diff --git a/specs/deneb/beacon-chain.md b/specs/deneb/beacon-chain.md
index b98ac1259..852f98308 100644
--- a/specs/deneb/beacon-chain.md
+++ b/specs/deneb/beacon-chain.md
@@ -77,7 +77,6 @@ Deneb is a consensus-layer upgrade containing a number of features. Including:
 
 | Name | Value |
 | - | - |
-| `BLOB_TX_TYPE` | `uint8(0x03)` |
 | `VERSIONED_HASH_VERSION_KZG` | `Bytes1('0x01')` |
 
 ## Preset
diff --git a/specs/deneb/p2p-interface.md b/specs/deneb/p2p-interface.md
index 586c909e4..2cfdcde74 100644
--- a/specs/deneb/p2p-interface.md
+++ b/specs/deneb/p2p-interface.md
@@ -165,6 +165,7 @@ The following validations MUST pass before forwarding the `blob_sidecar` on the
 - _[IGNORE]_ The sidecar's block's parent (defined by `block_header.parent_root`) has been seen (via both gossip and non-gossip sources) (a client MAY queue sidecars for processing once the parent block is retrieved).
 - _[REJECT]_ The sidecar's block's parent (defined by `block_header.parent_root`) passes validation.
 - _[REJECT]_ The sidecar is from a higher slot than the sidecar's block's parent (defined by `block_header.parent_root`).
+- _[REJECT]_ The current finalized_checkpoint is an ancestor of the sidecar's block's parent -- i.e. `get_checkpoint_block(store, sidecar.block_parent_root, store.finalized_checkpoint.epoch) == store.finalized_checkpoint.root`.
 - _[REJECT]_ The proposer signature of `blob_sidecar.signed_block_header`, is valid with respect to the `block_header.proposer_index` pubkey.
 - _[REJECT]_ The sidecar's inclusion proof is valid as verified by `verify_blob_sidecar_inclusion_proof`.
 - _[REJECT]_ The sidecar's blob is valid as verified by `verify_blob_kzg_proof(blob_sidecar.blob, blob_sidecar.kzg_commitment, blob_sidecar.kzg_proof)`.
diff --git a/specs/deneb/validator.md b/specs/deneb/validator.md
index cb87e1322..3dc2e90f0 100644
--- a/specs/deneb/validator.md
+++ b/specs/deneb/validator.md
@@ -128,10 +128,8 @@ def prepare_execution_payload(state: BeaconState,
 
 *[New in Deneb:EIP4844]*
 
-1. After retrieving the execution payload from the execution engine as specified above,
-use the `payload_id` to retrieve `blobs`, `blob_kzg_commitments`, and `blob_kzg_proofs`
-via `get_payload(payload_id).blobs_bundle`.
-2. Set `block.body.blob_kzg_commitments = blob_kzg_commitments`.
+1. The execution payload is obtained from the execution engine as defined above using `payload_id`. The response also includes a `blobs_bundle` entry containing the corresponding `blobs`, `commitments`, and `proofs`.
+2. Set `block.body.blob_kzg_commitments = commitments`.
 
 #### Constructing the `BlobSidecar`s
 
diff --git a/tests/core/pyspec/eth2spec/test/helpers/sharding.py b/tests/core/pyspec/eth2spec/test/helpers/sharding.py
index 25b4dea59..c06b1aa9c 100644
--- a/tests/core/pyspec/eth2spec/test/helpers/sharding.py
+++ b/tests/core/pyspec/eth2spec/test/helpers/sharding.py
@@ -7,6 +7,7 @@ from eth2spec.utils.ssz.ssz_typing import (
     Union,
     boolean,
     uint256, uint64,
+    uint8,
 )
 from eth2spec.utils.ssz.ssz_impl import serialize
 
@@ -20,6 +21,9 @@ MAX_ACCESS_LIST_STORAGE_KEYS = 2**24
 MAX_ACCESS_LIST_SIZE = 2**24
 
 
+BLOB_TX_TYPE = uint8(0x03)
+
+
 class AccessTuple(Container):
     address: Bytes20  # Address = Bytes20
     storage_keys: List[Bytes32, MAX_ACCESS_LIST_STORAGE_KEYS]
@@ -120,5 +124,5 @@ def get_sample_opaque_tx(spec, blob_count=1, rng=random.Random(5566), is_valid_b
         )
     )
     serialized_tx = serialize(signed_blob_tx)
-    opaque_tx = spec.uint_to_bytes(spec.BLOB_TX_TYPE) + serialized_tx
+    opaque_tx = spec.uint_to_bytes(BLOB_TX_TYPE) + serialized_tx
     return opaque_tx, blobs, blob_kzg_commitments, blob_kzg_proofs