diff --git a/src/Models/InvoiceDetails.php b/src/Models/InvoiceDetails.php
index 54ae8b1..ba89880 100644
--- a/src/Models/InvoiceDetails.php
+++ b/src/Models/InvoiceDetails.php
@@ -872,9 +872,6 @@ public function setNotVAT195(?bool $notVAT195): static
     public function set($key, $value): static
     {
         if (($key === 'expensesClassification' || $key === 'incomeClassification') && !is_array($value)) {
-            if (!($value instanceof IncomeClassification || $value instanceof ExpensesClassification)) {
-                throw new InvalidArgumentException("Invalid value for key $key.");
-            }
             return $this->push($key, $value);
         }
 
diff --git a/tests/InvoiceDetailsTest.php b/tests/InvoiceDetailsTest.php
index 4f0c939..b752cac 100644
--- a/tests/InvoiceDetailsTest.php
+++ b/tests/InvoiceDetailsTest.php
@@ -12,9 +12,6 @@
 use Firebed\AadeMyData\Models\IncomeClassification;
 use Firebed\AadeMyData\Models\Invoice;
 use Firebed\AadeMyData\Models\InvoiceDetails;
-use Firebed\AadeMyData\Models\PaymentMethod;
-use Firebed\AadeMyData\Models\Ship;
-use InvalidArgumentException;
 use PHPUnit\Framework\TestCase;
 use Tests\Traits\HandlesInvoiceXml;
 
@@ -146,13 +143,4 @@ public function test_it_converts_xml_to_invoice_rows(): void
         $this->assertEquals(1000, $ecls2->getAmount());
         $this->assertEquals(3, $ecls2->getId());
     }
-
-    public function test_it_catches_invalid_classification_arguments()
-    {
-        $this->expectException(InvalidArgumentException::class);
-
-        $details = new InvoiceDetails();
-        $details->set('expensesClassification', new PaymentMethod());
-        $details->set('incomeClassification', new Ship());
-    }
 }