diff --git a/sdk/python/validation/models.py b/sdk/python/validation/models.py
index cbc23134..dad60ea6 100644
--- a/sdk/python/validation/models.py
+++ b/sdk/python/validation/models.py
@@ -4,6 +4,7 @@
 
 from dataclasses import dataclass
 from pathlib import Path
+from typing import Optional
 
 
 @dataclass
@@ -35,5 +36,5 @@ class RunResult:
 class SingleResult:
     """Result of running one example with one model (single-run mode)."""
 
-    example: Example = None  # type: ignore[assignment]
-    result: RunResult = None  # type: ignore[assignment]
+    example: Optional[Example] = None
+    result: Optional[RunResult] = None