diff --git a/Gemfile b/Gemfile
index 1850ea6..0d547c2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,4 +10,5 @@ group :development, :test do
   gem "rspec-rails", "~> 2.0"
   gem "factory_girl_rails"
   gem "database_cleaner", "~> 1.2.0"
+  gem "capybara", "~> 2.2.1"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 28ab76a..8747ad6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,6 +47,12 @@ GEM
     arel (5.0.1.20140414130214)
     bcrypt (3.1.7)
     builder (3.2.2)
+    capybara (2.2.1)
+      mime-types (>= 1.16)
+      nokogiri (>= 1.3.3)
+      rack (>= 1.0.0)
+      rack-test (>= 0.5.4)
+      xpath (~> 2.0)
     coderay (1.1.0)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
@@ -188,12 +194,15 @@ GEM
       unf_ext
     unf_ext (0.0.6)
     webrobots (0.1.1)
+    xpath (2.0.0)
+      nokogiri (~> 1.3)
     yajl-ruby (1.2.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  capybara (~> 2.2.1)
   database_cleaner (~> 1.2.0)
   factory_girl_rails
   fluentd-ui!
diff --git a/app/views/sessions/new.html.haml b/app/views/sessions/new.html.haml
index 5e1f88c..f1d3e69 100644
--- a/app/views/sessions/new.html.haml
+++ b/app/views/sessions/new.html.haml
@@ -4,4 +4,5 @@
   = f.text_field :name
   = f.label :password
   = f.text_field :password
-  = f.submit
+  = submit_tag t("terms.sign_in")
+
diff --git a/spec/features/sign_in_spec.rb b/spec/features/sign_in_spec.rb
new file mode 100644
index 0000000..31321b3
--- /dev/null
+++ b/spec/features/sign_in_spec.rb
@@ -0,0 +1,31 @@
+describe "the sign in process" do
+  let(:submit_label) { I18n.t("terms.sign_in") }
+  let(:exists_user) { FactoryGirl.create(:user) }
+  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
+  end
+
+  context "sign in with exists user" do
+    let(:user) { exists_user }
+    it "login success, then redirect to root_path" do
+      current_path.should == root_path
+    end
+  end
+
+  context "sign in with non-exists user" do
+    let(:user) { FactoryGirl.build(:user) }
+
+    it "current location is not root_path" do
+      current_path.should_not == root_path
+    end
+
+    it "display form for retry" do
+      page.body.should have_css('form')
+    end
+  end
+end