diff --git a/tests/test_rss_proceedings.py b/tests/test_rss_proceedings.py
index 3bdeba0..aff843c 100644
--- a/tests/test_rss_proceedings.py
+++ b/tests/test_rss_proceedings.py
@@ -146,7 +146,7 @@ class RssProceedingsTests(unittest.TestCase):
         with tempfile.TemporaryDirectory() as tmp:
             root = Path(tmp)
             original = self.paper()
-            dblp = {**original, 'source': 'dblp', 'external_id': 'conf/rss/example', 'metadata': {}}
+            dblp = {**original, 'source': 'dblp', 'external_id': 'conf/rss/example', 'metadata': {}, 'tags': []}
             variant = {**original, 'external_id': '2025/other-track', 'track': 'workshop'}
             for n, record in enumerate([dblp, original, variant, original]):
                 path = root/f'{n}.jsonl'