diff --git a/core/modules/system/src/Tests/Module/UninstallTest.php b/core/modules/system/src/Tests/Module/UninstallTest.php
index 797b95a..3a6fe8f 100644
--- a/core/modules/system/src/Tests/Module/UninstallTest.php
+++ b/core/modules/system/src/Tests/Module/UninstallTest.php
@@ -76,5 +76,7 @@ function testUninstallPage() {
     }
     $this->drupalPostForm(NULL, NULL, t('Uninstall'));
     $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
+    // Test the page if it has multiple HTML sanitizations.
+    $this->assertNoRaw('<label', 'The page does not have multiple HTML sanitizations');
   }
 }