diff --git a/swh/storage/cassandra/storage.py b/swh/storage/cassandra/storage.py
--- a/swh/storage/cassandra/storage.py
+++ b/swh/storage/cassandra/storage.py
@@ -228,6 +228,7 @@
             if counter >= limit:
                 next_page_token = str(tok)
                 break
+            row_d["ctime"] = row.ctime.replace(tzinfo=datetime.timezone.utc)
             contents.append(Content(**row_d))
 
         assert len(contents) <= limit
diff --git a/swh/storage/tests/storage_tests.py b/swh/storage/tests/storage_tests.py
--- a/swh/storage/tests/storage_tests.py
+++ b/swh/storage/tests/storage_tests.py
@@ -2981,6 +2981,8 @@
 
         actually_present = swh_storage.content_find({"sha1": content.sha1})
         assert actually_present[0] == content
+        assert actually_present[0].ctime is not None
+        assert actually_present[0].ctime.tzinfo is not None
 
     def test_content_find_with_present_content(self, swh_storage, sample_data):
         content = sample_data.content