More tweaks.

.github/workflows/tests.yml

@@ -31,21 +31,19 @@ jobs:
         ini-file: development
         coverage: none
 
-    - name: Get Composer Cache Directory
-      id: composer-cache-dir
-      run: |
-        echo "::set-output name=dir::$(composer config cache-files-dir)"
+    - name: Get Composer cache directory
+      id: composer-cache
+      run: echo "dir=$(composer config cache-files-dir)" >> "$GITHUB_OUTPUT"
 
     - name: Cache PHP Dependencies
-      id: composer-cache
       uses: actions/cache@v4
       with:
-        path: ${{ steps.composer-cache-dir.outputs.dir }}
+        path: ${{ steps.composer-cache.outputs.dir }}
         key: ${{ runner.os }}-composer-${{ matrix.php }}-${{ hashFiles('composer.json') }}
 
     - name: Install PHP Dependencies
       run: |
-        composer update --prefer-dist --no-progress --no-interaction
+        composer install --prefer-dist --no-progress --no-interaction
 
     - name: Run the tests
       run: |