diff --git a/tests/validators/test_union.py b/tests/validators/test_union.py
index fe9914110..3a1884f3f 100644
--- a/tests/validators/test_union.py
+++ b/tests/validators/test_union.py
@@ -797,6 +797,7 @@ class ModelA:
         }
     )
 
-    # should raise ValidationError for Literal check, not TypeError
+    # validation against Literal[True] fails bc of the unhashable dict
+    # A ValidationError is raised, not a ValueError, which allows the validation against the union to continue
     assert validator.validate_python({'a': 42})
     assert validator.validate_python(True)