diff --git a/backend/geonature/tests/imports/jsonschema_definitions.py b/backend/geonature/tests/imports/jsonschema_definitions.py
index 9067bece70..f01b4dccf6 100644
--- a/backend/geonature/tests/imports/jsonschema_definitions.py
+++ b/backend/geonature/tests/imports/jsonschema_definitions.py
@@ -24,10 +24,16 @@
                 "type": "string",
             },
             "eng_label": {
-                "type": "string",
+                "type": [
+                    "string",
+                    "null",
+                ],
             },
             "desc_field": {
-                "type": "string",
+                "type": [
+                    "string",
+                    "null",
+                ],
             },
             "type_field": {
                 "type": "string",