diff --git a/test/test_custom_render.py b/test/test_custom_render.py
index 6f3fc7d3..9032763a 100644
--- a/test/test_custom_render.py
+++ b/test/test_custom_render.py
@@ -55,9 +55,13 @@ def test_custom_template_for_chart():
         'name': '雪纺衫',
         'value': 36
     }]
+
+    data1 = {'衬衫': '34', '羊毛衫': 45, '雪纺衫': 40}
     names, values = Bar.cast(data)
+    names1, values1 = Bar.cast(data1)
     bar = Bar("柱状图数据堆叠示例")
     bar.add("商家A", names, values, is_stack=True)
+    bar.add("商家B", names1, values1, is_stack=True)
     bar.render(new_version=True, path='new_version_bar.html')
     with codecs.open('new_version_bar.html', 'r', 'utf-8') as f:
         actual_content = f.read()
diff --git a/test/test_utils.py b/test/test_utils.py
index c381d931..1b43b3ab 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -46,13 +46,13 @@ def test_write_utf8_html_file():
 
 def test_json_encoder():
     data = date(2017, 1, 1)
-    expected = '{\n"date": "2017-01-01"\n}'
-    eq_(expected, json_dumps({'date': data}))
+    v = json_dumps({'date': data, 'a': '1'})
+    print(v)
+    assert v in (
+        '{\n"a": "1",\n"date": "2017-01-01"\n}',
+        '{\n"date": "2017-01-01",\n"a": "1"\n}'
+    )
 
-    # data2 = {'np_list': np.array(['a', 'b', 'c'])}
-    # expected2 = '{\n"np_list": [\n"a",\n"b",\n"c"\n]\n}'
-    # eq_(expected2, json_dumps(data2))
-    #
-    # data3 = {'list': ['a', 'b', 'c']}
-    # expected3 = '{\n"list": [\n"a",\n"b",\n"c"\n]\n}'
-    # eq_(expected3, json_dumps(data3))
+    data2 = {'np_list': np.array(['a', 'b', 'c'])}
+    data2_e = {'np_list': ['a', 'b', 'c']}
+    eq_(json_dumps(data2_e), json_dumps(data2))