diff --git a/.travis.yml b/.travis.yml
index 485b099..389cfdc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,6 @@ matrix:
   allow_failures:
     - php: hhvm
     - php: hhvm-nightly
-    - php: 7.0
 
 services:
   - redis-server
diff --git a/commands/AsyncWorkerCommand.php b/commands/AsyncWorkerCommand.php
index 8299ca5..e67923b 100644
--- a/commands/AsyncWorkerCommand.php
+++ b/commands/AsyncWorkerCommand.php
@@ -8,7 +8,6 @@
 class AsyncWorkerCommand extends \yii\console\Controller
 {
     static $state = 1;
-    protected $child;
 
     /**
      * @param string|null $queueName