1 files changed, 16 insertions, 2 deletions
diff --git a/test/fiber/test_scheduler.rb b/test/fiber/test_scheduler.rb
index eeb0d67ec5..f0f5b79f36 100644
--- a/test/fiber/test_scheduler.rb
+++ b/test/fiber/test_scheduler.rb
@@ -66,9 +66,23 @@ class TestFiberScheduler < Test::Unit::TestCase
     RUBY
   end
 
-  def test_optional_close
+  def test_minimal_interface
+    scheduler = Object.new
+
+    def scheduler.block
+    end
+
+    def scheduler.unblock
+    end
+
+    def scheduler.io_wait
+    end
+
+    def scheduler.kernel_sleep
+    end
+
     thread = Thread.new do
-      Fiber.set_scheduler Object.new
+      Fiber.set_scheduler scheduler
     end
 
     thread.join