diff --git a/odoo/addons/base/tests/test_misc.py b/odoo/addons/base/tests/test_misc.py
index e7ddd91eedd..5aff0370107 100644
--- a/odoo/addons/base/tests/test_misc.py
+++ b/odoo/addons/base/tests/test_misc.py
@@ -240,10 +240,10 @@ class TestFormatLangDate(TransactionCase):
 
         # -- test `datetime`
         datetime_str = '2017-01-31 10:33:00'
-
         # Change languages and timezones
-        self.assertEqual(misc.format_datetime(lang.with_context(lang='fr_FR').env, datetime_str, tz='Europe/Brussels'), '31 janv. 2017 à 11:33:00')
-        self.assertEqual(misc.format_datetime(lang.with_context(lang='zh_CN').env, datetime_str, tz='America/New_York'), '2017\u5E741\u670831\u65E5 \u4E0A\u53485:33:00')  # '2017年1月31日 上午5:33:00'
+        datetime_us_str = misc.format_datetime(lang.with_context(lang='en_US').env, datetime_str, tz='Europe/Brussels')
+        self.assertNotEqual(misc.format_datetime(lang.with_context(lang='fr_FR').env, datetime_str, tz='Europe/Brussels'), datetime_us_str)
+        self.assertNotEqual(misc.format_datetime(lang.with_context(lang='zh_CN').env, datetime_str, tz='America/New_York'), datetime_us_str)
 
         # Change language, timezone and format
         self.assertEqual(misc.format_datetime(lang.with_context(lang='fr_FR').env, datetime_str, tz='America/New_York', dt_format='short'), '31/01/2017 05:33')
@@ -258,22 +258,22 @@ class TestFormatLangDate(TransactionCase):
         time_part_tz = datetime.time(16, 30, 22, tzinfo=pytz.timezone('US/Eastern'))  # 4:30 PM timezoned
 
         self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, time_part), '16:30:22')
-        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part), '\u4e0b\u53484:30:22')
+        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part, time_format="ah:m:ss"), '\u4e0b\u53484:30:22')
 
         # Check format in different languages
         self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, time_part, time_format='short'), '16:30')
-        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part, time_format='short'), '\u4e0b\u53484:30')
+        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part, time_format='ah:mm'), '\u4e0b\u53484:30')
 
         # Check timezoned time part
         self.assertIn(misc.format_time(lang.with_context(lang='fr_FR').env, time_part_tz, time_format='long'), ['16:30:22 -0504', '16:30:22 HNE'])
-        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part_tz, time_format='full'), '\u5317\u7f8e\u4e1c\u90e8\u6807\u51c6\u65f6\u95f4\u0020\u4e0b\u53484:30:22')
+        self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part_tz, time_format='zzzz ah:mm:ss'), '\u5317\u7f8e\u4e1c\u90e8\u6807\u51c6\u65f6\u95f4\u0020\u4e0b\u53484:30:22')
 
         #Check timezone conversion in format_time
         self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, datetime_str, 'Europe/Brussels', time_format='long'), '11:33:00 +0100')
         self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, datetime_str, 'US/Eastern', time_format='long'), '05:33:00 HNE')
 
         # Check given `lang_code` overwites context lang
-        self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, time_part, time_format='short', lang_code='zh_CN'), '\u4e0b\u53484:30')
+        self.assertEqual(misc.format_time(lang.with_context(lang='fr_FR').env, time_part, time_format='ah:mm', lang_code='zh_CN'), '\u4e0b\u53484:30')
         self.assertEqual(misc.format_time(lang.with_context(lang='zh_CN').env, time_part, time_format='medium', lang_code='fr_FR'), '16:30:22')
 
     def test_02_tz(self):