diff --git a/nwb_linkml/src/nwb_linkml/includes/hdmf.py b/nwb_linkml/src/nwb_linkml/includes/hdmf.py
index 7fa3c08..19bbf34 100644
--- a/nwb_linkml/src/nwb_linkml/includes/hdmf.py
+++ b/nwb_linkml/src/nwb_linkml/includes/hdmf.py
@@ -909,4 +909,6 @@ if "pytest" in sys.modules:
         pass
 
     class TimeSeriesReferenceVectorData(TimeSeriesReferenceVectorDataMixin):
+        """TimeSeriesReferenceVectorData subclass for testing"""
+
         pass