diff --git a/pygameMenu/__init__.py b/pygameMenu/__init__.py
index a0399a98..cb69dfc2 100644
--- a/pygameMenu/__init__.py
+++ b/pygameMenu/__init__.py
@@ -36,10 +36,10 @@
 import pygameMenu.events
 import pygameMenu.font
 import pygameMenu.locals
+import pygameMenu.sound
 import pygameMenu.version
 
 from pygameMenu.menu import Menu
-from pygameMenu.sound import Sound
 from pygameMenu.textmenu import TextMenu
 
 # Other
diff --git a/pygameMenu/menu.py b/pygameMenu/menu.py
index a036bb90..ad19f3d6 100755
--- a/pygameMenu/menu.py
+++ b/pygameMenu/menu.py
@@ -867,10 +867,12 @@ def _check_menu_initialized(self):
         """
         Check menu initialization.
 
-        :return: None
+        :return: True if menu is initialized, raise Exception if not
+        :rtype: bool
         """
         if self._top is None:
             raise Exception('The menu has not been initialized yet, try using mainloop function')
+        return True
 
     def mainloop(self, events=None, disable_loop=False):
         """
@@ -989,7 +991,7 @@ def set_sound(self, sound, recursive=False):
         Set sound engine to a menu.
 
         :param sound: Sound object
-        :type sound: pygameMenu.sound.Sound
+        :type sound: pygameMenu.sound.Sound, NoneType
         :param recursive: Set the sound engine to all submenus
         :type recursive: bool
         :return: None
diff --git a/test/test_menu.py b/test/test_menu.py
index 5ce782f5..45ba8172 100644
--- a/test/test_menu.py
+++ b/test/test_menu.py
@@ -41,6 +41,28 @@ def setUp(self):
         self.menu = PygameMenuUtils.generic_menu('mainmenu')
         self.menu.mainloop()
 
+    def test_enabled(self):
+        """
+        Test menu enable/disable feature.
+        """
+        menu = PygameMenuUtils.generic_menu()
+        self.assert_(menu.is_disabled())
+        menu.enable()
+        self.assert_(menu.is_enabled())
+        self.assert_(not menu.is_disabled())
+
+        # Intialize and close
+        menu.mainloop()
+        menu._close()
+
+    def test_initialization(self):
+        """
+        Test initialization of the menu.
+        """
+        self.assert_(self.menu._check_menu_initialized())
+        menu_not_initializated = PygameMenuUtils.generic_menu()
+        self.assertRaises(Exception, lambda: menu_not_initializated._check_menu_initialized())
+
     def test_depth(self):
         """
         Test depth of a menu.
diff --git a/test/test_sound.py b/test/test_sound.py
index e5fa5e1a..fd0f99d1 100644
--- a/test/test_sound.py
+++ b/test/test_sound.py
@@ -77,3 +77,19 @@ def test_example_sounds(self):
         self.sound.play_key_add()
         self.sound.play_key_del()
         self.sound.play_open_menu()
+
+    def test_sound_menu(self):
+        """
+        Test sounds in menu.
+        """
+        menu = PygameMenuUtils.generic_menu()
+        submenu = PygameMenuUtils.generic_menu()
+
+        menu.add_option('submenu', submenu)
+        button = menu.add_option('button', lambda: None)
+        menu.set_sound(self.sound, True)
+        self.assertEqual(button.sound, self.sound)
+
+        # This will remove the sound engine
+        menu.set_sound(None, True)
+        self.assertNotEqual(button.sound, self.sound)