diff --git a/test/test_tags.rb b/test/test_tags.rb
index f077615d..68fd4039 100644
--- a/test/test_tags.rb
+++ b/test/test_tags.rb
@@ -643,7 +643,7 @@ CONTENT
 
     should "throw a deprecation warning" do
       deprecation_warning = "       Deprecation: A call to "\
-        "'{{ post_url 2008-11-21-nested }}' did not match a post using the new matching "\
+        "'{% post_url 2008-11-21-nested %}' did not match a post using the new matching "\
         "method of checking name (path-date-slug) equality. Please make sure that you "\
         "change this tag to match the post's name exactly."
       assert_includes Jekyll.logger.messages, deprecation_warning