diff --git a/app/models/fluentd/agent/fluentd_gem.rb b/app/models/fluentd/agent/fluentd_gem.rb
index 34b6047..640a6ac 100644
--- a/app/models/fluentd/agent/fluentd_gem.rb
+++ b/app/models/fluentd/agent/fluentd_gem.rb
@@ -5,7 +5,7 @@ class Fluentd
       include LocalCommon
 
       def self.default_options
-        {
+       {
           :pid_file    => "#{ENV["HOME"]}/.fluentd-ui/fluent.pid",
           :log_file    => "#{ENV["HOME"]}/.fluentd-ui/fluent.log",
           :config_file => "#{ENV["HOME"]}/.fluentd-ui/fluent.conf",
@@ -42,6 +42,12 @@ class Fluentd
         actual_reload
       end
 
+      def dryrun
+        Bundler.with_clean_env do
+          system("fluentd --dry-run #{options_to_argv}")
+        end
+      end
+
       def version
         Bundler.with_clean_env do
           `fluentd --version`.strip
@@ -60,9 +66,7 @@ class Fluentd
       end
 
       def validate_fluentd_options
-        Bundler.with_clean_env do
-          system("fluentd --dry-run #{options_to_argv}")
-        end
+        dryrun
       end
 
       def actual_start
diff --git a/app/models/fluentd/agent/td_agent/macosx.rb b/app/models/fluentd/agent/td_agent/macosx.rb
index 4d12099..78429a8 100644
--- a/app/models/fluentd/agent/td_agent/macosx.rb
+++ b/app/models/fluentd/agent/td_agent/macosx.rb
@@ -2,7 +2,6 @@ class Fluentd
   class Agent
     class TdAgent
       module Macosx
-
         def start
           backup_running_config do
             detached_command("launchctl load #{plist}") && pid_from_launchctl
@@ -17,6 +16,10 @@ class Fluentd
           stop && start
         end
 
+        def dryrun
+          detached_command("/usr/sbin/td-agent --dry-run -q --use-v1-config -c #{config_file} -o #{log_file}")
+        end
+
         private
 
         def plist
diff --git a/app/models/fluentd/agent/td_agent/unix.rb b/app/models/fluentd/agent/td_agent/unix.rb
index 09f6353..db5ccc3 100644
--- a/app/models/fluentd/agent/td_agent/unix.rb
+++ b/app/models/fluentd/agent/td_agent/unix.rb
@@ -17,6 +17,10 @@ class Fluentd
           # https://github.com/treasure-data/td-agent/blob/master/debian/td-agent.init#L156
           detached_command('/etc/init.d/td-agent restart')
         end
+
+        def dryrun
+          detached_command('/etc/init.d/td-agent configtest')
+        end
       end
     end
   end