diff --git a/Test/Integration/AbstractTestCase.php b/Test/Integration/AbstractTestCase.php
new file mode 100644
index 0000000..c9d260c
--- /dev/null
+++ b/Test/Integration/AbstractTestCase.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mbissonho\BancoInter\Test\Integration;
+
+use Magento\Framework\ObjectManagerInterface;
+use Magento\Sales\Api\Data\OrderInterface;
+use Magento\Sales\Model\Order\Payment;
+use Magento\TestFramework\Helper\Bootstrap;
+use PHPUnit\Framework\TestCase;
+use Mbissonho\BancoInter\Model\Ui\Boleto\ConfigProvider as BoletoConfigProvider;
+use Magento\Sales\Model\OrderFactory;
+
+abstract class AbstractTestCase extends TestCase
+{
+
+    protected function getObjectManager(): ObjectManagerInterface
+    {
+        return Bootstrap::getObjectManager();
+    }
+
+    protected function getOrderWithBoletoPaymentMethod(): OrderInterface
+    {
+        $order = $this->getObjectManager()->get(OrderFactory::class)->create()
+            ->loadByIncrementId('100000001');
+        /** @var Payment $payment */
+        $payment = $this->getObjectManager()->create(Payment::class);
+        $payment->setMethod(BoletoConfigProvider::CODE);;
+        $payment->setOrder($order);
+        $order->setPayment($payment);
+        $order->save();
+
+        return $order;
+    }
+
+}
diff --git a/Test/Integration/BoletoPaymentMethodTest.php b/Test/Integration/BoletoPaymentMethodTest.php
new file mode 100644
index 0000000..720cca5
--- /dev/null
+++ b/Test/Integration/BoletoPaymentMethodTest.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mbissonho\BancoInter\Test\Integration;
+
+use Magento\Payment\Model\Method\Adapter as PaymentMethodAdapter;
+use Magento\Quote\Api\Data\CartInterface;
+
+class BoletoPaymentMethodTest extends AbstractTestCase
+{
+
+    public function testBoletoMethodIsRegistered()
+    {
+        $boletoPaymentMethodAdapter = $this->getPaymentMethodAdapter();
+        $this->assertSame('mbissonho_bancointer_boleto', $boletoPaymentMethodAdapter->getCode());
+
+        /** @var CartInterface $quote */
+        $quote = $this->createMock(CartInterface::class);
+        $quote->method('getStoreId')->willReturn(0);
+        $this->assertFalse($boletoPaymentMethodAdapter->isAvailable($quote));
+        $this->assertTrue($boletoPaymentMethodAdapter->canUseCheckout());
+    }
+
+    private function getPaymentMethodAdapter(): PaymentMethodAdapter
+    {
+        return $this->getObjectManager()->get('BancoInterBoletoRemoteMethodAdapter');
+    }
+
+}
diff --git a/Test/Integration/Gateway/AbstractGatewayTestCase.php b/Test/Integration/Gateway/AbstractGatewayTestCase.php
new file mode 100644
index 0000000..148d610
--- /dev/null
+++ b/Test/Integration/Gateway/AbstractGatewayTestCase.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Mbissonho\BancoInter\Test\Integration\Gateway;
+
+use Magento\Payment\Gateway\Data\PaymentDataObjectFactoryInterface;
+use Magento\Payment\Gateway\Data\PaymentDataObjectInterface;
+use Magento\Sales\Api\Data\OrderInterface;
+use Mbissonho\BancoInter\Test\Integration\AbstractTestCase;
+
+abstract class AbstractGatewayTestCase extends AbstractTestCase
+{
+
+    protected function getNewPaymentDataObjectFromOrder(OrderInterface $order): PaymentDataObjectInterface
+    {
+        /** @var PaymentDataObjectFactoryInterface $paymentDataObjectFactory */
+        $paymentDataObjectFactory = $this->getObjectManager()->get(PaymentDataObjectFactoryInterface::class);
+        return $paymentDataObjectFactory->create($order->getPayment());
+    }
+
+}
diff --git a/Test/Integration/Gateway/Boleto/Response/IssueResponseHandlerTest.php b/Test/Integration/Gateway/Boleto/Response/IssueResponseHandlerTest.php
new file mode 100644
index 0000000..e5536ea
--- /dev/null
+++ b/Test/Integration/Gateway/Boleto/Response/IssueResponseHandlerTest.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace Mbissonho\BancoInter\Test\Integration\Gateway\Boleto\Response;
+
+use Magento\Framework\DataObject;
+use Magento\Framework\Exception\LocalizedException;
+use Mbissonho\BancoInter\Gateway\Boleto\Response\IssueResponseHandler;
+use Mbissonho\BancoInter\Test\Integration\Gateway\AbstractGatewayTestCase;
+
+class IssueResponseHandlerTest extends AbstractGatewayTestCase
+{
+    private IssueResponseHandler $issueResponseHandler;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->issueResponseHandler = $this->getObjectManager()->get(IssueResponseHandler::class);
+    }
+
+    /**
+     * @magentoDataFixture   Magento/Sales/_files/order.php
+     * @throws LocalizedException
+     */
+    public function testThatValidGatewayResponseCausesCorrectEffects()
+    {
+        $order = $this->getOrderWithBoletoPaymentMethod();
+
+        $this->issueResponseHandler->handle(
+            [
+                'payment' => $this->getNewPaymentDataObjectFromOrder($order),
+                'stateObject' => new DataObject
+            ],
+            [
+                'body' => json_encode([
+                    "seuNumero" => "1234",
+                    "nossoNumero" => "98754",
+                    "codigoBarras" => "5555555555555555554",
+                    "linhaDigitavel" => "444444444444444445",
+                ]),
+            ]
+        );
+
+        $payment = $order->getPayment();
+
+        self::assertEquals("98754", $payment->getTransactionId());
+        self::assertFalse($payment->getIsTransactionClosed());
+    }
+
+}
diff --git a/Test/Mftf/Page/AdminConfigPaymentMethodsPage.xml b/Test/Mftf/Page/AdminConfigPaymentMethodsPage.xml
new file mode 100644
index 0000000..6aeca0d
--- /dev/null
+++ b/Test/Mftf/Page/AdminConfigPaymentMethodsPage.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+<pages xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/PageObject.xsd">
+    <page name="AdminConfigPaymentMethodsPage" url="admin/system_config/edit/section/payment/" area="admin" module="Magento_Config">
+        <section name="BancoInterMbissonhoPaymentsConfigSection"/>
+    </page>
+</pages>
diff --git a/Test/Mftf/README.md b/Test/Mftf/README.md
new file mode 100644
index 0000000..ae7aef6
--- /dev/null
+++ b/Test/Mftf/README.md
@@ -0,0 +1,3 @@
+# Functional Tests
+
+The Functional Test Module for **Mbissonho BancoInter** module.
diff --git a/Test/Mftf/Section/BancoInterMbissonhoPaymentsConfigSection.xml b/Test/Mftf/Section/BancoInterMbissonhoPaymentsConfigSection.xml
new file mode 100644
index 0000000..466adbf
--- /dev/null
+++ b/Test/Mftf/Section/BancoInterMbissonhoPaymentsConfigSection.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
+    <section name="BancoInterMbissonhoPaymentsConfigSection">
+        <element name="mbissonho_bancointer_payments_config_section_header"
+                 type="text" selector="#payment_us_mbissonho_bancointer-head"/>
+    </section>
+</sections>
diff --git a/Test/Mftf/Test/AdminConfigPaymentsSectionSeeMbissonhoBancoInterSectionTest.xml b/Test/Mftf/Test/AdminConfigPaymentsSectionSeeMbissonhoBancoInterSectionTest.xml
new file mode 100644
index 0000000..1b59474
--- /dev/null
+++ b/Test/Mftf/Test/AdminConfigPaymentsSectionSeeMbissonhoBancoInterSectionTest.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
+    <test name="AdminConfigPaymentsSectionSeeMbissonhoBancoInterSectionTest">
+        <annotations>
+            <features value="Mbissonho_BancoInter"/>
+            <stories value="Payment methods"/>
+        </annotations>
+        <after>
+            <actionGroup ref="AdminLogoutActionGroup" stepKey="amOnLogoutPage"/>
+        </after>
+
+        <actionGroup ref="AdminLoginActionGroup" stepKey="loginAsAdmin1"/>
+        <amOnPage url="{{AdminConfigPaymentMethodsPage.url}}" stepKey="navigateToConfigurationPage"/>
+        <waitForPageLoad stepKey="waitForPageLoad1"/>
+        <seeElement selector="{{BancoInterMbissonhoPaymentsConfigSection.mbissonho_bancointer_payments_config_section_header}}"
+                    stepKey="seeSection"/>
+    </test>
+</tests>