diff --git a/app/models/map.rb b/app/models/map.rb
index e5c483f1..48dcae3b 100644
--- a/app/models/map.rb
+++ b/app/models/map.rb
@@ -17,7 +17,7 @@ class Map < ActiveRecord::Base
   validates :arranged, presence: true
   validates :arranged, inclusion: { in: [true, false] }
   validates :permission, presence: true
-  validates :permission, inclusion: { in: Perm::ISSIONS }
+  validates :permission, inclusion: { in: Perm::ISSIONS.map(&:to_s) }
     
   # Validate the attached image is image/jpg, image/png, etc
   validates_attachment_content_type :screenshot, :content_type => /\Aimage\/.*\Z/
diff --git a/spec/factories/maps.rb b/spec/factories/maps.rb
new file mode 100644
index 00000000..74058605
--- /dev/null
+++ b/spec/factories/maps.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :map do
+    name { random_string(10) }
+    permission :commons
+    user
+  end
+end
diff --git a/spec/models/map_spec.rb b/spec/models/map_spec.rb
index 8a83947e..b0590edb 100644
--- a/spec/models/map_spec.rb
+++ b/spec/models/map_spec.rb
@@ -1,5 +1,11 @@
 require 'rails_helper'
 
 RSpec.describe Map, type: :model do
-  pending "add some examples to (or delete) #{__FILE__}"
+  # TODO: what is it important to be sure about when working with a Map?
+  it { is_expected.to belong_to :user }
+  it { is_expected.to validate_presence_of :name }
+  it { is_expected.to validate_presence_of :arranged }
+  it { is_expected.to validate_presence_of :permission }
+  it { is_expected.to validate_inclusion_of(:permission).in_array Perm::ISSIONS.map(&:to_s) }
 end
+
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 17c04cd7..23f21101 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -40,4 +40,6 @@ RSpec.configure do |config|
 
   config.include Devise::TestHelpers, type: :controller
   config.include ControllerHelpers, type: :controller
+  config.include Shoulda::Matchers::ActiveModel, type: :model
+  config.include Shoulda::Matchers::ActiveRecord, type: :model
 end