--- original standalone test
+++ isolated fixture variant
@@ -123,6 +123,22 @@
 $app = new \think\App();
 $app->setEnvName(TP_ENV === 'prod' && BUSINESS !== 'aizhct' ? TP_ENV . BUSINESS : TP_ENV);
 $app->initialize();
+
+// Test-only isolated metadata fixture. Original assertions are unchanged.
+$upgradeFixtureFile = tempnam(sys_get_temp_dir(), 'upgrade-wechat-');
+\think\facade\Config::set([
+    'default' => 'upgrade_fixture',
+    'connections' => [
+        'upgrade_fixture' => [
+            'type' => 'sqlite', 'database' => $upgradeFixtureFile,
+            'prefix' => 'yoshop_', 'deploy' => 0,
+            'break_reconnect' => false, 'trigger_sql' => false,
+        ],
+    ],
+], 'database');
+\think\facade\Db::connect()->execute('CREATE TABLE yoshop_recharge_order (order_id INTEGER PRIMARY KEY, pay_price DECIMAL(10,2), create_time INTEGER, update_time INTEGER)');
+register_shutdown_function(function () use ($upgradeFixtureFile) { @unlink($upgradeFixtureFile); });
+
 $logConfig = \think\facade\Config::get('log');
 $logConfig['channels']['file']['path'] = '/tmp/ai_api_logs/';
 \think\facade\Config::set($logConfig, 'log');