1 files changed, 6 insertions, 4 deletions
diff --git a/actionpack/lib/action_dispatch/testing/assertions.rb b/actionpack/lib/action_dispatch/testing/assertions.rb
index fae266273e..08c2969685 100644
--- a/actionpack/lib/action_dispatch/testing/assertions.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions.rb
@@ -1,9 +1,11 @@
-require 'rails-dom-testing'
+# frozen_string_literal: true
+
+require "rails-dom-testing"
 
 module ActionDispatch
   module Assertions
-    autoload :ResponseAssertions, 'action_dispatch/testing/assertions/response'
-    autoload :RoutingAssertions, 'action_dispatch/testing/assertions/routing'
+    autoload :ResponseAssertions, "action_dispatch/testing/assertions/response"
+    autoload :RoutingAssertions, "action_dispatch/testing/assertions/routing"
 
     extend ActiveSupport::Concern
 
@@ -12,7 +14,7 @@ module ActionDispatch
     include Rails::Dom::Testing::Assertions
 
     def html_document
-      @html_document ||= if @response.content_type.to_s =~ /xml\z/
+      @html_document ||= if @response.content_type.to_s.end_with?("xml")
         Nokogiri::XML::Document.parse(@response.body)
       else
         Nokogiri::HTML::Document.parse(@response.body)