diff --git a/userCode/main.py b/userCode/main.py
index 17b96de0..28bfbedc 100644
--- a/userCode/main.py
+++ b/userCode/main.py
@@ -92,6 +92,11 @@ def gleaner_config(context: AssetExecutionContext):
 
     sources = []
     names = set()
+
+    assert (
+        len(Lines) > 0
+    ), f"No sitemaps found in sitemap index {REMOTE_GLEANER_SITEMAP}"
+
     for line in Lines:
         basename = REMOTE_GLEANER_SITEMAP.removesuffix(".xml")
         name = (
diff --git a/userCode/test/test_e2e.py b/userCode/test/test_e2e.py
index dc08560c..d27326fc 100644
--- a/userCode/test/test_e2e.py
+++ b/userCode/test/test_e2e.py
@@ -10,7 +10,7 @@
 from dagster import AssetsDefinition, AssetSpec, SourceAsset
 
 
-def test_materialize_configs():
+def test_materialize_ref_hu02():
     instance = DagsterInstance.ephemeral()
 
     assets = load_assets_from_modules([main])
@@ -34,10 +34,10 @@ def test_materialize_configs():
     all_partitions = sources_partitions_def.get_partition_keys(
         dynamic_partitions_store=instance
     )
-    assert len(all_partitions) > 0
+    assert len(all_partitions) > 0, "Partitions were not generated"
 
     result = resolved_job.execute_in_process(
         instance=instance, partition_key="ref_hu02_hu02__0"
     )
 
-    assert result.success
+    assert result.success, "Job execution failed for partition 'ref_hu02_hu02__0'"