diff --git a/tests/Unit/Resources/FulfillmentInbound/FulfillmentInbound20240320ResourceTest.php b/tests/Unit/Resources/FulfillmentInbound/FulfillmentInbound20240320ResourceTest.php
index 321ba04..f0b2c55 100644
--- a/tests/Unit/Resources/FulfillmentInbound/FulfillmentInbound20240320ResourceTest.php
+++ b/tests/Unit/Resources/FulfillmentInbound/FulfillmentInbound20240320ResourceTest.php
@@ -739,7 +739,7 @@ public function testGetInboundOperationStatus(): void
         );
 
         $this->assertInstanceOf(InboundOperationStatusResponse::class, $response);
-        $this->assertEquals('The dimension does not match what is expected.', $response->operation_problems[0]->message);
+        $this->assertEquals('The dimension does not match what is expected.', $response->operation->operation_problems[0]->message);
 
         $http->assertSent(function (Request $request) use ($operation_id) {
             $this->assertEquals('GET', $request->method());