diff --git a/libs/ragstack-ai-llamaindex/ragstack_ai_llamaindex/__init__.py b/libs/ragstack-ai-llamaindex/ragstack_ai_llamaindex/__init__.py
index 90fca6dd0..205633a03 100644
--- a/libs/ragstack-ai-llamaindex/ragstack_ai_llamaindex/__init__.py
+++ b/libs/ragstack-ai-llamaindex/ragstack_ai_llamaindex/__init__.py
@@ -11,7 +11,7 @@
 
 
 # LlamaHub is disabled while using RAGStack AI, because it would download unknown software from the Internet.
-def disabled_download_loader():
+def disabled_download_loader(*args, **kwargs):
     raise ImportError(
         "LlamaHub is disabled while using RAGStack AI, because it would download unknown software from the Internet.")
 
diff --git a/libs/ragstack-ai-llamaindex/tests/test_ragstack_llamaindex.py b/libs/ragstack-ai-llamaindex/tests/test_ragstack_llamaindex.py
index 3247f6bfb..fab6bbcfe 100644
--- a/libs/ragstack-ai-llamaindex/tests/test_ragstack_llamaindex.py
+++ b/libs/ragstack-ai-llamaindex/tests/test_ragstack_llamaindex.py
@@ -1,5 +1,20 @@
+import pytest
+
+
 def test_import():
     from ragstack_ai_llamaindex import __version__  # noqa
     from llama_index.vector_stores import AstraDBVectorStore, CassandraVectorStore  # noqa
     import astrapy  # noqa
     import cassio  # noqa
+
+
+def test_dont_download():
+    # TODO: if you don't have the llama_index package installed, this test will fail because the monkey patch is not
+    #  executed
+    from ragstack_ai_llamaindex import __version__
+    from llama_index import download_loader
+    try:
+        download_loader("PDFReader")
+        pytest.fail("Should have raised an ImportError")
+    except ImportError as error:
+        assert "LlamaHub is disabled while using RAGStack AI" in str(error)