diff --git a/openfga_sdk/models/check_error.py b/openfga_sdk/models/check_error.py
index 11a4a7b..54b2187 100644
--- a/openfga_sdk/models/check_error.py
+++ b/openfga_sdk/models/check_error.py
@@ -40,8 +40,8 @@ class CheckError:
     }
 
     attribute_map = {
-        "input_error": "inputError",
-        "internal_error": "internalError",
+        "input_error": "input_error",
+        "internal_error": "internal_error",
         "message": "message",
     }
 
diff --git a/test/client/client_test.py b/test/client/client_test.py
index 86b6e33..fa16fe7 100644
--- a/test/client/client_test.py
+++ b/test/client/client_test.py
@@ -2275,7 +2275,7 @@ async def test_batch_check_multiple_request(self, mock_request, mock_uuid):
     "result": {
         "fake-uuid": {
             "error": {
-                "inputError": "validation_error",
+                "input_error": "validation_error",
                 "message": "type 'doc' not found"
             }
         }
diff --git a/test/sync/client/client_test.py b/test/sync/client/client_test.py
index 03c682f..5d7ca86 100644
--- a/test/sync/client/client_test.py
+++ b/test/sync/client/client_test.py
@@ -2228,7 +2228,6 @@ def test_batch_check_single_request(self, mock_request):
             self.assertTrue(api_response.result[0].allowed)
             self.assertEqual(api_response.result[0].correlation_id, "1")
             self.assertEqual(api_response.result[0].request, body.checks[0])
-
             # Make sure the API was called with the right data
             mock_request.assert_any_call(
                 "POST",
@@ -2279,7 +2278,7 @@ def test_batch_check_multiple_request(self, mock_request, mock_uuid):
     "result": {
         "fake-uuid": {
             "error": {
-                "inputError": "validation_error",
+                "input_error": "validation_error",
                 "message": "type 'doc' not found"
             }
         }