diff --git a/test/integration_test.py b/test/integration_test.py
index 760d8d755..644240547 100644
--- a/test/integration_test.py
+++ b/test/integration_test.py
@@ -312,6 +312,8 @@ def _list_partition_bundles(self,
             # full-scale deployments, the desired maximum partition size is 8192.
             # We don't verify/enforce those limits here because the prefixes are
             # computed heuristically.
+            # FIXME: Track partition sizes via CloudWatch
+            #        https://github.com/DataBiosphere/azul/issues/6564
             if fqids:
                 return source, partition_prefix, fqids
         assert False, 'All partitions were empty'