diff --git a/plugins/adva_safemode/lib/safemode/jail.rb b/plugins/adva_safemode/lib/safemode/jail.rb
index ad30aecdf..5e07a78f6 100644
--- a/plugins/adva_safemode/lib/safemode/jail.rb
+++ b/plugins/adva_safemode/lib/safemode/jail.rb
@@ -12,6 +12,10 @@ def to_s
       @source.to_s
     end
 
+    def respond_to?(method)
+      self.class.allowed?(method) or super
+    end
+
     def method_missing(method, *args, &block)
       unless self.class.allowed?(method)
         raise Safemode::NoMethodError.new(method, self.class.name, @source.class.name)
diff --git a/plugins/adva_safemode/test/test_helper.rb b/plugins/adva_safemode/test/test_helper.rb
index 0a87c8d3f..2cee80103 100644
--- a/plugins/adva_safemode/test/test_helper.rb
+++ b/plugins/adva_safemode/test/test_helper.rb
@@ -128,3 +128,14 @@ class Article::ExtendedJail < Article::Jail
 class Comment::Jail < Safemode::Jail
   allow :article, :text
 end
+
+class SpecialString < String
+  class Jail < Safemode::Jail
+    allow :special
+  end
+
+  def special
+    "some special method"
+  end
+end
+
diff --git a/plugins/adva_safemode/test/test_jail.rb b/plugins/adva_safemode/test/test_jail.rb
index 960be0a25..d982abd06 100644
--- a/plugins/adva_safemode/test/test_jail.rb
+++ b/plugins/adva_safemode/test/test_jail.rb
@@ -25,17 +25,13 @@ def test_jail_instances_should_have_limited_methods
     end
   end
 
-  # def test_jail_instances_keep_try
-  #   object = "string"
-  #   object.instance_eval do
-  #     def try(*args)
-  #       "some try method which is so popular/useful nowadays"
-  #     end
-  #   end
-  #
-  #   assert object.methods.include?("try"), "should have a try method without the jail"
-  #   assert object.to_jail.methods.include?("try"), "should have kept the try method in the jail available"
-  # end
+  def test_jail_instances_can_be_tested_with_respond_to
+    object = SpecialString.new('String Subclass')
+
+    assert object.respond_to?("special")
+    assert object.to_jail.respond_to?("special")
+  end
+
 
   def test_jail_classes_should_have_limited_methods
     expected = ["new", "methods", "name", "inherited", "method_added", "inspect",