[tests] install pytest-responses
diff --git a/setup.py b/setup.py
index 47a0b818d2ab2e..e1437ba23ca51b 100755
--- a/setup.py
+++ b/setup.py
@@ -79,6 +79,7 @@
     # /cassandra
     'datadog',
     'pytest-cov>=1.8.0,<1.9.0',
+    'pytest-responses',
     'pytest-timeout>=0.5.0,<0.6.0',
     'pytest-xdist>=1.11.0,<1.12.0',
     'python-coveralls',
diff --git a/src/sentry/testutils/cases.py b/src/sentry/testutils/cases.py
index 5023719f5caba5..4142ca31ebae6c 100644
--- a/src/sentry/testutils/cases.py
+++ b/src/sentry/testutils/cases.py
@@ -448,6 +448,7 @@ def invoke(self, *args):
 
 
 @pytest.mark.usefixtures('browser')
+@pytest.mark.withoutresponses
 class AcceptanceTestCase(TransactionTestCase):
     def save_session(self):
         self.session.save()
