diff --git a/tests/Feature/AdminPlatformOrderAddRefundReceiptShouldNotChangePaymentStatusWhenOrderUnpaidTest.php b/tests/Feature/AdminPlatformOrderAddRefundReceiptShouldNotChangePaymentStatusWhenOrderUnpaidTest.php
new file mode 100644
index 0000000..cdff7ab
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderAddRefundReceiptShouldNotChangePaymentStatusWhenOrderUnpaidTest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderAddRefundReceiptShouldNotChangePaymentStatusWhenOrderUnpaidTest 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_add_refund_receipt_should_not_change_payment_status_when_order_is_unpaid(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_add_refund_receipt_unpaid_should_not_change_status',
+            'name' => '追加退款回执不改变未支付状态测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 30,
+            'list_price' => 30,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_ADD_REFUND_RECEIPT_UNPAID_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 30,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        $this->post('/admin/platform-orders/' . $order->id . '/add-refund-receipt', [
+            'type' => 'refund',
+            'channel' => 'offline',
+            'amount' => 1,
+            'refunded_at' => now()->format('Y-m-d H:i:s'),
+            'note' => '未支付订单的退款留痕',
+        ])
+            ->assertRedirect('/admin/platform-orders/' . $order->id . '#add-refund-receipt')
+            ->assertSessionHas('success');
+
+        $order->refresh();
+
+        // 口径：未支付订单追加退款回执仅留痕，不自动推进支付状态（避免出现未付却部分退款/已退款的脏状态）。
+        $this->assertSame('unpaid', (string) $order->payment_status);
+        $this->assertNull($order->refunded_at);
+
+        $this->assertSame(1, (int) data_get($order->meta, 'refund_summary.count'));
+        $this->assertSame(1.0, (float) data_get($order->meta, 'refund_summary.total_amount'));
+    }
+}