diff --git a/beacon_node/beacon_chain/src/schema_change/migration_schema_v20.rs b/beacon_node/beacon_chain/src/schema_change/migration_schema_v20.rs
index 737fcd0a93..5054c568bd 100644
--- a/beacon_node/beacon_chain/src/schema_change/migration_schema_v20.rs
+++ b/beacon_node/beacon_chain/src/schema_change/migration_schema_v20.rs
@@ -3,6 +3,7 @@ use operation_pool::{
     PersistedOperationPool, PersistedOperationPoolV15, PersistedOperationPoolV20,
 };
 use slog::{debug, info, Logger};
+use ssz::Encode;
 use std::sync::Arc;
 use store::{Error, HotColdDB, KeyValueStoreOp, StoreItem};
 use types::Attestation;
@@ -11,6 +12,7 @@ pub fn upgrade_to_v20<T: BeaconChainTypes>(
     db: Arc<HotColdDB<T::EthSpec, T::HotStore, T::ColdStore>>,
     log: Logger,
 ) -> Result<Vec<KeyValueStoreOp>, Error> {
+    info!(log, "Upgrading from v19 to v20");
     // Load a V15 op pool and transform it to V20.
     let Some(PersistedOperationPoolV15::<T::EthSpec> {
         attestations_v15,
@@ -36,7 +38,7 @@ pub fn upgrade_to_v20<T: BeaconChainTypes>(
         .map(|slashing| slashing.into())
         .collect();
 
-    let v20 = PersistedOperationPool::V20(PersistedOperationPoolV20 {
+    let v20 = PersistedOperationPoolV20 {
         attestations,
         sync_contributions,
         attester_slashings,
@@ -44,14 +46,20 @@ pub fn upgrade_to_v20<T: BeaconChainTypes>(
         voluntary_exits,
         bls_to_execution_changes,
         capella_bls_change_broadcast_indices,
-    });
-    Ok(vec![v20.as_kv_store_op(OP_POOL_DB_KEY)])
+    };
+    let v20_bytes = v20.as_ssz_bytes();
+    let wrapped = PersistedOperationPool::V20(v20);
+    let wrapped_bytes = wrapped.as_ssz_bytes();
+    assert_eq!(v20_bytes.len(), wrapped_bytes.len());
+    assert_eq!(v20_bytes, wrapped_bytes);
+    Ok(vec![wrapped.as_kv_store_op(OP_POOL_DB_KEY)])
 }
 
 pub fn downgrade_from_v20<T: BeaconChainTypes>(
     db: Arc<HotColdDB<T::EthSpec, T::HotStore, T::ColdStore>>,
     log: Logger,
 ) -> Result<Vec<KeyValueStoreOp>, Error> {
+    info!(log, "Downgrading from v20 to v19");
     // Load a V20 op pool and transform it to V15.
     let Some(PersistedOperationPoolV20::<T::EthSpec> {
         attestations,
diff --git a/beacon_node/operation_pool/src/persistence.rs b/beacon_node/operation_pool/src/persistence.rs
index 79509e5f6c..42f1cf078b 100644
--- a/beacon_node/operation_pool/src/persistence.rs
+++ b/beacon_node/operation_pool/src/persistence.rs
@@ -246,7 +246,7 @@ impl<E: EthSpec> StoreItem for PersistedOperationPoolV20<E> {
     }
 }
 
-/// Deserialization for `PersistedOperationPool` defaults to `PersistedOperationPool::V12`.
+/// Deserialization for `PersistedOperationPool` defaults to `PersistedOperationPool::V20`.
 impl<E: EthSpec> StoreItem for PersistedOperationPool<E> {
     fn db_column() -> DBColumn {
         DBColumn::OpPool