diff --git a/extern/sector-storage/ffiwrapper/sealer_test.go b/extern/sector-storage/ffiwrapper/sealer_test.go
index df657f097..4adec48cf 100644
--- a/extern/sector-storage/ffiwrapper/sealer_test.go
+++ b/extern/sector-storage/ffiwrapper/sealer_test.go
@@ -544,6 +544,7 @@ func TestSealAndVerifyAggregate(t *testing.T) {
 
 	avi.Proof, err = ProofProver.AggregateSealProofs(avi, toAggregate)
 	require.NoError(t, err)
+	require.Len(t, avi.Proof, 11188)
 
 	aggDone := time.Now()