diff --git a/requirements/requirements-optionals.txt b/requirements/requirements-optionals.txt
index e0bd25091..f1adabecf 100644
--- a/requirements/requirements-optionals.txt
+++ b/requirements/requirements-optionals.txt
@@ -1,6 +1,6 @@
 # Optional packages which may be used with REST framework.
 pytz==2017.2
-psycopg2==2.7.3
+psycopg2==2.7.4
 markdown==2.6.4
 django-guardian==1.4.9
 django-filter==1.1.0
diff --git a/tests/test_model_serializer.py b/tests/test_model_serializer.py
index d865350fb..b7d31e2bd 100644
--- a/tests/test_model_serializer.py
+++ b/tests/test_model_serializer.py
@@ -402,7 +402,7 @@ class TestGenericIPAddressFieldValidation(TestCase):
                          '{0}'.format(s.errors))
 
 
-@pytest.mark.skipUnless(postgres_fields, 'postgres is required')
+@pytest.mark.skipif('not postgres_fields')
 class TestPosgresFieldsMapping(TestCase):
     def test_hstore_field(self):
         class HStoreFieldModel(models.Model):