diff --git a/lib/fluent/plugin/in_dummy.rb b/lib/fluent/plugin/in_dummy.rb
index ff0be575b1..464cfdd8b3 100644
--- a/lib/fluent/plugin/in_dummy.rb
+++ b/lib/fluent/plugin/in_dummy.rb
@@ -37,7 +37,7 @@ class DummyInput < Input
     desc "If specified, each generated event has an auto-incremented key field."
     config_param :auto_increment_key, :string, default: nil
     desc "The boolean to suspend-and-resume incremental value after restart"
-    config_param :suspend, :bool, default: false
+    config_param :suspend, :bool, default: false,deprecated: 'This parameters is ignored'
     desc "The dummy data to be generated. An array of JSON hashes or a single JSON hash."
     config_param :dummy, default: [{"message"=>"dummy"}] do |val|
       begin
diff --git a/test/plugin/test_in_dummy.rb b/test/plugin/test_in_dummy.rb
index 6d999cf5b1..b41d0684f5 100644
--- a/test/plugin/test_in_dummy.rb
+++ b/test/plugin/test_in_dummy.rb
@@ -95,16 +95,15 @@ def create_driver(conf)
   TEST_PLUGIN_STORAGE_PATH = File.join( File.dirname(File.dirname(__FILE__)), 'tmp', 'in_dummy', 'store' )
   FileUtils.mkdir_p TEST_PLUGIN_STORAGE_PATH
 
-  sub_test_case "doesn't suspend internal counters in default" do
+  sub_test_case 'when dummy plugin has storage which is not specified the path'  do
     config1 = {
       'tag' => 'dummy',
       'rate' => '2',
       'dummy' => '[{"x": 1, "y": "1"}, {"x": 2, "y": "2"}, {"x": 3, "y": "3"}]',
       'auto_increment_key' => 'id',
-      'suspend' => false,
     }
     conf1 = config_element('ROOT', '', config1, [])
-    test "value of auto increment key is not suspended after stop-and-start" do
+    test "value of auto increment key is not kept after stop-and-start" do
       assert !File.exist?(File.join(TEST_PLUGIN_STORAGE_PATH, 'json', 'test-01.json'))
 
       d1 = create_driver(conf1)
@@ -136,7 +135,7 @@ def create_driver(conf)
     end
   end
 
-  sub_test_case "suspend internal counters if suspend is true" do
+  sub_test_case 'when dummy plugin has storage which is specified the path'  do
     setup do
       FileUtils.rm_rf(TEST_PLUGIN_STORAGE_PATH)
       FileUtils.mkdir_p(File.join(TEST_PLUGIN_STORAGE_PATH, 'json'))
@@ -149,7 +148,6 @@ def create_driver(conf)
       'rate' => '2',
       'dummy' => '[{"x": 1, "y": "1"}, {"x": 2, "y": "2"}, {"x": 3, "y": "3"}]',
       'auto_increment_key' => 'id',
-      'suspend' => true,
     }
     conf2 = config_element('ROOT', '', config2, [
               config_element(
@@ -161,7 +159,7 @@ def create_driver(conf)
                  'persistent' => true,
                 })
             ])
-    test "value of auto increment key is suspended after stop-and-start" do
+    test "value of auto increment key is kept after stop-and-start" do
       assert !File.exist?(File.join(TEST_PLUGIN_STORAGE_PATH, 'json', 'test-02.json'))
 
       d1 = create_driver(conf2)