Based on what I read you can use composer.json for cache key

Author: stefanak-michal

.github/workflows/static-analysis.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /tmp/composer-cache
-          key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-${{ hashFiles('**/composer.json') }}
 
       - name: Install dependencies
         run: composer install

.github/workflows/unit-test.yml

@@ -29,7 +29,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /tmp/composer-cache
-          key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
 
       - name: Install dependencies
         run: composer install