diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions.py b/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions.py
index f0e576b..6720c22 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions.py
@@ -37,7 +37,7 @@
     # The disable_ssl appears in identity
     disable_ssl_certificate_validation = (
         CONF.identity.disable_ssl_certificate_validation)
-    ca_certs = None
+    ca_certs = CONF.identity.ca_certificates_file
 
     # Trace in debug section
     trace_requests = CONF.debug.trace_requests
@@ -149,6 +149,19 @@
     def delete_address_scope(self, id):
         return self.admin_client.delete_address_scope(id)
 
+    def create_router(self, ext_gw_info):
+        try:
+            router = self.admin_client.create_router(
+                                            'my-router',
+                                            external_gateway_info=ext_gw_info,
+                                            distributed=False)
+        # Retry if not running with DVR enabled
+        except lib_exc.BadRequest:
+            router = self.admin_client.create_router(
+                                            'my-router',
+                                            external_gateway_info=ext_gw_info)
+        return router['router']
+
 
 class BgpSpeakerTestJSON(BgpSpeakerTestJSONBase):
 
@@ -253,16 +266,12 @@
         tenant_net = self.create_network()
         tenant_subnet = self.create_subnet(tenant_net)
         ext_gw_info = {'network_id': self.ext_net_id}
-        router = self.admin_client.create_router(
-                                            'my-router',
-                                            external_gateway_info=ext_gw_info,
-                                            admin_state_up=True,
-                                            distributed=False)
-        self.admin_routers.append(router['router'])
+        router = self.create_router(ext_gw_info)
+        self.admin_routers.append(router)
         self.admin_client.add_router_interface_with_subnet_id(
-                                                       router['router']['id'],
+                                                       router['id'],
                                                        tenant_subnet['id'])
-        self.admin_routerports.append({'router_id': router['router']['id'],
+        self.admin_routerports.append({'router_id': router['id'],
                                        'subnet_id': tenant_subnet['id']})
         tenant_port = self.create_port(tenant_net)
         floatingip = self.create_floatingip(self.ext_net_id)
@@ -302,10 +311,7 @@
                                        ip_version=4,
                                        subnetpool_id=tenant_subnetpool['id'])
         ext_gw_info = {'network_id': ext_net['id']}
-        router = self.admin_client.create_router(
-                                            'my-router',
-                                            external_gateway_info=ext_gw_info,
-                                            distributed=False)['router']
+        router = self.create_router(ext_gw_info)
         self.admin_routers.append(router)
         self.admin_client.add_router_interface_with_subnet_id(
                                                        router['id'],
diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions_negative.py b/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions_negative.py
index 78569ea..fea7a46 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions_negative.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/api/test_bgp_speaker_extensions_negative.py
@@ -98,10 +98,7 @@
                                        ip_version=4,
                                        subnetpool_id=tenant_subnetpool2['id'])
         ext_gw_info = {'network_id': ext_net['id']}
-        router = self.admin_client.create_router(
-                                  'my-router',
-                                  distributed=False,
-                                  external_gateway_info=ext_gw_info)['router']
+        router = self.create_router(ext_gw_info)
         self.admin_routers.append(router)
         self.admin_client.add_router_interface_with_subnet_id(
                                                        router['id'],
diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
index de8677f..f752436 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
@@ -54,7 +54,7 @@
     # The disable_ssl appears in identity
     disable_ssl_certificate_validation = (
         CONF.identity.disable_ssl_certificate_validation)
-    ca_certs = None
+    ca_certs = CONF.identity.ca_certificates_file
 
     # Trace in debug section
     trace_requests = CONF.debug.trace_requests