diff --git a/crates/primitives/src/transaction/mod.rs b/crates/primitives/src/transaction/mod.rs
index b47f40cf78..acda972bf7 100644
--- a/crates/primitives/src/transaction/mod.rs
+++ b/crates/primitives/src/transaction/mod.rs
@@ -1510,4 +1510,20 @@ mod tests {
         let decoded = TransactionSignedEcRecovered::decode(&mut &encoded[..]).unwrap();
         assert_eq!(recovered, decoded)
     }
+
+    #[test]
+    fn test_decode_tx() {
+        // some random transactions pulled from hive tests
+        let s = "b86f02f86c0705843b9aca008506fc23ac00830124f89400000000000000000000000000000000000003160180c001a00293c713e2f1eab91c366621ff2f867e05ad7e99d4aa5d069aafeb9e1e8c9b6aa05ec6c0605ff20b57c90a6484ec3b0509e5923733d06f9b69bee9a2dabe4f1352";
+        let tx = TransactionSigned::decode(&mut &hex::decode(s).unwrap()[..]).unwrap();
+        let mut b = Vec::new();
+        tx.encode(&mut b);
+        assert_eq!(s, hex::encode(&b));
+
+        let s = "f865048506fc23ac00830124f8940000000000000000000000000000000000000316018032a06b8fdfdcb84790816b7af85b19305f493665fe8b4e7c51ffdd7cc144cd776a60a028a09ab55def7b8d6602ba1c97a0ebbafe64ffc9c8e89520cec97a8edfb2ebe9";
+        let tx = TransactionSigned::decode(&mut &hex::decode(s).unwrap()[..]).unwrap();
+        let mut b = Vec::new();
+        tx.encode(&mut b);
+        assert_eq!(s, hex::encode(&b));
+    }
 }
diff --git a/crates/rpc/rpc-types/src/eth/engine/payload.rs b/crates/rpc/rpc-types/src/eth/engine/payload.rs
index fcc4d94a78..111d0bad66 100644
--- a/crates/rpc/rpc-types/src/eth/engine/payload.rs
+++ b/crates/rpc/rpc-types/src/eth/engine/payload.rs
@@ -90,7 +90,7 @@ impl From<SealedBlock> for ExecutionPayload {
             .iter()
             .map(|tx| {
                 let mut encoded = Vec::new();
-                tx.encode(&mut encoded);
+                tx.encode_enveloped(&mut encoded);
                 encoded.into()
             })
             .collect();
@@ -523,4 +523,20 @@ mod tests {
         assert!(status.status.validation_error().is_none());
         assert_eq!(serde_json::to_string(&status).unwrap(), full);
     }
+
+    #[test]
+    fn serde_roundtrip_legacy_txs_payload() {
+        // pulled from hive tests
+        let s = r#"{"parentHash":"0x67ead97eb79b47a1638659942384143f36ed44275d4182799875ab5a87324055","feeRecipient":"0x0000000000000000000000000000000000000000","stateRoot":"0x0000000000000000000000000000000000000000000000000000000000000000","receiptsRoot":"0x4e3c608a9f2e129fccb91a1dae7472e78013b8e654bccc8d224ce3d63ae17006","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prevRandao":"0x44bb4b98c59dbb726f96ffceb5ee028dcbe35b9bba4f9ffd56aeebf8d1e4db62","blockNumber":"0x1","gasLimit":"0x2fefd8","gasUsed":"0xa860","timestamp":"0x1235","extraData":"0x8b726574682f76302e312e30","baseFeePerGas":"0x342770c0","blockHash":"0x5655011482546f16b2312ef18e9fad03d6a52b1be95401aea884b222477f9e64","transactions":["0xf865808506fc23ac00830124f8940000000000000000000000000000000000000316018032a044b25a8b9b247d01586b3d59c71728ff49c9b84928d9e7fa3377ead3b5570b5da03ceac696601ff7ee6f5fe8864e2998db9babdf5eeba1a0cd5b4d44b3fcbd181b"]}"#;
+        let payload: ExecutionPayload = serde_json::from_str(s).unwrap();
+        assert_eq!(serde_json::to_string(&payload).unwrap(), s);
+    }
+
+    #[test]
+    fn serde_roundtrip_enveloped_txs_payload() {
+        // pulled from hive tests
+        let s = r#"{"parentHash":"0x67ead97eb79b47a1638659942384143f36ed44275d4182799875ab5a87324055","feeRecipient":"0x0000000000000000000000000000000000000000","stateRoot":"0x76a03cbcb7adce07fd284c61e4fa31e5e786175cefac54a29e46ec8efa28ea41","receiptsRoot":"0x4e3c608a9f2e129fccb91a1dae7472e78013b8e654bccc8d224ce3d63ae17006","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prevRandao":"0x028111cb7d25918386a69656b3d17b2febe95fd0f11572c1a55c14f99fdfe3df","blockNumber":"0x1","gasLimit":"0x2fefd8","gasUsed":"0xa860","timestamp":"0x1235","extraData":"0x8b726574682f76302e312e30","baseFeePerGas":"0x342770c0","blockHash":"0xa6f40ed042e61e88e76125dede8fff8026751ea14454b68fb534cea99f2b2a77","transactions":["0xf865808506fc23ac00830124f8940000000000000000000000000000000000000316018032a044b25a8b9b247d01586b3d59c71728ff49c9b84928d9e7fa3377ead3b5570b5da03ceac696601ff7ee6f5fe8864e2998db9babdf5eeba1a0cd5b4d44b3fcbd181b"]}"#;
+        let payload: ExecutionPayload = serde_json::from_str(s).unwrap();
+        assert_eq!(serde_json::to_string(&payload).unwrap(), s);
+    }
 }