1 files changed, 10 insertions, 0 deletions
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index b39cd3747b..b11fd55170 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -793,5 +793,15 @@ module ApplicationTests
 
       assert ActiveRecord::Base.dump_schema_after_migration
     end
+
+    test "config.annotations wrapping SourceAnnotationExtractor::Annotation class" do
+      make_basic_app do |app|
+        app.config.annotations.register_extensions("coffee") do |tag|
+          /#\s*(#{tag}):?\s*(.*)$/
+        end
+      end
+
+      assert_not_nil SourceAnnotationExtractor::Annotation.extensions[/\.(coffee)$/]
+    end
   end
 end