diff --git a/lib/listen/adapter/base.rb b/lib/listen/adapter/base.rb
index 2bf07bc0..b7e10390 100644
--- a/lib/listen/adapter/base.rb
+++ b/lib/listen/adapter/base.rb
@@ -88,7 +88,7 @@ def stop
       private
 
       def _stop
-        @run_thread.kill.join if @run_thread
+        @run_thread&.kill
         @run_thread = nil
       end
 
diff --git a/lib/listen/adapter/darwin.rb b/lib/listen/adapter/darwin.rb
index ac7412c4..07c7a567 100644
--- a/lib/listen/adapter/darwin.rb
+++ b/lib/listen/adapter/darwin.rb
@@ -69,7 +69,7 @@ def _process_event(dir, path)
       end
 
       def _stop
-        @worker_thread.kill.join if @worker_thread
+        @worker_thread&.kill
         super
       end
     end
diff --git a/spec/lib/listen/adapter/polling_spec.rb b/spec/lib/listen/adapter/polling_spec.rb
index 6c04380d..fae546fb 100644
--- a/spec/lib/listen/adapter/polling_spec.rb
+++ b/spec/lib/listen/adapter/polling_spec.rb
@@ -58,8 +58,9 @@
         expect(snapshot).to receive(:invalidate).
           with(:dir, '.', { recursive: true })
 
-        subject.start
+        t = Thread.new { subject.start }
         sleep 0.25
+        t.kill
       end
     end