diff --git a/executorlib/interactive/dependency.py b/executorlib/interactive/dependency.py
index fe821bab..5f27ff4a 100644
--- a/executorlib/interactive/dependency.py
+++ b/executorlib/interactive/dependency.py
@@ -181,6 +181,8 @@ def __exit__(
                 edge_lst=edge_lst,
                 filename=self._plot_dependency_graph_filename,
             )
+        else:
+            return None
 
 
 def _execute_tasks_with_dependencies(