diff --git a/tests/Feature/AdminPlatformOrderIndexBatchMarkActivatedButtonShouldDisableWhenSyncStatusFailedTest.php b/tests/Feature/AdminPlatformOrderIndexBatchMarkActivatedButtonShouldDisableWhenSyncStatusFailedTest.php
new file mode 100644
index 0000000..45c7f9d
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderIndexBatchMarkActivatedButtonShouldDisableWhenSyncStatusFailedTest.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderIndexBatchMarkActivatedButtonShouldDisableWhenSyncStatusFailedTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_batch_mark_activated_button_should_disable_when_sync_status_failed_even_if_paid_pending(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        // paid + pending 但 sync_status=failed（与“待生效 unsynced”口径互斥）
+        $res = $this->get('/admin/platform-orders?payment_status=paid&status=pending&sync_status=failed');
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $this->assertStringContainsString('批量仅标记为已生效（当前筛选范围）', $html);
+        $this->assertStringContainsString('data-role="batch-mark-activated-blocked-hint"', $html);
+        $this->assertStringContainsString('sync_status=unsynced', $html);
+
+        $this->assertTrue(str_contains($html, 'type="submit" disabled') || str_contains($html, 'disabled="disabled"'));
+    }
+}