diff --git a/test/unit/post_replacement_test.rb b/test/unit/post_replacement_test.rb
index 42d1fa824..5c9f0447f 100644
--- a/test/unit/post_replacement_test.rb
+++ b/test/unit/post_replacement_test.rb
@@ -246,7 +246,7 @@ class PostReplacementTest < ActiveSupport::TestCase
     context "a post when replaced with a HTML source" do
       should "record the image URL as the replacement URL, not the HTML source" do
         replacement_url = "https://twitter.com/nounproject/status/540944400767922176"
-        image_url = "http://pbs.twimg.com/media/B4HSEP5CUAA4xyu.png:orig"
+        image_url = "https://pbs.twimg.com/media/B4HSEP5CUAA4xyu.png:orig"
         @post.replace!(replacement_url: replacement_url)
 
         assert_equal(image_url, @post.replacements.last.replacement_url)