1 files changed, 8 insertions, 0 deletions
diff --git a/test/fiber/test_scheduler.rb b/test/fiber/test_scheduler.rb
index 23b59c06b0..d85aa7a6ce 100644
--- a/test/fiber/test_scheduler.rb
+++ b/test/fiber/test_scheduler.rb
@@ -49,4 +49,12 @@ class TestFiberScheduler < Test::Unit::TestCase
     end
     RUBY
   end
+
+  def test_optional_close
+    thread = Thread.new do
+      Thread.current.scheduler = Object.new
+    end
+    
+    thread.join
+  end
 end