diff --git a/tests/server-v2/index.php b/tests/server-v2/index.php
index 2c6d129..1ebdd13 100644
--- a/tests/server-v2/index.php
+++ b/tests/server-v2/index.php
@@ -13,6 +13,7 @@ require file_exists(__DIR__ . '/../../vendor/autoload.php') ? __DIR__ . '/../../
 
 Flight::set('flight.content_length', false);
 Flight::set('flight.views.path', './');
+Flight::set('flight.views.extension', '.phtml');
 // This enables the old functionality of Flight output buffering
 Flight::set('flight.v2.output_buffering', true);
 
diff --git a/tests/server/index.php b/tests/server/index.php
index d70eabf..b3d5230 100644
--- a/tests/server/index.php
+++ b/tests/server/index.php
@@ -13,6 +13,7 @@ declare(strict_types=1);
 
 Flight::set('flight.content_length', false);
 Flight::set('flight.views.path', './');
+Flight::set('flight.views.extension', '.phtml');
 //Flight::set('flight.v2.output_buffering', true);
 
 require_once 'LayoutMiddleware.php';