit_price: expect.any(Number),
+		}));
+	});
+
+});
diff --git a/jest.config.ts b/jest.config.ts
index 54391a15..1061b699 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -12,7 +12,7 @@ const jestConfig: JestConfigWithTsJest = {
 		'text-summary'
 	],
 	testMatch: [
-		'**/?(*.)+(spec|test).[tj]s?(x)'
+		'**/?(*.)spec.ts'
 	],
 	transform: { '^.+\\.(ts|tsx)$': 'ts-jest' },
 	moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
diff --git a/src/clients/payment/search/types.ts b/src/clients/payment/search/types.ts
index 00a31220..a5720e28 100644
--- a/src/clients/payment/search/types.ts
+++ b/src/clients/payment/search/types.ts
@@ -45,6 +45,7 @@ export declare type PaymentSearchResult = {
   merchant_account_id: string;
   acquirer: string;
   merchant_number: string;
+  external_reference: string;
 };
 
 export declare type Payer = {
diff --git a/tsconfig.json b/tsconfig.json
index 302f3b5b..f6808185 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,7 +10,7 @@
     "sourceMap": false,
     "outDir": "./dist",
     "baseUrl": "./",
-    "rootDir": "./src",
+    "rootDir": ".",
     "resolveJsonModule": true,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
@@ -22,5 +22,5 @@
       "@clients/*": ["./src/clients/*"]
     }
   },
-  "include": ["src/**/*"]
+  "include": ["src/**/*", "e2e/**/*"]
 }