diff -u b/core/modules/file/src/Tests/FileManagedFileElementTest.php b/core/modules/file/src/Tests/FileManagedFileElementTest.php
--- b/core/modules/file/src/Tests/FileManagedFileElementTest.php
+++ b/core/modules/file/src/Tests/FileManagedFileElementTest.php
@@ -171,7 +171,7 @@
     $file->delete();
 
     $this->drupalPostForm(NULL, $edit, t('Upload'));
-    $this->assertEscaped('The file referenced by the Managed file <br> field does not exist.');
+    $this->assertRaw('The file referenced by the Managed <em>file</em> field does not exist.');
   }
 
 }
diff -u b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
--- b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
+++ b/core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php
@@ -43,7 +43,7 @@
 
     $form['nested']['file'] = array(
       '#type' => 'managed_file',
-      '#title' => 'Managed file <br>',
+      '#title' => $this->t('Managed <em>@name</em>', ['@name' => 'file']),
       '#upload_location' => 'public://test',
       '#progress_message' => $this->t('Please wait...'),
       '#extended' => (bool) $extended,