diff --git a/lib/sashimi/repositories/abstract_repository.rb b/lib/sashimi/repositories/abstract_repository.rb
index f303172..9ad6fda 100644
--- a/lib/sashimi/repositories/abstract_repository.rb
+++ b/lib/sashimi/repositories/abstract_repository.rb
@@ -117,7 +117,7 @@ def scm_remove(file)
       # Execute the given command for the current SCM system used by the Rails app.
       def scm_command(command, file)
         scm = guess_version_control_system
-        system("#{scm} #{command} #{file}")
+        Kernel.system("#{scm} #{command} #{file}")
       end
 
       def local_repository_path #:nodoc:
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 92a038c..9b7634e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -68,10 +68,10 @@ def create_plugin(name, url = nil)
     Plugin.new(name, url)
   end
 
-  def cached_plugin
-    { 'sashimi' => {'type' => 'git'}, 
+  def cached_plugins
+    { 'plug-in' => {'type' => 'svn'},
       'plugin'  => {'type' => 'svn'},
-      'plug-in' => {'type' => 'svn'} }
+      'sashimi' => {'type' => 'git'} }
   end
 
   def cache_file
@@ -100,7 +100,7 @@ def prepare_installation
   end
 
   def create_cache_file
-    File.open(cache_file, 'w+'){|f| f.write(cached_plugin.to_yaml)}
+    File.open(cache_file, 'w+'){|f| f.write(cached_plugins.to_yaml)}
   end
   
   def with_local_repository_path(&block)
diff --git a/test/unit/repositories/abstract_repository_test.rb b/test/unit/repositories/abstract_repository_test.rb
index 071eb5b..656b807 100644
--- a/test/unit/repositories/abstract_repository_test.rb
+++ b/test/unit/repositories/abstract_repository_test.rb
@@ -16,6 +16,10 @@ def test_cache_file
     assert_equal cache_file, repository.class.cache_file
   end
   
+  def test_plugins_names
+    assert_equal cached_plugins.keys.sort, repository.class.plugins_names
+  end
+  
   ### COMMANDS
   
   # ADD
@@ -48,4 +52,84 @@ def test_should_raise_exception_on_uninstalling_missing_plugin
       create_repository('unexistent').uninstall
     end
   end
+  
+  # LIST
+  # TODO cleanup
+  def test_should_list_installed_plugins
+    assert_equal "plug-in\t\t\nplugin\t\t\nsashimi\t\t", repository.class.list
+  end
+    
+  ### SCM
+  
+  uses_mocha 'AbstractRepositoryTestSCM' do
+    def test_guess_version_control_system
+      File.expects(:exists?).with('.git').returns true
+      assert_equal :git, repository.class.guess_version_control_system
+      
+      File.expects(:exists?).with('.git').returns false
+      assert_equal :svn, repository.class.guess_version_control_system      
+    end
+    
+    def test_scm_command
+      File.stubs(:exists?).with('.git').returns true
+      Kernel.expects(:system).with('git add file.rb')
+      repository.class.scm_command('add', 'file.rb')
+    end
+    
+    def test_scm_add
+      File.stubs(:exists?).with('.git').returns true
+      Kernel.expects(:system).with('git add file.rb')
+      repository.class.scm_add('file.rb')
+    end
+    
+    def test_scm_remove
+      File.stubs(:exists?).with('.git').returns true
+      Kernel.expects(:system).with('git rm file.rb')
+      repository.class.scm_remove('file.rb')      
+    end
+    
+    def test_under_version_control
+      Dir.expects(:glob).with(".{git,svn}").returns %w(.git)
+      assert repository.class.under_version_control?
+    end    
+  end
+  
+  def test_git_url
+    assert repository.class.git_url?(plugin.url)
+    assert repository.class.git_url?(plugin.url.gsub('git:', 'http:'))
+    assert_not repository.class.git_url?('http://repository.com/plugin/trunk')
+  end
+  
+  ### PATH
+  
+  uses_mocha 'AbstractRepositoryTestPath' do
+    def test_local_repository_path
+      AbstractRepository.stubs(:find_home).returns '/Users/luca'
+      File.stubs(:SEPARATOR).returns '/'
+      expected = [ repository.class.find_home, repository.class.plugins_path ].to_path
+      assert_equal expected, repository.local_repository_path
+    end
+  end
+  
+  def test_path_to_rails_app
+    with_path rails_app_path do
+      assert_equal Dir.pwd, repository.class.path_to_rails_app
+    end
+  end
+  
+  def test_absolute_rails_plugins_path
+    with_path rails_app_path do
+      expected = "#{Dir.pwd}/vendor/plugins".to_path
+      assert_equal expected, repository.class.absolute_rails_plugins_path
+    end
+  end
+  
+  def test_rails_plugins_path
+    assert_equal 'vendor/plugins'.to_path, repository.class.rails_plugins_path
+  end
+  
+  def test_plugin_path
+    expected = [ plugins_path, repository.plugin.name ].to_path
+    assert_equal expected, repository.plugin_path
+  end
 end