diff --git a/combo/data/models.py b/combo/data/models.py
index 027c89e3..66b9393b 100644
--- a/combo/data/models.py
+++ b/combo/data/models.py
@@ -1170,7 +1170,7 @@ class JsonCellBase(CellBase):
             if json_response.status_code // 100 == 2:
                 if json_response.status_code != 204:  # 204 = No Content
                     try:
-                        extra_context[data_key] = json.loads(json_response.content)
+                        extra_context[data_key] = json_response.json()
                     except ValueError:
                         extra_context[data_key + '_error'] = 'invalid_json'
                         logger = logging.getLogger(__name__)
@@ -1181,7 +1181,7 @@ class JsonCellBase(CellBase):
                         continue
             elif json_response.headers.get('content-type') == 'application/json':
                 try:
-                    extra_context[data_key + '_error'] = json.loads(json_response.content)
+                    extra_context[data_key + '_error'] = json_response.json()
                 except ValueError:
                     extra_context[data_key + '_error'] = 'invalid_json'
 
diff --git a/tests/test_cells.py b/tests/test_cells.py
index 6f2f5f53..dd46fa8c 100644
--- a/tests/test_cells.py
+++ b/tests/test_cells.py
@@ -14,7 +14,7 @@ from django.test.client import RequestFactory
 from django.test.utils import CaptureQueriesContext
 from django.contrib.auth.models import User
 from django.core.urlresolvers import reverse
-from django.utils.encoding import force_text
+from django.utils.encoding import force_text, force_bytes
 
 from combo.data.library import get_cell_classes
 from combo.utils import NothingInCacheException
@@ -23,6 +23,10 @@ from .test_manager import login
 
 pytestmark = pytest.mark.django_db
 
+def mock_json_response(content, **kwargs):
+    content = force_bytes(content)
+    text = force_text(content)
+    return mock.Mock(content=content, text=text, json=lambda: json.loads(text), **kwargs)
 
 def test_cell_reference():
     page = Page()
@@ -215,21 +219,21 @@ def test_json_cell():
 
     with mock.patch('combo.utils.requests.get') as requests_get:
         data = {'data': [{'url': 'xxx', 'text': 'xxx'}]}
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         context = cell.get_cell_extra_context({})
         assert context['json'] == data
         assert context['json_url'] == 'http://example.net/'
         assert context['json_status'] == 200
         assert 'json_error' not in context
 
-        requests_get.return_value = mock.Mock(status_code=204)  # 204 : No Content
+        requests_get.return_value = mock_json_response(content='', status_code=204)  # 204 : No Content
         context = cell.get_cell_extra_context({})
         assert context['json'] is None
         assert context['json_url'] == 'http://example.net/'
         assert context['json_status'] == 204
         assert 'json_error' not in context
 
-        requests_get.return_value = mock.Mock(content='not found', status_code=404,
+        requests_get.return_value = mock_json_response(content='not found', status_code=404,
                                              headers={})
         context = cell.get_cell_extra_context({})
         assert context['json'] is None
@@ -237,7 +241,7 @@ def test_json_cell():
         assert context['json_status'] == 404
         assert 'json_error' not in context
 
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=404,
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=404,
                                               headers={'content-type': 'application/json'})
         context = cell.get_cell_extra_context({})
         assert context['json'] is None
@@ -256,7 +260,7 @@ def test_json_cell():
         assert isinstance(context['json_exception'], requests.ConnectionError)
 
         cell.url = ''  # no URL -> no request, no data, no status
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         context = cell.get_cell_extra_context({})
         assert context['json'] is None
         assert context['json_url'] == ''
@@ -269,7 +273,7 @@ def test_json_cell():
 
     with mock.patch('combo.utils.requests.get') as requests_get:
         data = {'data': [{'url': 'http://a.b', 'text': 'xxx'}]}
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         cell.url = 'http://test4'
         result = cell.render({'synchronous': True})
         assert 'http://a.b' in result
@@ -280,7 +284,7 @@ def test_json_cell():
         assert result == 'xxx'
 
     with mock.patch('combo.utils.requests.get') as requests_get:
-        requests_get.return_value = mock.Mock(content='garbage', status_code=200)
+        requests_get.return_value = mock_json_response(content='garbage', status_code=200)
         cell.url = 'http://test5'
         result = cell.render({'synchronous': True})
         assert result == ''
@@ -296,7 +300,7 @@ def test_json_cell():
     data = {'data': [{'url': 'xxx', 'text': 'xxx'}]}
     cell.url = 'http://testuser?[foobar]'
     with mock.patch('combo.utils.requests.get') as requests_get:
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         context = cell.get_cell_extra_context({'foobar': 'barfoo'})
         assert context['json'] == data
         assert context['json_url'] == 'http://testuser?barfoo'
@@ -313,7 +317,7 @@ def test_json_cell():
     request.user = User(username='foo', email='foo@example.net')
     cell.url = 'http://testuser?email=[user_email]'
     with mock.patch('combo.utils.requests.get') as requests_get:
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         context = cell.get_cell_extra_context({'request': request})
         assert context['json'] == data
         assert context['json_url'] == 'http://testuser?email=foo%40example.net'
@@ -338,7 +342,7 @@ def test_json_cell_with_varnames(app):
 
     with mock.patch('combo.utils.requests.get') as requests_get:
         data = {'data': []}
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
         url = reverse('combo-public-ajax-page-cell',
             kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
         resp = app.get(url + '?var1=foo&var2=bar') # request query string is here
@@ -363,7 +367,7 @@ def test_config_json_cell():
         assert cell.css_class_names.split() == ['configjsoncell', 'foobar']
 
         with mock.patch('combo.utils.requests.get') as requests_get:
-            requests_get.return_value = mock.Mock(content=json.dumps({'hello': 'world'}), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps({'hello': 'world'}), status_code=200)
             context = cell.get_cell_extra_context({'request': request})
             assert context['json'] == {'hello': 'world'}
             assert context['json_url'] == 'http://test/'
@@ -404,7 +408,7 @@ def test_config_json_cell_with_varnames(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': []}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
             resp = app.get(url + '?var1=foo&var2=bar') # request query string is here
@@ -458,7 +462,7 @@ def test_config_json_cell_with_param_in_url(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': []}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
             resp = app.get(url)
@@ -473,7 +477,7 @@ def test_json_force_async():
     cell.template_string = '{{json.hello}}'
     cell.force_async = True
     with mock.patch('combo.utils.requests_wrapper.RequestsSession.request') as requests_get:
-        requests_get.return_value = mock.Mock(content=json.dumps({'hello': 'world'}), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps({'hello': 'world'}), status_code=200)
         with pytest.raises(NothingInCacheException):
             cell.render({})
         assert cell.render({'synchronous': True}) == 'world'
@@ -489,7 +493,7 @@ def test_json_force_async():
     cell.template_string = '{{json.hello}}'
     cell.force_async = False
     with mock.patch('combo.utils.requests_wrapper.RequestsSession.request') as requests_get:
-        requests_get.return_value = mock.Mock(content=json.dumps({'hello': 'world2'}), status_code=200)
+        requests_get.return_value = mock_json_response(content=json.dumps({'hello': 'world2'}), status_code=200)
         # raise if nothing in cache
         with pytest.raises(NothingInCacheException):
             cell.render({})
@@ -522,7 +526,7 @@ def test_config_json_cell_additional_url(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': 'toto'}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
             resp = app.get(url)
@@ -537,7 +541,7 @@ def test_config_json_cell_additional_url(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': 'toto'}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=404,
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=404,
                                                   headers={'content-type': 'application/json'})
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
@@ -558,7 +562,7 @@ def test_config_json_cell_additional_url(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': 'toto'}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
             context = cell.get_cell_extra_context({})
             assert context['json'] == data
             assert context['json_url'] == 'http://foo'
@@ -591,7 +595,7 @@ def test_config_json_cell_additional_url(app):
         data = {'data': 'bar'}
 
         with mock.patch('combo.utils.requests.get') as requests_get:
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=200)
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
             resp = app.get(url)
@@ -618,7 +622,7 @@ def test_config_json_cell_additional_url(app):
             assert context['plop2_status'] == 200
 
         with mock.patch('combo.utils.requests.get') as requests_get:
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=404,
+            requests_get.return_value = mock_json_response(content=json.dumps(data), status_code=404,
                                                   headers={'content-type': 'application/json'})
             url = reverse('combo-public-ajax-page-cell',
                 kwargs={'page_pk': page.id, 'cell_reference': cell.get_reference()})
diff --git a/tests/test_manager.py b/tests/test_manager.py
index 1f87e4b7..f9426f72 100644
--- a/tests/test_manager.py
+++ b/tests/test_manager.py
@@ -1102,7 +1102,7 @@ def test_page_versionning(app, admin_user):
 
     with mock.patch('combo.utils.requests.get') as requests_get:
         data = {'data': [{'url': 'xxx', 'text': 'xxx'}]}
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock.Mock(json=lambda: data, status_code=200)
         resp3 = app.get(json_cell_url)
         assert resp3.text.strip() == 'CxxxD'
 
@@ -1112,7 +1112,7 @@ def test_page_versionning(app, admin_user):
 
     with mock.patch('combo.utils.requests.get') as requests_get:
         data = {'data': [{'url': 'xxx', 'text': 'xxx'}]}
-        requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+        requests_get.return_value = mock.Mock(json=lambda: data, status_code=200)
         resp3 = app.get(json_cell_url)
         assert resp3.text.strip() == 'AxxxB'
 
diff --git a/tests/test_search.py b/tests/test_search.py
index 12ac50bf..2ee67ebd 100644
--- a/tests/test_search.py
+++ b/tests/test_search.py
@@ -157,7 +157,7 @@ def test_search_global_context(app):
 
         with mock.patch('combo.utils.requests.get') as requests_get:
             data = {'data': []}
-            requests_get.return_value = mock.Mock(content=json.dumps(data), status_code=200)
+            requests_get.return_value = mock.Mock(json=lambda: data, status_code=200)
             resp = app.get(url)
             assert requests_get.call_args[0][0] == 'http://www.example.net/search/foo/'