diff --git a/src/openforms/formio/tests/validation/test_file.py b/src/openforms/formio/tests/validation/test_file.py
index c656687d5f..61470f6696 100644
--- a/src/openforms/formio/tests/validation/test_file.py
+++ b/src/openforms/formio/tests/validation/test_file.py
@@ -602,10 +602,10 @@ def test_attach_upload_validates_unknown_file_type(self):
         }
 
         is_valid, errors = validate_formio_data(component, data, submission=submission)
-        error = extract_error(errors["foo"][0], "type")
+        error = extract_error(errors["foo"][0], "non_field_errors")
 
         self.assertFalse(is_valid)
-        self.assertEqual(error.code, "blank")
+        self.assertEqual(error.code, "invalid")
         self.assertEqual(
             error,
             _(