diff --git a/core/modules/system/src/Tests/Installer/InstallerTest.php b/core/modules/system/src/Tests/Installer/InstallerTest.php
index 74f1c5c..876e065 100644
--- a/core/modules/system/src/Tests/Installer/InstallerTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerTest.php
@@ -38,8 +38,8 @@ public function testInstaller() {
   protected function setUpLanguage() {
     // Test that \Drupal\Core\Render\BareHtmlPageRenderer adds assets and
     // metatags as expected to the first page of the installer.
-    $this->assertRaw('core/themes/seven/css/components/buttons.css', 'Seven\'s css is attached.');
-    $this->assertRaw('<meta name="charset" charset="utf-8" />', 'The installer page character set is set to utf-8.');
+    $this->assertRaw('core/themes/seven/css/components/buttons.css');
+    $this->assertRaw('<meta name="charset" charset="utf-8" />');
     parent::setUpLanguage();
   }
 }