diff --git a/tests/unit/test_protocol_validator.py b/tests/unit/test_protocol_validator.py
index d402433..cd5d67e 100644
--- a/tests/unit/test_protocol_validator.py
+++ b/tests/unit/test_protocol_validator.py
@@ -153,19 +153,19 @@ def test_feature_unknown_column_fails() -> None:
         validate_strategy(ast)
 
 
-def test_validator_accepts_temporal_features() -> None:
-    for name in ("hour", "dow", "is_weekend", "minute_of_hour"):
-        src = _wrap(
-            {
-                "op": "gt",
-                "args": [
-                    {"kind": "feature", "name": name},
-                    {"kind": "literal", "value": 0},
-                ],
-            }
-        )
-        ast = parse_strategy(src)
-        validate_strategy(ast)  # no exception
+@pytest.mark.parametrize("name", ["hour", "dow", "is_weekend", "minute_of_hour"])
+def test_validator_accepts_temporal_feature(name: str) -> None:
+    src = _wrap(
+        {
+            "op": "gt",
+            "args": [
+                {"kind": "feature", "name": name},
+                {"kind": "literal", "value": 0.0},
+            ],
+        }
+    )
+    ast = parse_strategy(src)
+    validate_strategy(ast)  # no exception
 
 
 def test_validator_rejects_temporal_typo() -> None:
@@ -174,7 +174,7 @@ def test_validator_rejects_temporal_typo() -> None:
             "op": "gt",
             "args": [
                 {"kind": "feature", "name": "weekday"},
-                {"kind": "literal", "value": 0},
+                {"kind": "literal", "value": 0.0},
             ],
         }
     )