diff --git a/lib/concurrent-ruby/concurrent/executor/java_executor_service.rb b/lib/concurrent-ruby/concurrent/executor/java_executor_service.rb
index b2bc69a6e..96991a78e 100644
--- a/lib/concurrent-ruby/concurrent/executor/java_executor_service.rb
+++ b/lib/concurrent-ruby/concurrent/executor/java_executor_service.rb
@@ -46,6 +46,7 @@ def shutdown
       def kill
         synchronize do
           @executor.shutdownNow
+          wait_for_termination
           nil
         end
       end
diff --git a/lib/concurrent-ruby/concurrent/executor/timer_set.rb b/lib/concurrent-ruby/concurrent/executor/timer_set.rb
index 759dce093..b936c7b2f 100644
--- a/lib/concurrent-ruby/concurrent/executor/timer_set.rb
+++ b/lib/concurrent-ruby/concurrent/executor/timer_set.rb
@@ -61,6 +61,7 @@ def post(delay, *args, &task)
     # not running.
     def kill
       shutdown
+      @timer_executor.kill
     end
 
     private :<<
@@ -122,7 +123,9 @@ def remove_task(task)
     def ns_shutdown_execution
       ns_reset_if_forked
       @queue.clear
-      @timer_executor.kill
+      @condition.set
+      @condition.reset
+      @timer_executor.shutdown
       stopped_event.set
     end
 
diff --git a/spec/concurrent/executor/timer_set_spec.rb b/spec/concurrent/executor/timer_set_spec.rb
index a386553b4..f4169473d 100644
--- a/spec/concurrent/executor/timer_set_spec.rb
+++ b/spec/concurrent/executor/timer_set_spec.rb
@@ -244,7 +244,7 @@ module Concurrent
         expect(task.schedule_time).to eq expected
       end
 
-      it 'reschdules a pending and unpost task when given a valid time' do
+      it 'reschedules a pending and unpost task when given a valid time' do
         initial_delay = 10
         rescheduled_delay = 20
         task = subject.post(initial_delay){ nil }