diff --git a/superset/databases/api.py b/superset/databases/api.py
index a8de0b66d2b50..c97127bcf7d94 100644
--- a/superset/databases/api.py
+++ b/superset/databases/api.py
@@ -551,7 +551,7 @@ def schemas(self, pk: int, **kwargs: Any) -> FlaskResponse:
         try:
             schemas = database.get_all_schema_names(
                 cache=database.schema_cache_enabled,
-                cache_timeout=database.schema_cache_timeout,
+                cache_timeout=database.schema_cache_timeout or None,
                 force=kwargs["rison"].get("force", False),
             )
             schemas = security_manager.get_schemas_accessible_by_user(database, schemas)