diff --git a/github/GithubObject.UnitTest.py b/github/GithubObject.UnitTest.py
index 3d1c63cc..29cb6006 100644
--- a/github/GithubObject.UnitTest.py
+++ b/github/GithubObject.UnitTest.py
@@ -194,7 +194,7 @@ class GithubObjectWithComplexAttribute( TestCaseWithGithubTestObject ):
         self.expectDataGet( "/test/a3s/id1" ).andReturn( { "desc": "desc1" } )
         self.assertEqual( self.o.a3.desc, "desc1" )
 
-class GithubObjectWithListOfReferences( TestCaseWithGithubTestObject ):
+class GithubObjectWithListGetableList( TestCaseWithGithubTestObject ):
     ContainedObject = GithubObject(
         "ContainedObject",
         BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
@@ -221,29 +221,7 @@ class GithubObjectWithListOfReferences( TestCaseWithGithubTestObject ):
         a3s = self.o.get_a3s( "foobar" )
         self.assertEqual( len( a3s ), 3 )
 
-class GithubObjectWithListGetableList( TestCaseWithGithubTestObject ):
-    ContainedObject = GithubObject(
-        "ContainedObject",
-        BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
-        BasicAttributes( "id", "name" )
-    )
-
-    GithubTestObject = GithubObject(
-        "GithubTestObject",
-        BaseUrl( lambda obj: "/test" ),
-        BasicAttributes( "a1", "a2" ),
-        ListOfObjects( "a3s", ContainedObject, ListGetable( [], [] ) )
-    )
-
-    def testGetList( self ):
-        self.expectDataGet( "/test/a3s", {} ).andReturn( [ { "id": "id1" }, { "id": "id2" }, { "id": "id3" } ] )
-        a3s = self.o.get_a3s()
-        self.assertEqual( len( a3s ), 3 )
-        self.assertEqual( a3s[ 0 ].id, "id1" )
-        self.expectDataGet( "/test/a3s/id1" ).andReturn( { "name": "name1" } )
-        self.assertEqual( a3s[ 0 ].name, "name1" )
-
-class GithubObjectWithModifiableListOfReferences( TestCaseWithGithubTestObject ):
+class GithubObjectWithElementAddableList( TestCaseWithGithubTestObject ):
     ContainedObject = GithubObject(
         "ContainedObject",
         BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
@@ -255,7 +233,7 @@ class GithubObjectWithModifiableListOfReferences( TestCaseWithGithubTestObject )
         "GithubTestObject",
         BaseUrl( lambda obj: "/test" ),
         BasicAttributes( "a1", "a2" ),
-        ListOfObjects( "a3s", ContainedObject, ListGetable( [], [] ), ElementAddable(), ElementRemovable(), ElementHasable() )
+        ListOfObjects( "a3s", ContainedObject, ElementAddable() )
     )
 
     def testAddToList( self ):
@@ -263,11 +241,41 @@ class GithubObjectWithModifiableListOfReferences( TestCaseWithGithubTestObject )
         self.expectStatusPut( "/test/a3s/idAdd" ).andReturn( 204 )
         self.o.add_to_a3s( a3ToAdd )
 
+class GithubObjectWithElementRemovableList( TestCaseWithGithubTestObject ):
+    ContainedObject = GithubObject(
+        "ContainedObject",
+        BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
+        Identity( lambda obj: obj.id ),
+        BasicAttributes( "id", "name" ),
+    )
+
+    GithubTestObject = GithubObject(
+        "GithubTestObject",
+        BaseUrl( lambda obj: "/test" ),
+        BasicAttributes( "a1", "a2" ),
+        ListOfObjects( "a3s", ContainedObject, ElementRemovable() )
+    )
+
     def testRemoveFromList( self ):
         a3ToRemove = self.ContainedObject( self.g.object, { "id": "idRemove", "name": "nameRemove" }, lazy = True )
         self.expectStatusDelete( "/test/a3s/idRemove" ).andReturn( 204 )
         self.o.remove_from_a3s( a3ToRemove )
 
+class GithubObjectWithElementHasableList( TestCaseWithGithubTestObject ):
+    ContainedObject = GithubObject(
+        "ContainedObject",
+        BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
+        Identity( lambda obj: obj.id ),
+        BasicAttributes( "id", "name" ),
+    )
+
+    GithubTestObject = GithubObject(
+        "GithubTestObject",
+        BaseUrl( lambda obj: "/test" ),
+        BasicAttributes( "a1", "a2" ),
+        ListOfObjects( "a3s", ContainedObject, ElementHasable() )
+    )
+
     def testHasInList( self ):
         a3ToQuery = self.ContainedObject( self.g.object, { "id": "idQuery", "name": "nameQuery" }, lazy = True )
         self.expectStatusGet( "/test/a3s/idQuery" ).andReturn( 204 )
@@ -314,24 +322,6 @@ class GithubObjectWithElementCreatableList( TestCaseWithGithubTestObject ):
         with self.assertRaises( TypeError ):
             self.o.create_a3( foobar = 42 )
 
-class GithubObjectWithObjectGetter( TestCaseWithGithubTestObject ):
-    ContainedObject = GithubObject(
-        "ContainedObject",
-        BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
-        BasicAttributes( "id", "name" )
-    )
-
-    GithubTestObject = GithubObject(
-        "GithubTestObject",
-        BaseUrl( lambda obj: "/test" ),
-        BasicAttributes( "a1", "a2" ),
-        ObjectGetter( "a3", ContainedObject, lambda obj, id : { "id": id } )
-    )
-
-    def testGetList( self ):
-        self.expectDataGet( "/test/a3s/idGet" ).andReturn( { "id": "idGet" } )
-        self.assertEqual( self.o.get_a3( "idGet" ).id, "idGet" )
-
 class GithubObjectWithElementGetableList( TestCaseWithGithubTestObject ):
     ContainedObject = GithubObject(
         "ContainedObject",
@@ -350,6 +340,24 @@ class GithubObjectWithElementGetableList( TestCaseWithGithubTestObject ):
         self.expectDataGet( "/test/a3s/idGet" ).andReturn( { "id": "idGet" } )
         self.assertEqual( self.o.get_a3( "idGet" ).id, "idGet" )
 
+class GithubObjectWithObjectGetter( TestCaseWithGithubTestObject ):
+    ContainedObject = GithubObject(
+        "ContainedObject",
+        BaseUrl( lambda obj: "/test/a3s/" + obj.id ),
+        BasicAttributes( "id", "name" )
+    )
+
+    GithubTestObject = GithubObject(
+        "GithubTestObject",
+        BaseUrl( lambda obj: "/test" ),
+        BasicAttributes( "a1", "a2" ),
+        ObjectGetter( "a3", ContainedObject, lambda obj, id : { "id": id } )
+    )
+
+    def testGetList( self ):
+        self.expectDataGet( "/test/a3s/idGet" ).andReturn( { "id": "idGet" } )
+        self.assertEqual( self.o.get_a3( "idGet" ).id, "idGet" )
+
 def myCallable( obj, mock, arg ):
     return mock.call( arg )