diff --git a/spec/features/fluentd/setting/out_elasticsearch_spec.rb b/spec/features/fluentd/setting/out_elasticsearch_spec.rb
index 9d967dc..66fa497 100644
--- a/spec/features/fluentd/setting/out_elasticsearch_spec.rb
+++ b/spec/features/fluentd/setting/out_elasticsearch_spec.rb
@@ -11,12 +11,7 @@ describe "out_elasticsearch" do
     Fluentd::Agent::TdAgent.any_instance.stub(:detached_command).and_return(true)
     daemon.agent.config_write ""
 
-    visit '/sessions/new'
-    within("form") do
-      fill_in 'session_name', :with => exists_user.name
-      fill_in 'session_password', :with => exists_user.password
-    end
-    click_button I18n.t("terms.sign_in")
+    login_with exists_user
   end
 
   it "Shown form" do
diff --git a/spec/features/fluentd/setting/out_forward_spec.rb b/spec/features/fluentd/setting/out_forward_spec.rb
index 9e1dd99..bc776b8 100644
--- a/spec/features/fluentd/setting/out_forward_spec.rb
+++ b/spec/features/fluentd/setting/out_forward_spec.rb
@@ -9,13 +9,8 @@ describe "out_forward" do
     Fluentd.stub(:instance).and_return(daemon)
     Fluentd::Agent::TdAgent.any_instance.stub(:detached_command).and_return(true)
     daemon.agent.config_write ""
-    
-    visit '/sessions/new'
-    within("form") do
-      fill_in 'session_name', :with => exists_user.name
-      fill_in 'session_password', :with => exists_user.password
-    end
-    click_button I18n.t("terms.sign_in")
+
+    login_with exists_user
   end
 
   it "Shown form" do
diff --git a/spec/features/fluentd/setting/out_td_spec.rb b/spec/features/fluentd/setting/out_td_spec.rb
index 57ce91f..efad9f4 100644
--- a/spec/features/fluentd/setting/out_td_spec.rb
+++ b/spec/features/fluentd/setting/out_td_spec.rb
@@ -9,13 +9,8 @@ describe "out_td" do
     Fluentd.stub(:instance).and_return(daemon)
     Fluentd::Agent::TdAgent.any_instance.stub(:detached_command).and_return(true)
     daemon.agent.config_write ""
-    
-    visit '/sessions/new'
-    within("form") do
-      fill_in 'session_name', :with => exists_user.name
-      fill_in 'session_password', :with => exists_user.password
-    end
-    click_button I18n.t("terms.sign_in")
+
+    login_with exists_user
   end
 
   it "Shown form with filled in td.*.* on match" do
diff --git a/spec/features/fluentd/setting/source_and_output_spec.rb b/spec/features/fluentd/setting/source_and_output_spec.rb
index 089cded..5bb04f9 100644
--- a/spec/features/fluentd/setting/source_and_output_spec.rb
+++ b/spec/features/fluentd/setting/source_and_output_spec.rb
@@ -7,15 +7,8 @@ describe "source_and_output", js: true do
   before do
     Fluentd.stub(:instance).and_return(daemon)
     Fluentd::Agent::TdAgent.any_instance.stub(:detached_command).and_return(true)
-  end
 
-  before do
-    visit '/sessions/new'
-    within("form") do
-      fill_in 'session_name', :with => exists_user.name
-      fill_in 'session_password', :with => exists_user.password
-    end
-    click_button I18n.t("terms.sign_in")
+    login_with exists_user
   end
 
   before do
diff --git a/spec/features/sessions_spec.rb b/spec/features/sessions_spec.rb
index 4ccbc47..92f8e61 100644
--- a/spec/features/sessions_spec.rb
+++ b/spec/features/sessions_spec.rb
@@ -5,12 +5,7 @@ describe "sessions" do
 
   describe "sign in with default password" do
     before do
-      visit '/sessions/new'
-      within("form") do
-        fill_in 'session_name', :with => user.name
-        fill_in 'session_password', :with => user.password
-      end
-      click_button submit_label
+      login_with user
     end
 
     context "correct credentials" do
@@ -40,12 +35,8 @@ describe "sessions" do
 
     before do
       exists_user.update_attributes(current_password: Settings.default_password, password: new_password, password_confirmation: new_password)
-      visit '/sessions/new'
-      within("form") do
-        fill_in 'session_name', :with => user.name
-        fill_in 'session_password', :with => user.password
-      end
-      click_button submit_label
+
+      login_with user
     end
 
     after do
@@ -71,12 +62,7 @@ describe "sessions" do
   describe "sign out process" do
     let(:submit_label) { I18n.t("terms.sign_in") }
     before do
-      visit '/sessions/new'
-      within("form") do
-        fill_in 'session_name', :with => exists_user.name
-        fill_in 'session_password', :with => exists_user.password
-      end
-      click_button submit_label
+      login_with exists_user
     end
 
     before do