diff --git a/swh/storage/tests/test_kafka_writer.py b/swh/storage/tests/test_kafka_writer.py
--- a/swh/storage/tests/test_kafka_writer.py
+++ b/swh/storage/tests/test_kafka_writer.py
@@ -32,6 +32,7 @@
         method = getattr(storage, object_type + "_add")
         if object_type in (
             "content",
+            "skipped_content",
             "directory",
             "revision",
             "release",