diff --git a/oidc_provider/lib/claims.py b/oidc_provider/lib/claims.py
index 4330ee3..16e3919 100644
--- a/oidc_provider/lib/claims.py
+++ b/oidc_provider/lib/claims.py
@@ -60,8 +60,11 @@ class ScopeClaims(object):
             if value is None or value == '':
                 del aux_dic[key]
             elif type(value) is dict:
-                aux_dic[key] = self._clean_dic(value)
-
+                cleaned_dict = self._clean_dic(value)
+                if not cleaned_dict:
+                    del aux_dic[key]
+                    continue
+                aux_dic[key] = cleaned_dict
         return aux_dic
 
     @classmethod
diff --git a/oidc_provider/tests/test_claims.py b/oidc_provider/tests/test_claims.py
new file mode 100644
index 0000000..92429b3
--- /dev/null
+++ b/oidc_provider/tests/test_claims.py
@@ -0,0 +1,46 @@
+from django.test import TestCase
+from oidc_provider.lib.claims import ScopeClaims
+from oidc_provider.tests.app.utils import create_fake_user
+
+
+class ClaimsTestCase(TestCase):
+
+    def setUp(self):
+        self.user = create_fake_user()
+        self.scopes = ['openid', 'address', 'email', 'phone', 'profile']
+        self.scopeClaims = ScopeClaims(self.user, self.scopes)
+
+    def test_clean_dic(self):
+        """ assert that _clean_dic function returns a clean dictionnary
+            (no empty claims) """
+        dict_to_clean = {
+            'phone_number_verified': '',
+            'middle_name': '',
+            'name': 'John Doe',
+            'website': '',
+            'profile': '',
+            'family_name': 'Doe',
+            'birthdate': '',
+            'preferred_username': '',
+            'picture': '',
+            'zoneinfo': '',
+            'locale': '',
+            'gender': '',
+            'updated_at': '',
+            'address': {},
+            'given_name': 'John',
+            'email_verified': '',
+            'nickname': '',
+            'email': u'johndoe@example.com',
+            'phone_number': '',
+        }
+        clean_dict = self.scopeClaims._clean_dic(dict_to_clean)
+        self.assertEquals(
+            clean_dict,
+            {
+                'family_name': 'Doe',
+                'given_name': 'John',
+                'name': 'John Doe',
+                'email': u'johndoe@example.com'
+            }
+        )