diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b725ee3..9ffcefd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+    - name: Install LLVM and Clang
+      uses: KyleMayes/install-llvm-action@v2
+      with:
+        version: "16"
+    - name: Prepare
+      run: make prepare
     - name: Build
       run: make build
     - name: Run tests
diff --git a/contracts/commitment-lock/README.md b/contracts/commitment-lock/README.md
index c5f097b..22f49be 100644
--- a/contracts/commitment-lock/README.md
+++ b/contracts/commitment-lock/README.md
@@ -18,7 +18,7 @@ The lock script args is the hash result of blake160(local_delay_epoch || local_d
 - `signature`: 65 bytes, the signature of the xxx_pubkey
 - `preimage`: 32 bytes, an optional field to provide the preimage of the payment_hash
 
-To know more about the transaction building process, please refer to the `test_commitment_lock` unit test.
+To know more about the transaction building process, please refer to the `test_commitment_lock_no_pending_htlcs` and `test_commitment_lock_with_two_pending_htlcs` unit test.
 
 *This contract was bootstrapped with [ckb-script-templates].*