diff --git a/tests/Feature/ApiOrderLogTest.php b/tests/Feature/ApiOrderLogTest.php
index 4a4c5b4..aba3dee 100644
--- a/tests/Feature/ApiOrderLogTest.php
+++ b/tests/Feature/ApiOrderLogTest.php
@@ -174,6 +174,29 @@ test('variations-sku wird dem basisprodukt zugeordnet', function () {
     expect(ShoppingOrderItem::query()->where('shopping_order_id', $log->shopping_order_id)->where('product_id', $product->id)->count())->toBe(1);
 });
 
+test('produkt nur zur internen berechnung (show_on 10) wird per api zugeordnet', function () {
+    // show_on steuert nur die Anzeige (Shop, Bestelllisten, Microsite …) —
+    // die API-Zuordnung läuft ausschließlich über die WP-Nummer.
+    Mail::fake();
+    Passport::actingAs(apilogMakeUser());
+    $product = apilogMakeProduct('Apilog Intern', 10050);
+    $product->update(['show_on' => ['10']]);
+    apilogMakeShoppingUser(4718);
+
+    $this->postJson('https://api.'.config('app.api_domain').'/wp/order', [
+        'wp_order_number' => 4718,
+        'wp_order' => [
+            ['article' => 10050, 'qty' => 1, 'price' => 1990],
+        ],
+    ])->assertOk();
+
+    $log = ApiOrderLog::query()->sole();
+    expect($log->has_errors)->toBeFalse()
+        ->and($log->payload['lines'][0]['product_id'])->toBe($product->id);
+
+    expect(ShoppingOrderItem::query()->where('shopping_order_id', $log->shopping_order_id)->where('product_id', $product->id)->count())->toBe(1);
+});
+
 test('sku ohne basis vor dem minus wird nicht zugeordnet', function () {
     Mail::fake();
     Passport::actingAs(apilogMakeUser());