diff --git a/tests/Feature/AdminPlatformOrderCreateRequireSubscriptionFlagShouldPersistAfterValidationErrorTest.php b/tests/Feature/AdminPlatformOrderCreateRequireSubscriptionFlagShouldPersistAfterValidationErrorTest.php
new file mode 100644
index 0000000..a4ec5c4
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderCreateRequireSubscriptionFlagShouldPersistAfterValidationErrorTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderCreateRequireSubscriptionFlagShouldPersistAfterValidationErrorTest 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_require_subscription_should_still_take_effect_after_store_validation_error_even_without_query(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->create([
+            'name' => '校验失败回填站点',
+            'slug' => 'validation-back-merchant',
+            'status' => 'active',
+        ]);
+
+        $plan = Plan::query()->create([
+            'code' => 'po_require_sub_persist_after_validation_error_plan',
+            'name' => 'require_subscription 校验失败回填测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        // 关键点：from() 不带 require_subscription query，模拟“来源页没显式带 query”或被清洗掉。
+        // 但表单提交时如果带了 require_subscription hidden input，校验失败 redirect back 后 create 页仍应保持治理口径。
+        $res = $this->from('/admin/platform-orders/create')->post('/admin/platform-orders', [
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_type' => 'renewal',
+            'require_subscription' => '1',
+            'quantity' => 1,
+            'discount_amount' => 0,
+            'payment_channel' => 'offline',
+            'remark' => 'test',
+            // site_subscription_id 故意不传 => 触发校验失败
+        ]);
+
+        $res->assertStatus(302);
+        $res->assertSessionHasErrors('site_subscription_id');
+
+        $page = $this->get('/admin/platform-orders/create');
+        $page->assertOk();
+
+        // 治理口径仍应生效：仅允许 new_purchase，且应给出“去订阅管理选择订阅”入口
+        $page->assertSee('value="new_purchase"', false);
+        $page->assertDontSee('value="upgrade"', false);
+        $page->assertDontSee('value="downgrade"', false);
+        $page->assertSee('去订阅管理选择订阅', false);
+
+        // 透传 hidden input，保证后续继续提交仍保持治理口径
+        $page->assertSee('name="require_subscription" value="1"', false);
+    }
+}