diff --git a/tests/polymind/core/test_tool.py b/tests/polymind/core/test_tool.py
index 348d89d..3c60dfe 100644
--- a/tests/polymind/core/test_tool.py
+++ b/tests/polymind/core/test_tool.py
@@ -14,7 +14,7 @@
 
 
 class TestParam:
-    @pytest.mark.parametrize("type_str", ["str", "int", "float"])
+    @pytest.mark.parametrize("type_str", ["str", "int", "float", "bool"])
     def test_valid_simple_types(self, type_str):
         """Test that Param accepts valid simple type strings."""
         param = Param(