diff --git a/tests/core/pyspec/eth2spec/test/altair/block_processing/test_process_sync_aggregate.py b/tests/core/pyspec/eth2spec/test/altair/block_processing/test_process_sync_aggregate.py
index fe847b741..1228136ac 100644
--- a/tests/core/pyspec/eth2spec/test/altair/block_processing/test_process_sync_aggregate.py
+++ b/tests/core/pyspec/eth2spec/test/altair/block_processing/test_process_sync_aggregate.py
@@ -80,7 +80,7 @@ def test_invalid_signature_bad_domain(spec, state):
             state,
             block.slot - 1,
             committee_indices,  # full committee signs
-            domain_type=spec.DOMAIN_BEACON_ATTESTER,
+            domain_type=spec.DOMAIN_BEACON_ATTESTER,  # Incorrect domain
         )
     )
     yield from run_sync_committee_processing(spec, state, block, expect_exception=True)