diff --git a/Rakefile b/Rakefile
index c1bd28d..ea3ef4a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -17,7 +17,9 @@ task :test do
                               enforce_https: true,
                               validation: { ignore_script_embeds: true },
                               url_swap: { %r{https://choosealicense.com} => '' },
-                              url_ignore: [%r{https://github.com/github/choosealicense.com/edit/gh-pages/_licenses/}, %r{https://help.github.com}],
+                              url_ignore: [%r{https://github.com/github/choosealicense.com/edit/gh-pages/_licenses/},
+                                           %r{https://help.github.com},
+                                           %r{https://opensource.org}],
                               hydra: { max_concurrency: 10 },
                               check_img_http: true).run
 end