diff --git a/addons/shopro/controller/Pay.php b/addons/shopro/controller/Pay.php
index e75e280..91051a0 100644
--- a/addons/shopro/controller/Pay.php
+++ b/addons/shopro/controller/Pay.php
@@ -137,7 +137,7 @@ class Pay extends Base
                         'user_id'  => $order->user_id,
                         'provider' => 'Wechat',
                         'platform' => $platform
-                    ])->find();
+                    ])->order('id', 'desc')->find();
 
                     $order_data['openid'] = $oauth ? $oauth->openid : '';
                 }
diff --git a/tests/UserOauthPayOpenidTest.php b/tests/UserOauthPayOpenidTest.php
new file mode 100644
index 0000000..516ea1b
--- /dev/null
+++ b/tests/UserOauthPayOpenidTest.php
@@ -0,0 +1,41 @@
+<?php
+define('ROOT_PATH', __DIR__ . '/../');
+define('APP_PATH', ROOT_PATH . 'application/');
+define('ADDON_PATH', ROOT_PATH . 'addons' . DIRECTORY_SEPARATOR);
+define('DS', DIRECTORY_SEPARATOR);
+
+require ROOT_PATH . 'thinkphp/base.php';
+\think\Config::set('database', include ROOT_PATH . 'application/database.php');
+
+// 注册 epay 命名空间
+$libraryDir = ADDON_PATH . 'epay' . DS . 'library' . DS;
+\think\Loader::addNamespace('Yansongda\\Pay', $libraryDir . 'v2' . DS . 'Yansongda' . DS . 'Pay' . DS);
+\think\Loader::addNamespace('Yansongda\\Supports', $libraryDir . 'v2' . DS . 'Yansongda' . DS . 'Supports' . DS);
+
+// 测试用例：验证用户 24 的 openid 获取逻辑与统一下单参数匹配
+$userId = 24;
+$platform = 'wxMiniProgram';
+
+// 测试：按 id desc 排序获取最新的 openid
+$oauth = \addons\shopro\model\UserOauth::where([
+    'user_id'  => $userId,
+    'provider' => 'Wechat',
+    'platform' => $platform
+])->order('id', 'desc')->find();
+
+echo "【测试】查询用户 {$userId} 的最新授权记录:\n";
+if (!$oauth) {
+    echo "FAIL: 未找到用户授权记录\n";
+    exit(1);
+}
+
+echo "ID: {$oauth->id}, Openid: {$oauth->openid}\n";
+
+// 验证 openid 是否为当前小程序的有效 openid（以 oGsUG 开头）
+if (strpos($oauth->openid, 'oGsUG') !== 0) {
+    echo "FAIL: 获取到的不是当前小程序的有效 openid (期望以 oGsUG 开头)\n";
+    exit(1);
+}
+
+echo "PASS: 成功获取到当前小程序匹配的有效 openid\n";
+exit(0);