diff --git a/test/unit/app/tools/test_populate_state.py b/test/unit/app/tools/test_populate_state.py
index 68504d3303a0..b258e70fc3c7 100644
--- a/test/unit/app/tools/test_populate_state.py
+++ b/test/unit/app/tools/test_populate_state.py
@@ -74,6 +74,6 @@ def test_boolean_validation(self):
         source_file_name = functional_test_tool_path("parameters/gx_data_column.xml")
         tool = self._init_tool_for_path(source_file_name)
         incoming = {"ref_parameter": {"src": "hda", "id": 89}, "parameter": "m89"}
-        state_new = {}
-        errors = {}
+        state_new: Dict[str, Any] = {}
+        errors: Dict[str, Any] = {}
         populate_state(self.trans, tool.inputs, incoming, state_new, errors=errors, check=True, input_format="21.01")