diff --git a/tests.py b/tests.py
index e3dc5a8..239adb3 100644
--- a/tests.py
+++ b/tests.py
@@ -1,6 +1,5 @@
 import logging
-import sys
-import unittest
+import requests
 import usabilla as ub
 
 from mock import Mock
@@ -64,16 +63,18 @@ def test_client_constants(self):
         self.assertEqual(self.client.method, 'GET')
         self.assertEqual(self.client.host, 'data.usabilla.com')
         self.assertEqual(self.client.host_protocol, 'https://')
-        self.assertEqual('',self.client.query_parameters)
+        self.assertEqual('', self.client.query_parameters)
 
     def test_sign_key(self):
         signed_key = self.client.sign(self.secret_key.encode('utf-8'), 'usbl1_request'.encode('utf-8'))
-        self.assertEqual(signed_key,  b"&-\x88\x80Z9\xe8Pnvx\xe4S\xeeZ\x9fG\xc5\xf7g\x11|\xc1\xaa~q(\xef\xaf\x95\xc0\xac")
+        self.assertEqual(
+            signed_key,  b"&-\x88\x80Z9\xe8Pnvx\xe4S\xeeZ\x9fG\xc5\xf7g\x11|\xc1\xaa~q(\xef\xaf\x95\xc0\xac")
 
     def test_get_signature_key(self):
         datestamp = '20150115'
         signing_key = self.client.get_signature_key(self.secret_key, datestamp)
-        self.assertEqual(signing_key, b"\x15\x8d\xd7U\xceG\xdeH\x8aHwU\xf5qg\xae\xd4Z\x19`\xedM\x80\x87\x97V\xbf\xe9pw\xaa\xae")
+        self.assertEqual(
+            signing_key, b"\x15\x8d\xd7U\xceG\xdeH\x8aHwU\xf5qg\xae\xd4Z\x19`\xedM\x80\x87\x97V\xbf\xe9pw\xaa\xae")
 
     def test_query_parameters(self):
         params = {'limit': 1}
@@ -131,9 +132,9 @@ def test_item_iterator(self):
             index += 1
         self.client.set_query_parameters.assert_called_with({'since': 1400000000002})
         self.assertEqual(self.client.send_signed_request.call_count, 2)
-        self.client.send_signed_request.side_effect = ub.GeneralError('mocked', 'error')
-        for item in self.client.item_iterator('/some/url'):
-            raise ub.GeneralError('should not', 'come here')
+        self.client.send_signed_request.side_effect = requests.exceptions.HTTPError('mocked error')
+        with self.assertRaises(requests.exceptions.HTTPError):
+            list(self.client.item_iterator('/some/url'))
 
     def test_get_resource(self):
         self.client.item_iterator = Mock()
diff --git a/usabilla.py b/usabilla.py
index 49fe12f..74b1b71 100644
--- a/usabilla.py
+++ b/usabilla.py
@@ -72,11 +72,11 @@ class APIClient(object):
     """
 
     resources = {
-        'scopes' : {
+        'scopes': {
             'live': {
                 'products': {
                     'websites': {
-                        'resources' : {
+                        'resources': {
                             'button': '/button',
                             'feedback': '/button/:id/feedback',
                             'campaign': '/campaign',
@@ -87,13 +87,13 @@ class APIClient(object):
                         }
                     },
                     'email': {
-                        'resources' : {
+                        'resources': {
                             'button': '/button',
                             'feedback': '/button/:id/feedback'
                         }
                     },
                     'apps': {
-                        'resources' : {
+                        'resources': {
                             'app': '',
                             'feedback': '/:id/feedback',
                             'campaign': '/campaign',
@@ -238,12 +238,9 @@ def send_signed_request(self, scope):
         # Send the request.
         request_url = self.host + scope + '?' + canonical_querystring
         r = requests.get(self.host_protocol + request_url, headers=headers)
+        r.raise_for_status()
 
-        if r.status_code != 200:
-            return r
-        else:
-            return r.json()
-
+        return r.json()
 
     def check_resource_validity(self, scope, product, resource):
         """Checks whether the resource exists
@@ -287,7 +284,7 @@ def handle_id(self, url, resource_id):
             if resource_id == '':
                 raise GeneralError('invalid id', 'Invalid resource ID')
             if resource_id == '*':
-               resource_id = '%2A'
+                resource_id = '%2A'
 
             url = url.replace(':id', str(resource_id))
 
@@ -300,20 +297,17 @@ def item_iterator(self, url):
 
         :type url: str
 
-        :returns: An `generator` that yeilds the requested data.
+        :returns: A `generator` that yields the requested data.
         :rtype: generator
+        :raises requests.exceptions.HTTPError: if an HTTP error occurred
         """
         has_more = True
         while has_more:
-            try:
-                results = self.send_signed_request(url)
-                has_more = results['hasMore']
-                for item in results['items']:
-                    yield item
-                self.set_query_parameters({'since': results['lastTimestamp']})
-            except:
-                return
-
+            results = self.send_signed_request(url)
+            has_more = results['hasMore']
+            for item in results['items']:
+                yield item
+            self.set_query_parameters({'since': results['lastTimestamp']})
 
     def get_resource(self, scope, product, resource, resource_id=None, iterate=False):
         """Retrieves resources of the specified type
@@ -330,7 +324,7 @@ def get_resource(self, scope, product, resource, resource_id=None, iterate=False
         :type resource_id: str
         :type iterate: bool
 
-        :returns: An `generator` that yeilds the requested data or a single resource
+        :returns: A `generator` that yields the requested data or a single resource
         :rtype: generator or single resource
         """
         url = self.handle_id(self.check_resource_validity(scope, product, resource), resource_id)