diff --git a/neutron_vpnaas/services/vpn/device_drivers/cisco_csr_rest_client.py b/neutron_vpnaas/services/vpn/device_drivers/cisco_csr_rest_client.py
index 8e017b189..64f200b31 100644
--- a/neutron_vpnaas/services/vpn/device_drivers/cisco_csr_rest_client.py
+++ b/neutron_vpnaas/services/vpn/device_drivers/cisco_csr_rest_client.py
@@ -90,7 +90,7 @@ class CsrRestClient(object):
         if method == 'POST' and self.status == requests.codes.CREATED:
             return response.headers.get('location', '')
         if self.status >= requests.codes.BAD_REQUEST and response.content:
-            if 'error-code' in response.content:
+            if b'error-code' in response.content:
                 content = jsonutils.loads(response.content)
                 LOG.debug("Error response content %s", content)
                 return content
diff --git a/tox.ini b/tox.ini
index b9e158257..a4e005459 100644
--- a/tox.ini
+++ b/tox.ini
@@ -94,6 +94,7 @@ commands = python -m testtools.run \
     neutron_vpnaas.tests.unit.extensions.test_vpnaas \
     neutron_vpnaas.tests.unit.services.vpn.device_drivers.test_ipsec \
     neutron_vpnaas.tests.unit.services.vpn.device_drivers.test_cisco_ipsec \
+    neutron_vpnaas.tests.unit.services.vpn.device_drivers.test_cisco_csr_rest_client \
     neutron_vpnaas.tests.unit.services.vpn.test_vpn_service \
     neutron_vpnaas.tests.unit.services.vpn.test_vyatta_vpn_service \
     neutron_vpnaas.tests.unit.services.vpn.service_drivers.test_vyatta_ipsec \