diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 5ef868431..094839bf6 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -2,19 +2,19 @@ name: Format sourcecode
 on:
   push:
     paths:
-    - '.github/workflows/format.yml'
-    - 'src/**.c'
-    - 'src/**.h'
-    - 'src/rust/**'
+      - ".github/workflows/format.yml"
+      - "src/**.c"
+      - "src/**.h"
+      - "src/rust/**"
     tags-ignore: # ignore push via new tag
-    - '*.*'
+      - "*.*"
   pull_request:
     types: [opened, synchronize, reopened]
     paths:
-    - '.github/workflows/format.yml'
-    - 'src/**.c'
-    - 'src/**.h'
-    - 'src/rust/**'
+      - ".github/workflows/format.yml"
+      - "src/**.c"
+      - "src/**.h"
+      - "src/rust/**"
 jobs:
   format:
     runs-on: ubuntu-latest
@@ -31,7 +31,7 @@ jobs:
         working-directory: ./src/rust
     steps:
       - uses: actions/checkout@v4
-      - name: cache 
+      - name: cache
         uses: actions/cache@v4
         with:
           path: |
@@ -58,19 +58,23 @@ jobs:
       - name: Install dependencies
         run: sudo apt update && sudo apt-get install libgpac-dev
       - uses: actions/checkout@v4
-      - name: cache 
+      - name: cache
         uses: actions/cache@v4
         with:
           path: |
             src/rust/.cargo/registry
             src/rust/.cargo/git
             src/rust/target
+            src/rust/lib_ccxr/target
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: ${{ runner.os }}-cargo-
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
           override: true
-      - name: build
-        run: cargo test 
+      - name: Build and test main module
+        run: cargo test
         working-directory: ./src/rust
+      - name: Build and test lib_ccxr
+        run: cargo test
+        working-directory: ./src/rust/lib_ccxr