diff --git a/phpunit.xml b/phpunit.xml
index f6a7a5ca..f742d698 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -21,6 +21,7 @@
     </filter>
     <php>
         <env name="APP_ENV" value="testing"/>
+        <env name="APP_KEY" value="CMOxJYitit2cFgI9FbbxJJpWxBBZl6RU"/>
         <env name="CACHE_DRIVER" value="array"/>
         <env name="SESSION_DRIVER" value="array"/>
         <env name="QUEUE_DRIVER" value="sync"/>