diff --git a/composer.json b/composer.json
index 5c8ed2e..ccae4ed 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,8 @@
         "symfony/console": "^4.4|^5.0|^6.0",
         "symfony/stopwatch": "^4.4|^5.0|^6.0",
         "symfony/process": "^4.4.35|^5.0|^6.0",
-        "doctrine/collections": "^1.2|^2.0"
+        "doctrine/collections": "^1.2|^2.0",
+        "symfony/deprecation-contracts": "^2.1|^3"
     },
     "require-dev": {
         "behat/behat": "^3.6",
diff --git a/src/Queue/TestsQueue.php b/src/Queue/TestsQueue.php
index 302eebb..3af3e41 100644
--- a/src/Queue/TestsQueue.php
+++ b/src/Queue/TestsQueue.php
@@ -53,7 +53,15 @@ public function add($value): bool
             $value = new TestSuite($value);
         }
 
-        return parent::add($value);
+        parent::add($value);
+
+        trigger_deprecation(
+            'liuggio/fastest', 
+            '1.10', 
+            'The return value of Liuggio\Fastest\Queue\TestsQueue:add will change to void in v2 of the package'
+        );
+        
+        return true;
     }
 
     /**