diff --git a/tests/test_misc.py b/tests/test_misc.py
index e3ca9a138..0abd3c1a4 100644
--- a/tests/test_misc.py
+++ b/tests/test_misc.py
@@ -158,9 +158,9 @@ def test_simplify_mix():
 def test_json_str_decoder():
     json_str = json.dumps({'lst': [{'a': 'b'}, 1, 2], 'bla': u'éléphant'})
 
-    assert type(list(json_loads(json_str).keys())[0]) is str
-    assert type(json_loads(json_str)['lst'][0]['a']) is str
-    assert type(json_loads(json_str)['bla']) is str
+    assert isinstance(list(json_loads(json_str).keys())[0], str)
+    assert isinstance(json_loads(json_str)['lst'][0]['a'], str)
+    assert isinstance(json_loads(json_str)['bla'], str)
     assert json_loads(json_str)['bla'] == force_str(u'éléphant')