diff --git a/test/collection/test_validator.py b/test/collection/test_validator.py
index 1f97548b1..6c7e655c5 100644
--- a/test/collection/test_validator.py
+++ b/test/collection/test_validator.py
@@ -14,6 +14,7 @@
     [
         (1, [int], False),
         (1.0, [int], True),
+        (True, [int], True),
         ([1, 1], [List], False),
         (np.array([1, 2, 3]), [_ExtraTypes.NUMPY], False),
         (np.array([1, 2, 3]), [_ExtraTypes.NUMPY, List], False),
diff --git a/weaviate/validator.py b/weaviate/validator.py
index 7fe11945c..e9d411dae 100644
--- a/weaviate/validator.py
+++ b/weaviate/validator.py
@@ -59,4 +59,8 @@ def _is_valid(expected: Any, value: Any) -> bool:
                 return any(isinstance(val, union_arg) for val in value for union_arg in union_args)
             else:
                 return all(isinstance(val, args[0]) for val in value)
+    # bool is a subclass of int, so isinstance(True, int) is True. Reject a
+    # bool where a plain int is expected so it is not silently coerced to 0/1.
+    if expected is int and isinstance(value, bool):
+        return False
     return isinstance(value, expected)