diff --git a/tests/PHPUnit/WcGateway/Gateway/OXXO/OXXOGatewayTest.php b/tests/PHPUnit/WcGateway/Gateway/OXXO/OXXOGatewayTest.php
new file mode 100644
index 000000000..849353b86
--- /dev/null
+++ b/tests/PHPUnit/WcGateway/Gateway/OXXO/OXXOGatewayTest.php
@@ -0,0 +1,140 @@
+<?php
+declare(strict_types=1);
+
+namespace WooCommerce\PayPalCommerce\WcGateway\Gateway\OXXO;
+
+use Mockery;
+use Psr\Log\LoggerInterface;
+use WC_Order;
+use WooCommerce\PayPalCommerce\ApiClient\Endpoint\OrderEndpoint;
+use WooCommerce\PayPalCommerce\ApiClient\Entity\Order;
+use WooCommerce\PayPalCommerce\ApiClient\Entity\PurchaseUnit;
+use WooCommerce\PayPalCommerce\ApiClient\Exception\RuntimeException;
+use WooCommerce\PayPalCommerce\ApiClient\Factory\PurchaseUnitFactory;
+use WooCommerce\PayPalCommerce\ApiClient\Factory\ShippingPreferenceFactory;
+use WooCommerce\PayPalCommerce\TestCase;
+use function Brain\Monkey\Functions\when;
+
+class OXXOGatewayTest extends TestCase
+{
+private $orderEndpoint;
+private $purchaseUnitFactory;
+private $shippingPreferenceFactory;
+private $logger;
+private $wcOrder;
+private $testee;
+
+	public function setUp(): void
+	{
+		parent::setUp();
+
+		$this->orderEndpoint = Mockery::mock(OrderEndpoint::class);
+		$this->purchaseUnitFactory = Mockery::mock(PurchaseUnitFactory::class);
+		$this->shippingPreferenceFactory = Mockery::mock(ShippingPreferenceFactory::class);
+		$this->logger = Mockery::mock(LoggerInterface::class);
+
+		$this->wcOrder = Mockery::mock(WC_Order::class);
+		when('wc_get_order')->justReturn($this->wcOrder);
+		when('get_option')->justReturn([
+			'title' => 'foo',
+			'description' => 'bar',
+		]);
+
+		$this->testee = new OXXOGateway(
+			$this->orderEndpoint,
+			$this->purchaseUnitFactory,
+			$this->shippingPreferenceFactory,
+			$this->logger
+		);
+	}
+
+	public function testProcessPaymentSuccess()
+	{
+		$this->wcOrder->shouldReceive('get_billing_first_name')->andReturn('John');
+		$this->wcOrder->shouldReceive('get_billing_last_name')->andReturn('Doe');
+		$this->wcOrder->shouldReceive('get_billing_email')->andReturn('foo@bar.com');
+		$this->wcOrder->shouldReceive('get_billing_country')->andReturn('MX');
+
+		list($purchaseUnit, $shippingPreference) = $this->setStubs();
+
+		$linkHref = 'https://sandbox.paypal.com/payment/oxxo?token=ABC123';
+		$this->orderEndpoint
+			->shouldReceive('confirm_payment_source')
+			->with('1', [
+					'oxxo' => [
+						'name' => 'John Doe',
+						'email' => 'foo@bar.com',
+						'country_code' => 'MX',
+					]
+				]
+			)->andReturn((object)[
+				'links' => [
+					(object)[
+						'rel' => 'payer-action',
+						'href' => $linkHref,
+					],
+				]
+			]);
+
+		$order = Mockery::mock(Order::class);
+		$order->shouldReceive('id')->andReturn('1');
+
+		$this->orderEndpoint
+			->shouldReceive('create')
+			->with([$purchaseUnit], $shippingPreference)
+			->andReturn($order);
+
+		$this->wcOrder
+			->shouldReceive('add_meta_data')
+			->with('ppcp_oxxo_payer_action', $linkHref)
+			->andReturn(true);
+		$this->wcOrder->shouldReceive('save_meta_data');
+
+		$woocommerce = Mockery::mock(\WooCommerce::class);
+		$cart = Mockery::mock(\WC_Cart::class);
+		when('WC')->justReturn($woocommerce);
+		$woocommerce->cart = $cart;
+		$cart->shouldReceive('empty_cart');
+
+		$result = $this->testee->process_payment(1);
+		$this->assertEquals('success', $result['result']);
+	}
+
+	public function testProcessPaymentFailure()
+	{
+		list($purchaseUnit, $shippingPreference) = $this->setStubs();
+
+		$this->orderEndpoint
+			->shouldReceive('create')
+			->with([$purchaseUnit], $shippingPreference)
+			->andThrows(RuntimeException::class);
+
+		$this->logger->shouldReceive('error');
+		when('wc_add_notice')->justReturn();
+		when('wc_get_checkout_url')->justReturn();
+		$this->wcOrder->shouldReceive('update_status');
+
+		$result = $this->testee->process_payment(1);
+		$this->assertEquals('failure', $result['result']);
+
+	}
+
+	/**
+	 * @return array
+	 */
+	private function setStubs(): array
+	{
+		$purchaseUnit = Mockery::mock(PurchaseUnit::class);
+		$this->purchaseUnitFactory
+			->shouldReceive('from_wc_order')
+			->with($this->wcOrder)
+			->andReturn($purchaseUnit);
+
+		$shippingPreference = 'SOME_SHIPPING_PREFERENCE';
+		$this->shippingPreferenceFactory
+			->shouldReceive('from_state')
+			->with($purchaseUnit, 'checkout')
+			->andReturn($shippingPreference);
+		return array($purchaseUnit, $shippingPreference);
+	}
+}