diff --git a/tests/Feature/GoCardlessInstantBankPaymentTest.php b/tests/Feature/GoCardlessInstantBankPaymentTest.php
index 7a7148f357..04dfeab420 100644
--- a/tests/Feature/GoCardlessInstantBankPaymentTest.php
+++ b/tests/Feature/GoCardlessInstantBankPaymentTest.php
@@ -12,6 +12,11 @@
 namespace Tests\Feature;
 
 use App\Models\CompanyGateway;
+use App\Models\GatewayType;
+use App\Models\Invoice;
+use App\Models\PaymentHash;
+use App\Models\PaymentType;
+use App\Utils\Traits\MakesHash;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
 use Illuminate\Routing\Middleware\ThrottleRequests;
 use Tests\MockAccountData;
@@ -24,6 +29,7 @@ class GoCardlessInstantBankPaymentTest extends TestCase
 {
     use DatabaseTransactions;
     use MockAccountData;
+    use MakesHash;
 
     private array $mock = [
   'events' => 
@@ -121,6 +127,105 @@ class GoCardlessInstantBankPaymentTest extends TestCase
 
       // mock the invoice and the payment hash 
 
+    }
+
+    public function testInvoiceDelayedNotificationPayment()
+    {
+
+      $gocardlesspayment = new \stdClass;
+      $links = new \stdClass;
+      $links->mandate = "my_mandate";
+      $gocardlesspayment->links = $links;
+      $gocardlesspayment->id = "gocardless_payment_id";
+
+
+        $invoice = Invoice::factory()->create(
+          [
+            'user_id' => $this->user->id, 
+            'company_id' => $this->company->id, 
+            'client_id' => $this->client->id
+          ]);
+
+        $invoice->status_id = Invoice::STATUS_SENT;
+        $invoice->calc()->getInvoice()->save();
+
+
+        $data_object = json_decode('{"invoices":[{"invoice_id":"xx","amount":0,"due_date":"","invoice_number":"0","additional_info":"2022-07-18"}],"credits":0,"amount_with_fee":15,"client_id":23,"billing_request":"BRQ005YJ7GHF","billing_request_flow":"xxdfdf"}');
+
+        $invoice_object = end($data_object->invoices);
+        $invoice_object->invoice_id = $invoice->hashed_id;
+        $invoice_object->invoice_number = $invoice->number;
+        $invoice_object->amount = $invoice->amount;
+        $data_object->invoices = [$invoice_object];
+        $data_object->client = $this->client->id;
+        $data_object->amount_with_fee = $invoice->amount;
+        
+        $payment_hash = new PaymentHash();
+        $payment_hash->hash = "1234567890abc";
+        $payment_hash->fee_total = 0;
+        $payment_hash->fee_invoice_id = $invoice->hashed_id;
+        $payment_hash->data = $data_object;
+        $payment_hash->save();
+
+
+        $this->assertIsArray($data_object->invoices);
+        $this->assertIsObject(end($data_object->invoices));
+        $this->assertEquals(1, count($data_object->invoices));    
+
+        $test_invoice_object = end($data_object->invoices);
+
+        $this->assertEquals($invoice->hashed_id, $test_invoice_object->invoice_id);
+        $this->assertEquals($invoice->balance, $test_invoice_object->amount);
+
+
+          foreach($this->mock['events'] as $event)
+          {
+
+                if($event['action'] == 'fulfilled' && array_key_exists('billing_request', $event['links'])) {
+
+                  $hash = PaymentHash::whereJsonContains('data->billing_request', $event['links']['billing_request'])->first();
+
+                  $this->assertNotNull($hash);
+                  $this->assertEquals('1234567890abc', $hash->hash);
+
+                  $invoices = Invoice::whereIn('id', $this->transformKeys(array_column($hash->invoices(), 'invoice_id')))->withTrashed()->get();
+
+                  $this->assertNotNull($invoices);
+                  $this->assertEquals(1, $invoices->count());
+
+                  // remove all paid invoices
+                  $invoices->filter(function ($invoice){
+                      return $invoice->isPayable();
+                  });
+
+                  $this->assertEquals(1, $invoices->count());
+
+
+                    $data = [
+                        'payment_method' => $gocardlesspayment->links->mandate,
+                        'payment_type' => PaymentType::INSTANT_BANK_PAY,
+                        'amount' => $hash->data->amount_with_fee,
+                        'transaction_reference' => $gocardlesspayment->id,
+                        'gateway_type_id' => GatewayType::INSTANT_BANK_PAY,
+                    ];
+
+
+                  $this->assertEquals('my_mandate', $data['payment_method']);
+                  $this->assertEquals('gocardless_payment_id', $data['transaction_reference']);
+                  $this->assertEquals($invoice->balance, $data['amount']);
+                }
+
+          }
+
+
+
+
+
+
+
+
+
+
 
     }