Samit Khulve
--- a/tests/src/Unit/Fast404EventSubscriberTest.php
+++ b/tests/src/Unit/Fast404EventSubscriberTest.php
    parent::setUp();
    $kernel = $this->createMock('\Symfony\Component\HttpKernel\HttpKernelInterface');
    $request = new Request();
-    $this->event = new ExceptionEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST, new NotFoundHttpException());
+    $this->event = new ExceptionEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, new NotFoundHttpException());