diff --git a/tests/test_benchmarks.py b/tests/test_benchmarks.py
index 8f157cc..1322a34 100644
--- a/tests/test_benchmarks.py
+++ b/tests/test_benchmarks.py
@@ -14,7 +14,8 @@ def __init__(self) -> None:
 
         @under_cached_property
         def prop(self) -> int:
-            return 42
+            """Return the value of the property."""
+            raise NotImplementedError
 
     t = Test()
 
@@ -33,7 +34,8 @@ def __init__(self) -> None:
 
         @cached_property
         def prop(self) -> int:
-            return 42
+            """Return the value of the property."""
+            raise NotImplementedError
 
     t = Test()