1 files changed, 9 insertions, 1 deletions
diff --git a/spec/ruby/core/module/initialize_copy_spec.rb b/spec/ruby/core/module/initialize_copy_spec.rb
index 85f1bbeb17..7ae48f85a9 100644
--- a/spec/ruby/core/module/initialize_copy_spec.rb
+++ b/spec/ruby/core/module/initialize_copy_spec.rb
@@ -1,4 +1,4 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
 
 describe "Module#initialize_copy" do
   it "should retain singleton methods when duped" do
@@ -7,4 +7,12 @@ describe "Module#initialize_copy" do
     end
     mod.dup.methods(false).should == [:hello]
   end
+
+  # jruby/jruby#5245, https://bugs.ruby-lang.org/issues/3461
+  it "should produce a duped module with inspectable class methods" do
+    mod = Module.new
+    def mod.hello
+    end
+    mod.dup.method(:hello).inspect.should =~ /Module.*hello/
+  end
 end