diff --git a/tests/laborious/utils/repository/test_model_repository.py b/tests/laborious/utils/repository/test_model_repository.py
index 5dab80d..cdc59b4 100644
--- a/tests/laborious/utils/repository/test_model_repository.py
+++ b/tests/laborious/utils/repository/test_model_repository.py
@@ -33,6 +33,10 @@ metadata = {
 }
 
 
+class Any:
+    pass
+
+
 invalid_cases = [
     (
         {
@@ -53,8 +57,8 @@ invalid_cases = [
     (
         {
             'value': {
-                1: 1,
-                2: 2
+                Any(): 1,
+                Any(): 2
             }
         }
     )