diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 000000000..67f8d85d4
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,25 @@
+name: test
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  unit:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: [ '7.4' ]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          tools: cs2pr, parallel-lint
+
+      - name: Lint sources
+        run: composer exec --no-interaction -- parallel-lint bin/ contrib/ recipe/ src/ tests/ --checkstyle | cs2pr
diff --git a/src/Component/PharUpdate/Update.php b/src/Component/PharUpdate/Update.php
index 9b850d411..004d12f81 100644
--- a/src/Component/PharUpdate/Update.php
+++ b/src/Component/PharUpdate/Update.php
@@ -101,7 +101,7 @@ public function copyTo(string $file): void
             );
         }
 
-        $mode = 0o755;
+        $mode = 0755;
 
         if (file_exists($file)) {
             $mode = fileperms($file) & 511;
diff --git a/src/Documentation/DocGen.php b/src/Documentation/DocGen.php
index 0e8ee636a..29cebac77 100644
--- a/src/Documentation/DocGen.php
+++ b/src/Documentation/DocGen.php
@@ -1,4 +1,4 @@
-<?php
+<?php // lint >= 8.0
 
 declare(strict_types=1);
 
diff --git a/tests/legacy/recipe/named_arguments.php b/tests/legacy/recipe/named_arguments.php
index 204412185..f0280e916 100644
--- a/tests/legacy/recipe/named_arguments.php
+++ b/tests/legacy/recipe/named_arguments.php
@@ -1,4 +1,4 @@
-<?php
+<?php // lint >= 8.0
 
 namespace Deployer;