diff --git a/tests/unit/includes/gateway/class-omise-payment-duitnow-obw-test.php b/tests/unit/includes/gateway/class-omise-payment-duitnow-obw-test.php
new file mode 100644
index 00000000..02a54990
--- /dev/null
+++ b/tests/unit/includes/gateway/class-omise-payment-duitnow-obw-test.php
@@ -0,0 +1,33 @@
+<?php
+
+require_once __DIR__ . '/class-omise-offsite-test.php';
+
+class Omise_Payment_DuitNow_OBW_Test extends Omise_Offsite_Test
+{
+    public function setUp(): void
+    {
+        $this->sourceType = 'duitnow_obw';
+        parent::setUp();
+        require_once __DIR__ . '/../../../../includes/gateway/class-omise-payment-duitnow-obw.php';
+
+        // if (!function_exists('wp_enqueue_script')) {
+        //     function wp_enqueue_script() {}
+        // }
+
+        // if (!function_exists('plugins_url')) {
+        //     function plugins_url() {}
+        // }
+
+        // dummy version
+    //     if (!defined('WC_VERSION')) {
+    //         define('WC_VERSION', '1.0.0');
+    //     }
+    }
+
+    public function testCharge()
+    {
+        $_POST['source'] = ['bank' => 'SCB'];
+        $obj = new Omise_Payment_DuitNow_OBW();
+        $this->getChargeTest($obj);
+    }
+}