diff --git a/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php b/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
index e84d793..a3fcf9a 100644
--- a/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
+++ b/core/modules/system/src/Tests/Common/NoJavaScriptAnonymousTest.php
@@ -57,7 +57,8 @@ public function testNoJavaScript() {
    */
   protected function assertNoJavaScriptExceptHtml5Shiv() {
     // Ensure drupalSettings is not set.
-    $this->assertNoRaw('var drupalSettings = {', 'drupalSettings is not set.');
+    $settings = $this->getDrupalSettings();
+    $this->assertTrue(empty($settings), 'drupalSettings is not set.');
 
     // Ensure the HTML5 shiv exists.
     $this->assertRaw('html5shiv/html5shiv.min.js', 'HTML5 shiv JavaScript exists.');