diff --git a/config/services.yaml b/config/services.yaml
index 6e08fe3..4984b46 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -3,7 +3,7 @@ imports:
     - {resource: reports.yaml}
 
 parameters:
-    env(EVALUATOR_PROJECT_DIR): ~
+    env(EVALUATOR_PROJECT_DIR): ''
     env(GITHUB_AUTH): ~
     report_file: 'reports/evaluator.*'
     current_php_version: "%env(default:current_server_php_version:string:PROJECT_PHP_VERSION)%"
@@ -147,4 +147,3 @@ services:
             - '%project_id%'
             - '%repository_name%'
             - '%organization_name%'
-
diff --git a/src/Resolver/PathResolver.php b/src/Resolver/PathResolver.php
index 7f99f7e..e2f004b 100644
--- a/src/Resolver/PathResolver.php
+++ b/src/Resolver/PathResolver.php
@@ -15,9 +15,9 @@
 class PathResolver implements PathResolverInterface
 {
     /**
-     * @var string|null
+     * @var string
      */
-    protected ?string $projectDirEnv;
+    protected string $projectDirEnv;
 
     /**
      * @var \Symfony\Component\Filesystem\Filesystem
@@ -25,10 +25,10 @@ class PathResolver implements PathResolverInterface
     protected Filesystem $filesystem;
 
     /**
-     * @param string|null $projectDirEnv
+     * @param string $projectDirEnv
      * @param \Symfony\Component\Filesystem\Filesystem $filesystem
      */
-    public function __construct(?string $projectDirEnv, Filesystem $filesystem)
+    public function __construct(string $projectDirEnv, Filesystem $filesystem)
     {
         $this->projectDirEnv = $projectDirEnv;
         $this->filesystem = $filesystem;
@@ -77,6 +77,6 @@ public function createPath(string $relativePath = ''): string
      */
     public function getProjectDir(): string
     {
-        return $this->projectDirEnv ?? (string)getcwd();
+        return $this->projectDirEnv ?: (string)getcwd();
     }
 }