diff --git a/config_tempest/services/horizon.py b/config_tempest/services/horizon.py
index 93f66ff8..e54f7fb1 100644
--- a/config_tempest/services/horizon.py
+++ b/config_tempest/services/horizon.py
@@ -13,8 +13,13 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+
+from ssl import CertificateError
+
 from six.moves import urllib
 
+from config_tempest import constants as C
+
 
 def configure_horizon(conf):
     """Derive the horizon URIs from the identity's URI."""
@@ -28,6 +33,11 @@ def configure_horizon(conf):
         urllib.request.urlopen(base)
     except urllib.error.URLError:
         has_horizon = False
+    except CertificateError as ex:
+        C.LOG.info('Certificate Error while discovering Horizon: %s', (ex))
+        has_horizon = False
+
     conf.set('service_available', 'horizon', str(has_horizon))
-    conf.set('dashboard', 'dashboard_url', base + '/')
-    conf.set('dashboard', 'login_url', base + '/auth/login/')
+    if has_horizon:
+        conf.set('dashboard', 'dashboard_url', base + '/')
+        conf.set('dashboard', 'login_url', base + '/auth/login/')
diff --git a/config_tempest/tests/services/test_horizon.py b/config_tempest/tests/services/test_horizon.py
index 33e847ac..e5ba40bd 100644
--- a/config_tempest/tests/services/test_horizon.py
+++ b/config_tempest/tests/services/test_horizon.py
@@ -13,6 +13,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from ssl import CertificateError
+
 from fixtures import MonkeyPatch
 import mock
 
@@ -48,3 +50,13 @@ class TestConfigTempest(BaseConfigTempestTest):
                          "http://[::1]/dashboard/")
         self.assertEqual(self.conf.get('dashboard', 'login_url'),
                          "http://[::1]/dashboard/auth/login/")
+
+    def test_configure_horizon_certificate_error(self):
+        mock_function = mock.Mock(return_value=True)
+        mock_function.side_effect = CertificateError
+        self.useFixture(MonkeyPatch('six.moves.urllib.request.urlopen',
+                                    mock_function))
+        horizon.configure_horizon(self.conf)
+        self.assertEqual(self.conf.get('service_available', 'horizon'),
+                         "False")
+        self.assertFalse(self.conf.has_section('dashboard'))