 			copy = utils.clone list
 
 	afterEach ->
-		expect(ok).toBeTruthy()
+		assert.ok ok
 		list.onInsert.disconnect listener
 
 	it 'works with append()', ->

			copy = utils.clone list

	afterEach ->
		expect(ok).toBeTruthy()
		list.onChange.disconnect listener

	it 'works with set()', ->


		list.remove 2

		assert.isEqual args, [[2, 1]]
		assert.isEqual copy.toArray(), [1]

	it 'works with clear()', ->
		list = List [1, 2]
