diff --git a/lib/src/definitions/validation/thing_description_schema.dart b/lib/src/definitions/validation/thing_description_schema.dart
index 4ad9994a..ae909443 100644
--- a/lib/src/definitions/validation/thing_description_schema.dart
+++ b/lib/src/definitions/validation/thing_description_schema.dart
@@ -28,7 +28,7 @@ class ThingDescriptionValidationException extends ValidationException {
   @override
   String toString() {
     return "ThingDescriptionValidationException: $message.\n\n"
-        'Errors:\n\n ${_validationErrors.join("\n\n")}';
+        'Errors:\n\n ${_validationErrors.join("\n")}';
   }
 }