diff --git a/tests/src/Core/Addon/Model/AddonLoaderTest.php b/tests/src/Core/Addon/Model/AddonLoaderTest.php
index f49333b32d..7482291c34 100644
--- a/tests/src/Core/Addon/Model/AddonLoaderTest.php
+++ b/tests/src/Core/Addon/Model/AddonLoaderTest.php
@@ -160,7 +160,7 @@ EOF;
 	public function testWrongContent()
 	{
 		$filename     = 'addon/testaddon1/static/hooks.config.php';
-		$wrongContent = "<php return 'wrong';";
+		$wrongContent = "<?php return 'wrong';";
 
 		vfsStream::create($this->structure)->at($this->root);
 
@@ -190,7 +190,7 @@ EOF;
 	public function testNoHooksConfig()
 	{
 		$filename     = 'addon/testaddon1/static/hooks.config.php';
-		$wrongContent = "<php return 'wrong';";
+		$wrongContent = "<?php return 'wrong';";
 
 		vfsStream::create($this->structure)->at($this->root);
 
diff --git a/tests/src/Core/Hooks/Util/StrategiesFileManagerTest.php b/tests/src/Core/Hooks/Util/StrategiesFileManagerTest.php
index ebb213fa7b..b70d3d8964 100644
--- a/tests/src/Core/Hooks/Util/StrategiesFileManagerTest.php
+++ b/tests/src/Core/Hooks/Util/StrategiesFileManagerTest.php
@@ -190,7 +190,7 @@ EOF,
 		$hookFileManager = new StrategiesFileManager($this->root->url(), $addonLoader);
 
 		vfsStream::newFile(StrategiesFileManager::STATIC_DIR . '/' . StrategiesFileManager::CONFIG_NAME . '.config.php')
-				 ->withContent("<php return 'WRONG_CONTENT';")
+				 ->withContent("<?php return 'WRONG_CONTENT';")
 				 ->at($this->root);
 
 		self::expectException(HookConfigException::class);