diff --git a/app/models/tag.rb b/app/models/tag.rb
index 722b68d..d0ccedc 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -2,9 +2,8 @@ class Tag < ActiveRecord::Base
   has_many :taggings
   has_many :users, through: :taggings, source: :user
 
-  scope :fetch_list_by_tag_name, -> (tag_name){
+  scope :fetch_list_by_tag_name, -> (tag_name) {
     tag_arel = Tag.arel_table
     where(tag_arel[:tag_name].matches("%#{tag_name}%"))
   }
-
-end
+end
\ No newline at end of file
diff --git a/app/models/user.rb b/app/models/user.rb
index d9eb568..77b7a01 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -15,10 +15,10 @@ class User < ActiveRecord::Base
     scope "responsed_#{status}", -> (notice) { responsed_to_notice(notice).merge(Response.where(status: status)) }
   end
   scope :responsed_not_to_notice, -> (notice) {
-  SQL = %{LEFT OUTER JOIN (SELECT * FROM responses WHERE responses.notice_id = #{notice.id} ) A
+  sql = %{LEFT OUTER JOIN (SELECT * FROM responses WHERE responses.notice_id = #{notice.id} ) A
       ON users.id = A.user_id
       WHERE A.status is null}
-  joins(SQL) }
+  joins(sql) }
 
   scope :order_by_responsed_at, -> {order('responses.created_at ASC')}
   scope :order_by_read_at, -> {order('read_activity_marks.created_at DESC')}
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 70813ad..b03ea97 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -30,6 +30,17 @@
 
  config.include ShowMeTheCookies, :type => :feature
 
+ config.before(:suite) do
+    DatabaseCleaner.strategy = :transaction
+    DatabaseCleaner.clean_with(:truncation)
+  end
+
+  config.around(:each) do |example|
+    DatabaseCleaner.cleaning do
+      example.run
+    end
+  end
+
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false
   # instead of true.
diff --git a/spec/unit/models/tag_spec.rb b/spec/unit/models/tag_spec.rb
new file mode 100644
index 0000000..24e5a49
--- /dev/null
+++ b/spec/unit/models/tag_spec.rb
@@ -0,0 +1,14 @@
+require "rails_helper"
+
+RSpec.describe Tag, :type => :model do
+  describe "#fetch_list_by_tag_name" do
+    it "should fetch tag list where like name" do
+      tag1 = Tag.create!(tag_name: "Hello")
+      tag2 = Tag.create!(tag_name: "World")
+      tag3 = Tag.create!(tag_name: "Yellow")
+
+      expect(Tag.fetch_list_by_tag_name("Worl")).to contain_exactly(tag2)
+      expect(Tag.fetch_list_by_tag_name("llo")).to contain_exactly(tag1, tag3)
+    end
+  end
+end
\ No newline at end of file