diff --git a/src/trudex/application/bot/admin_dialogs/templates.py b/src/trudex/application/bot/admin_dialogs/templates.py
index 644ab3a..f8aa8ab 100644
--- a/src/trudex/application/bot/admin_dialogs/templates.py
+++ b/src/trudex/application/bot/admin_dialogs/templates.py
@@ -349,6 +349,9 @@ async def on_import_file(
     result = parser.parse(json_str)
     
     if isinstance(result, list):
+        if not result:
+            await message.answer("❌ Неизвестная ошибка валидации")
+            return
         error_lines = ["❌ <b>Ошибки валидации:</b>\n"]
         for err in result[:10]:
             path_str = f" (<code>{err.path}</code>)" if err.path else ""
diff --git a/src/trudex/application/bot/creator_dialogs/templates.py b/src/trudex/application/bot/creator_dialogs/templates.py
index b9dbc6c..599cae9 100644
--- a/src/trudex/application/bot/creator_dialogs/templates.py
+++ b/src/trudex/application/bot/creator_dialogs/templates.py
@@ -349,6 +349,9 @@ async def on_import_file(
     result = parser.parse(json_str)
     
     if isinstance(result, list):
+        if not result:
+            await message.answer("❌ Неизвестная ошибка валидации")
+            return
         error_lines = ["❌ <b>Ошибки валидации:</b>\n"]
         for err in result[:10]:
             path_str = f" (<code>{err.path}</code>)" if err.path else ""
diff --git a/src/trudex/domain/test_parser.py b/src/trudex/domain/test_parser.py
index 682c786..b7524fb 100644
--- a/src/trudex/domain/test_parser.py
+++ b/src/trudex/domain/test_parser.py
@@ -80,7 +80,8 @@ class TestParser:
         max_length: int | None = None,
         errors: list[ParseError] | None = None,
     ) -> str | None:
-        errors = errors or []
+        if errors is None:
+            errors = []
         value = data.get(key)
         
         if value is None:
@@ -112,7 +113,8 @@ class TestParser:
         max_val: int | None = None,
         errors: list[ParseError] | None = None,
     ) -> int | None:
-        errors = errors or []
+        if errors is None:
+            errors = []
         value = data.get(key)
         
         if value is None:
@@ -141,7 +143,8 @@ class TestParser:
         required: bool,
         errors: list[ParseError] | None = None,
     ) -> datetime | None:
-        errors = errors or []
+        if errors is None:
+            errors = []
         value = data.get(key)
         
         if value is None: