diff --git a/lib/concurrent/timer_task.rb b/lib/concurrent/timer_task.rb
index 00956db96..8e66427c0 100644
--- a/lib/concurrent/timer_task.rb
+++ b/lib/concurrent/timer_task.rb
@@ -308,7 +308,7 @@ def schedule_next_task(interval = execution_interval)
     # @!visibility private
     def execute_task(completion)
       return nil unless @running.true?
-      ScheduledTask.execute(execution_interval, args: [completion], &method(:timeout_task))
+      ScheduledTask.execute(timeout_interval, args: [completion], &method(:timeout_task))
       _success, value, reason = @executor.execute(self)
       if completion.try?
         self.value = value
diff --git a/spec/concurrent/timer_task_spec.rb b/spec/concurrent/timer_task_spec.rb
index 6b4e1d676..6ed1cb597 100644
--- a/spec/concurrent/timer_task_spec.rb
+++ b/spec/concurrent/timer_task_spec.rb
@@ -243,7 +243,7 @@ def trigger_observable(observable)
       end
 
       it 'notifies all observers on timeout' do
-        subject = TimerTask.new(execution: 0.1, timeout: 0.1) { sleep }
+        subject = TimerTask.new(run_now: true, execution: 2, timeout: 0.1) { sleep }
         subject.add_observer(observer)
         subject.execute
         observer.latch.wait(1)