diff --git a/phpunit.xml b/phpunit.xml
index f9a103f..0994cf1 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -19,6 +19,7 @@
     </coverage>
     <php>
         <server name="APP_ENV" value="testing"/>
+        <server name="APP_KEY" value="base64:SKEJSy9oF9chQBCMbxqgj5zhtAvug9kwZ+cDiP1Y8A8="/>
         <server name="BCRYPT_ROUNDS" value="4"/>
         <server name="CACHE_DRIVER" value="array"/>
         <server name="DB_CONNECTION" value="sqlite"/>