diff --git a/lib/puma/cluster.rb b/lib/puma/cluster.rb
index 3b301bb063..c43e38b4a0 100644
--- a/lib/puma/cluster.rb
+++ b/lib/puma/cluster.rb
@@ -164,16 +164,6 @@ def check_workers
       ].compact.min
     end
 
-    def wakeup!
-      return unless @wakeup
-
-      begin
-        @wakeup.write "!" unless @wakeup.closed?
-      rescue SystemCallError, IOError
-        Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
-      end
-    end
-
     def worker(index, master)
       @workers = []
 
diff --git a/lib/puma/cluster/worker.rb b/lib/puma/cluster/worker.rb
index 05991dda2d..53720f4d37 100644
--- a/lib/puma/cluster/worker.rb
+++ b/lib/puma/cluster/worker.rb
@@ -168,16 +168,6 @@ def spawn_worker(idx)
         @launcher.config.run_hooks :after_worker_fork, idx, @launcher.events
         pid
       end
-
-      def wakeup!
-        return unless @wakeup
-
-        begin
-          @wakeup.write "!" unless @wakeup.closed?
-        rescue SystemCallError, IOError
-          Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
-        end
-      end
     end
   end
 end
diff --git a/lib/puma/runner.rb b/lib/puma/runner.rb
index 30c4a89b2c..473b4ce59e 100644
--- a/lib/puma/runner.rb
+++ b/lib/puma/runner.rb
@@ -15,6 +15,16 @@ def initialize(cli, events)
       @app = nil
       @control = nil
       @started_at = Time.now
+      @wakeup = nil
+    end
+
+    def wakeup!
+      return unless @wakeup
+
+      @wakeup.write "!" unless @wakeup.closed?
+
+    rescue SystemCallError, IOError
+      Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
     end
 
     def development?
@@ -108,9 +118,7 @@ def redirect_io
       append = @options[:redirect_append]
 
       if stdout
-        unless Dir.exist?(File.dirname(stdout))
-          raise "Cannot redirect STDOUT to #{stdout}"
-        end
+        ensure_output_directory_exists(stdout, 'STDOUT')
 
         STDOUT.reopen stdout, (append ? "a" : "w")
         STDOUT.puts "=== puma startup: #{Time.now} ==="
@@ -118,9 +126,7 @@ def redirect_io
       end
 
       if stderr
-        unless Dir.exist?(File.dirname(stderr))
-          raise "Cannot redirect STDERR to #{stderr}"
-        end
+        ensure_output_directory_exists(stderr, 'STDERR')
 
         STDERR.reopen stderr, (append ? "a" : "w")
         STDERR.puts "=== puma startup: #{Time.now} ==="
@@ -159,5 +165,12 @@ def start_server
       server.inherit_binder @launcher.binder
       server
     end
+
+    private
+    def ensure_output_directory_exists(path, io_name)
+      unless Dir.exist?(File.dirname(path))
+        raise "Cannot redirect #{io_name} to #{path}"
+      end
+    end
   end
 end