diff --git a/tests/test_elements_worker/test_classifications.py b/tests/test_elements_worker/test_classifications.py
index 738de363046afc4582a2fd1cd448912fb306f387..289af78bd67041773f993244ab7c4b60c67fbc4c 100644
--- a/tests/test_elements_worker/test_classifications.py
+++ b/tests/test_elements_worker/test_classifications.py
@@ -10,6 +10,8 @@ from arkindex_worker.models import Element
 
 from . import BASE_API_CALLS
 
+# Special string used to know if the `arg_name` passed in
+# `pytest.mark.parametrize` should be removed from the payload
 DELETE_PARAMETER = "DELETE_PARAMETER"