diff --git a/.github/workflows/bytecode-analysis.yml b/.github/workflows/bytecode-analysis.yml
index a89c7dfa8b8..5f1ee2a3f55 100644
--- a/.github/workflows/bytecode-analysis.yml
+++ b/.github/workflows/bytecode-analysis.yml
@@ -2,6 +2,8 @@ name: Check Bytecode Changes
 
 on:
   pull_request:
+    branches:
+      - main
     paths:
       - 'solidity/**'
       - '.github/workflows/bytecode-analysis.yml'
diff --git a/solidity/contracts/Mailbox.sol b/solidity/contracts/Mailbox.sol
index cc0b55865d4..d84865c7ae3 100644
--- a/solidity/contracts/Mailbox.sol
+++ b/solidity/contracts/Mailbox.sol
@@ -31,6 +31,9 @@ contract Mailbox is
 
     // ============ Constants ============
 
+    // Test constant for bytecode check CI test - DELETE ME
+    uint256 public constant TEST_BYTECODE_CHANGE = 12345;
+
     // Domain of chain on which the contract is deployed
     uint32 public immutable localDomain;
 
diff --git a/solidity/foundry.toml b/solidity/foundry.toml
index 21e9804eecc..905b6641568 100644
--- a/solidity/foundry.toml
+++ b/solidity/foundry.toml
@@ -19,6 +19,7 @@ ignored_warnings_from = ['lib', 'test', 'contracts/test']
 verbosity = 4
 # disable metadata for bytecode comparison
 cbor_metadata = false
+bytecode_hash = "none"
 
 [rpc_endpoints]
 mainnet = "${RPC_URL_MAINNET}"