diff --git a/kuryr_kubernetes/clients.py b/kuryr_kubernetes/clients.py
index 47307589d..1b7afb56c 100644
--- a/kuryr_kubernetes/clients.py
+++ b/kuryr_kubernetes/clients.py
@@ -103,7 +103,7 @@ def _create_ports(self, payload):
     response = self.post(os_port.Port.base_path, json=payload)
 
     if not response.ok:
-        raise os_exc.SDKException('Error when bulk creating ports: %s',
+        raise os_exc.SDKException('Error when bulk creating ports: %s' %
                                   response.text)
     return (os_port.Port(**item) for item in response.json()['ports'])
 
diff --git a/kuryr_kubernetes/tests/unit/test_clients.py b/kuryr_kubernetes/tests/unit/test_clients.py
index 5d1965f7d..7fb8efa37 100644
--- a/kuryr_kubernetes/tests/unit/test_clients.py
+++ b/kuryr_kubernetes/tests/unit/test_clients.py
@@ -15,6 +15,7 @@
 
 from unittest import mock
 
+from openstack import exceptions as os_exc
 from openstack.network.v2 import port as os_port
 
 from kuryr_kubernetes import clients
@@ -128,3 +129,27 @@ class TestOpenStackSDKHack(test_base.TestCase):
 
         clients._create_ports(m_osdk, payload)
         m_post.assert_called_once_with(os_port.Port.base_path, json=expected)
+
+    def test_create_ports_out_of_ports(self):
+        """Simulate error response from OpenStack SDK"""
+        m_response = mock.Mock()
+        m_response.text = ('{"NeutronError": {"type": "OverQuota", "message": '
+                           '"Quota exceeded for resources: [\'port\'].", '
+                           '"detail": ""}}')
+        m_response.ok = False
+        m_post = mock.Mock()
+        m_post.return_value = m_response
+        m_osdk = mock.Mock()
+        m_osdk.post = m_post
+
+        payload = {'ports': []}
+
+        try:
+            clients._create_ports(m_osdk, payload)
+        except os_exc.SDKException as ex:
+            # no additional params passed to the exception class
+            self.assertIsNone(ex.extra_data)
+            # no formatting placeholders in message
+            self.assertNotIn('%s', ex.message)
+
+        m_post.assert_called_once_with(os_port.Port.base_path, json=payload)