diff --git a/tests/php/Control/Email/EmailTest.php b/tests/php/Control/Email/EmailTest.php
index 62fded92dea..f68bee7b104 100644
--- a/tests/php/Control/Email/EmailTest.php
+++ b/tests/php/Control/Email/EmailTest.php
@@ -24,8 +24,7 @@
 
 class EmailTest extends SapphireTest
 {
-
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
         Director::config()->set('alternate_base_url', 'http://www.mysite.com/');