1 files changed, 11 insertions, 0 deletions
diff --git a/test/fiber/scheduler.rb b/test/fiber/scheduler.rb
index 3fd41ef6f1..204a297133 100644
--- a/test/fiber/scheduler.rb
+++ b/test/fiber/scheduler.rb
@@ -350,3 +350,14 @@ class SleepingUnblockScheduler < Scheduler
     sleep(0.1)
   end
 end
+
+class SleepingBlockingScheduler < Scheduler
+  def kernel_sleep(duration = nil)
+    # Deliberaly sleep in a blocking state which can trigger a deadlock if the implementation is not correct.
+    Fiber.blocking{sleep 0.0001}
+
+    self.block(:sleep, duration)
+
+    return true
+  end
+end