diff --git a/src/testing/WormholeRelayer/DeliveryInstructionDecoder.sol b/src/testing/WormholeRelayer/DeliveryInstructionSerde.sol
similarity index 87%
rename from src/testing/WormholeRelayer/DeliveryInstructionDecoder.sol
rename to src/testing/WormholeRelayer/DeliveryInstructionSerde.sol
index 5caf71d..f9dd02c 100644
--- a/src/testing/WormholeRelayer/DeliveryInstructionDecoder.sol
+++ b/src/testing/WormholeRelayer/DeliveryInstructionSerde.sol
@@ -42,6 +42,30 @@ struct DeliveryOverride {
   bytes32 redeliveryHash;
 }
 
+function encode(DeliveryInstruction memory strct)
+  pure
+  returns (bytes memory encoded)
+{
+  encoded = abi.encodePacked(
+    PAYLOAD_ID_DELIVERY_INSTRUCTION,
+    strct.targetChain,
+    strct.targetAddress,
+    encodeBytes(strct.payload),
+    strct.requestedReceiverValue,
+    strct.extraReceiverValue
+  );
+  encoded = abi.encodePacked(
+    encoded,
+    encodeBytes(strct.encodedExecutionInfo),
+    strct.refundChain,
+    strct.refundAddress,
+    strct.refundDeliveryProvider,
+    strct.sourceDeliveryProvider,
+    strct.senderAddress,
+    encodeMessageKeyArray(strct.messageKeys)
+  );
+}
+
 function decodeDeliveryInstruction(
   bytes memory encoded
 ) pure returns (DeliveryInstruction memory strct) {
@@ -63,6 +87,22 @@ function decodeDeliveryInstruction(
   encoded.checkLength(offset);
 }
 
+function encode(RedeliveryInstruction memory strct)
+  pure
+  returns (bytes memory encoded)
+{
+  bytes memory vaaKey = abi.encodePacked(VAA_KEY_TYPE, encodeVaaKey(strct.deliveryVaaKey));
+  encoded = abi.encodePacked(
+    PAYLOAD_ID_REDELIVERY_INSTRUCTION,
+    vaaKey,
+    strct.targetChain,
+    strct.newRequestedReceiverValue,
+    encodeBytes(strct.newEncodedExecutionInfo),
+    strct.newSourceDeliveryProvider,
+    strct.newSenderAddress
+  );
+}
+
 function decodeRedeliveryInstruction(
   bytes memory encoded
 ) pure returns (RedeliveryInstruction memory strct) {
diff --git a/src/testing/WormholeRelayer/MockOffchainRelayer.sol b/src/testing/WormholeRelayer/MockOffchainRelayer.sol
index 75c9469..68abfc7 100644
--- a/src/testing/WormholeRelayer/MockOffchainRelayer.sol
+++ b/src/testing/WormholeRelayer/MockOffchainRelayer.sol
@@ -14,7 +14,7 @@ import {CCTPMessageLib} from "wormhole-sdk/WormholeRelayer/CCTPBase.sol";
 import {VM_ADDRESS} from "wormhole-sdk/testing/Constants.sol";
 import "wormhole-sdk/testing/WormholeOverride.sol";
 import "wormhole-sdk/testing/CctpOverride.sol";
-import "wormhole-sdk/testing/WormholeRelayer/DeliveryInstructionDecoder.sol";
+import "wormhole-sdk/testing/WormholeRelayer/DeliveryInstructionSerde.sol";
 import "wormhole-sdk/testing/WormholeRelayer/ExecutionParameters.sol";
 
 using BytesParsing for bytes;
diff --git a/src/testing/WormholeRelayerTest.sol b/src/testing/WormholeRelayerTest.sol
index 5f7613d..7ced3d4 100644
--- a/src/testing/WormholeRelayerTest.sol
+++ b/src/testing/WormholeRelayerTest.sol
@@ -15,7 +15,7 @@ import "./UsdcDealer.sol";
 import "./WormholeOverride.sol";
 import "./CctpOverride.sol";
 import "./ERC20Mock.sol";
-import "./WormholeRelayer/DeliveryInstructionDecoder.sol";
+import "./WormholeRelayer/DeliveryInstructionSerde.sol";
 import "./WormholeRelayer/ExecutionParameters.sol";
 import "./WormholeRelayer/MockOffchainRelayer.sol";