diff --git a/src/DataTransferObjects/Schemas/ErrorSchema.php b/src/DataTransferObjects/Schemas/ErrorSchema.php
index 7ad201be..6f340150 100644
--- a/src/DataTransferObjects/Schemas/ErrorSchema.php
+++ b/src/DataTransferObjects/Schemas/ErrorSchema.php
@@ -10,5 +10,5 @@ class ErrorSchema extends DataTransferObject
 
     public string $message;
 
-    public string $details;
+    public ?string $details;
 }
diff --git a/tests/Unit/AmznSPAHttpTest.php b/tests/Unit/AmznSPAHttpTest.php
index 982b12ce..3c05820a 100644
--- a/tests/Unit/AmznSPAHttpTest.php
+++ b/tests/Unit/AmznSPAHttpTest.php
@@ -189,8 +189,6 @@ public function testInvalidInputResponseReturned()
      */
     public function testSetupHttp()
     {
-        $this->expectException(RequestException::class);
-
         $config = new AmznSPAConfig(
             marketplace_id: MarketplacesList::allIdentifiers()[rand(0, 15)],
             application_id: Str::random(),
@@ -204,6 +202,8 @@ public function testSetupHttp()
         );
 
         $amzn = new AmznSPA($config);
-        $amzn->notifications->getSubscription('ANY_OFFER_CHANGED');
+        $response = $amzn->notifications->getSubscription('ANY_OFFER_CHANGED');
+
+        $this->assertEquals('InvalidInput', $response->errors->first()->code);
     }
 }
diff --git a/tests/Unit/DataTransferObjects/Responses/Notifications/GetSubscriptionResponseTest.php b/tests/Unit/DataTransferObjects/Responses/Notifications/GetSubscriptionResponseTest.php
index c5511c3d..e1b765cc 100644
--- a/tests/Unit/DataTransferObjects/Responses/Notifications/GetSubscriptionResponseTest.php
+++ b/tests/Unit/DataTransferObjects/Responses/Notifications/GetSubscriptionResponseTest.php
@@ -27,7 +27,7 @@ public function testSetupClass()
         $destination_id = Str::random();
 
         $dto = new GetSubscriptionResponse(
-            error_list: [
+            errors: [
                 [
                     'code' => $error_code,
                     'message' => $error_message,
@@ -41,8 +41,8 @@ public function testSetupClass()
             ])
         );
 
-        $this->assertInstanceOf(ErrorListSchema::class, $dto->error_list);
-        $error_schema = $dto->error_list->first();
+        $this->assertInstanceOf(ErrorListSchema::class, $dto->errors);
+        $error_schema = $dto->errors->first();
         $this->assertInstanceOf(ErrorSchema::class, $error_schema);
         /** @var ErrorSchema $error_schema */
         $this->assertEquals($error_code, $error_schema->code);
diff --git a/tests/Unit/DataTransferObjects/Schemas/ErrorListSchemaTest.php b/tests/Unit/DataTransferObjects/Schemas/ErrorListSchemaTest.php
index a496b373..a40c3e36 100644
--- a/tests/Unit/DataTransferObjects/Schemas/ErrorListSchemaTest.php
+++ b/tests/Unit/DataTransferObjects/Schemas/ErrorListSchemaTest.php
@@ -13,7 +13,7 @@ public function testErrorPassingBadData()
         $this->expectException(TypeError::class);
 
         new GetSubscriptionResponse(
-            error_list: [
+            errors: [
                 ['test' => 'test'],
             ],
         );