diff --git a/tools/schemapi/tests/test_schemapi.py b/tools/schemapi/tests/test_schemapi.py
index d26b127fb..3dd93e4e2 100644
--- a/tools/schemapi/tests/test_schemapi.py
+++ b/tools/schemapi/tests/test_schemapi.py
@@ -461,7 +461,7 @@ def chart_example_invalid_y_option_value_with_condition():
 
 
 @pytest.mark.parametrize(
-    "chart_func,expected_error_message",
+    "chart_func, expected_error_message",
     [
         (
             chart_example_invalid_y_option,