diff --git a/php/.gitignore b/php/.gitignore
new file mode 100644
index 0000000..d1502b0
--- /dev/null
+++ b/php/.gitignore
@@ -0,0 +1,2 @@
+vendor/
+composer.lock
diff --git a/php/composer.json b/php/composer.json
index 9f26623..9f94f18 100644
--- a/php/composer.json
+++ b/php/composer.json
@@ -4,7 +4,12 @@
     },
     "autoload": {
         "psr-4": {
-            "App\\": "src/"
+            "App\\": "../app/src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "App\\Tests\\": "tests/"
         }
     },
     "scripts": {
diff --git a/php/tests/Utils/DarkModeTest.php b/php/tests/Utils/DarkModeTest.php
index d021627..d8dc258 100644
--- a/php/tests/Utils/DarkModeTest.php
+++ b/php/tests/Utils/DarkModeTest.php
@@ -7,9 +7,17 @@ use PHPUnit\Framework\TestCase;
 
 class DarkModeTest extends TestCase
 {
-    public function testIsDarkModeByDefault()
+    public function testIsDarkModeByDefaultAfterInit()
     {
-        $darkMode = new DarkMode();
-        $this->assertFalse($darkMode->isDarkModeByDefault(), "DarkMode should not be enabled by default.");
+        // Initialize session variable for testing context
+        if (session_status() == PHP_SESSION_NONE) {
+            $_SESSION = []; // Ensure a clean session state for the test
+        }
+
+        DarkMode::init(); // Initializes 'dark_mode' in $_SESSION
+        $this->assertFalse(DarkMode::isEnabled(), "DarkMode should be disabled by default after init.");
+
+        // Clean up session variable
+        unset($_SESSION['dark_mode']);
     }
 }