diff --git a/hooks/horizon_contexts.py b/hooks/horizon_contexts.py
index 8b0eb4c6..b6f86b32 100644
--- a/hooks/horizon_contexts.py
+++ b/hooks/horizon_contexts.py
@@ -141,9 +141,12 @@ class IdentityServiceContext(OSContextGenerator):
                 # If using keystone v3 the context is incomplete without the
                 # admin domain id
                 if local_ctxt['api_version'] == '3':
+                    local_ctxt['ks_endpoint_path'] = 'v3'
                     if not config('default_domain'):
                         local_ctxt['admin_domain_id'] = rdata.get(
                             'admin_domain_id')
+                else:
+                    local_ctxt['ks_endpoint_path'] = 'v2.0'
                 if not context_complete(local_ctxt):
                     continue
 
@@ -176,12 +179,15 @@ class IdentityServiceContext(OSContextGenerator):
                 # region in order to support multi-region deployments
                 if region is not None:
                     if config("use-internal-endpoints") and internal_host:
-                        endpoint = ("%(internal_protocol)s://%(internal_host)s"
-                                    ":%(internal_port)s/v2.0") % local_ctxt
+                        endpoint = (
+                            "{internal_protocol}://{internal_host}"
+                            ":{internal_port}/{ks_endpoint_path}").format(
+                                **local_ctxt)
                     else:
-                        endpoint = ("%(service_protocol)s://%(service_host)s"
-                                    ":%(service_port)s/v2.0") % local_ctxt
-
+                        endpoint = (
+                            "{service_protocol}://{service_host}"
+                            ":{service_port}/{ks_endpoint_path}").format(
+                                **local_ctxt)
                     for reg in region.split():
                         regions.add((endpoint, reg))
 
diff --git a/unit_tests/test_horizon_contexts.py b/unit_tests/test_horizon_contexts.py
index bb5f54ad..8089093f 100644
--- a/unit_tests/test_horizon_contexts.py
+++ b/unit_tests/test_horizon_contexts.py
@@ -698,6 +698,7 @@ class TestHorizonContexts(CharmTestCase):
                           'internal_protocol': 'http',
                           'ks_host': 'foo', 'ks_port': 5000,
                           'ks_protocol': 'http',
+                          'ks_endpoint_path': 'v2.0',
                           'default_role': 'member',
                           'api_version': '2', 'service_protocol': 'http'})
 
@@ -716,6 +717,7 @@ class TestHorizonContexts(CharmTestCase):
                           'internal_host': 'bar', 'internal_port': 5001,
                           'internal_protocol': 'http',
                           'ks_host': 'foo', 'ks_port': 5000,
+                          'ks_endpoint_path': 'v2.0',
                           'ks_protocol': 'http',
                           'default_role': 'member',
                           'api_version': '2', 'service_protocol': 'http'})
@@ -737,12 +739,41 @@ class TestHorizonContexts(CharmTestCase):
                           'internal_protocol': 'http',
                           'ks_host': 'foo', 'ks_port': 5000,
                           'ks_protocol': 'http',
+                          'ks_endpoint_path': 'v2.0',
                           'default_role': 'member',
                           'regions': [{'endpoint': 'http://foo:5000/v2.0',
                                        'title': 'regionOne'},
                                       {'endpoint': 'http://foo:5000/v2.0',
                                        'title': 'regionTwo'}]})
 
+    @patch("hooks.horizon_contexts.format_ipv6_addr")
+    def test_IdentityServiceContext_multi_region_v3(self,
+                                                    mock_format_ipv6_addr):
+        mock_format_ipv6_addr.side_effect = lambda x: x
+        self.relation_ids.return_value = ['foo']
+        self.related_units.return_value = ['bar', 'baz']
+        self.relation_get.side_effect = self.test_relation.get
+        self.test_relation.set({'service_host': 'foo', 'service_port': 5000,
+                                'internal_host': 'bar', 'internal_port': 5001,
+                                'region': 'regionOne regionTwo',
+                                'api_version': '3',
+                                'admin_domain_id': 'admindomainid'})
+        self.context_complete.return_value = True
+        self.assertEqual(horizon_contexts.IdentityServiceContext()(),
+                         {'admin_domain_id': 'admindomainid',
+                          'service_host': 'foo', 'service_port': 5000,
+                          'service_protocol': 'http', 'api_version': '3',
+                          'internal_host': 'bar', 'internal_port': 5001,
+                          'internal_protocol': 'http',
+                          'ks_host': 'foo', 'ks_port': 5000,
+                          'ks_protocol': 'http',
+                          'ks_endpoint_path': 'v3',
+                          'default_role': 'member',
+                          'regions': [{'endpoint': 'http://foo:5000/v3',
+                                       'title': 'regionOne'},
+                                      {'endpoint': 'http://foo:5000/v3',
+                                       'title': 'regionTwo'}]})
+
     @patch("hooks.horizon_contexts.format_ipv6_addr")
     def test_IdentityServiceContext_api3(self, mock_format_ipv6_addr):
         mock_format_ipv6_addr.side_effect = lambda x: x
@@ -767,6 +798,7 @@ class TestHorizonContexts(CharmTestCase):
             'ks_host': 'foo',
             'ks_port': 5000,
             'ks_protocol': 'http',
+            'ks_endpoint_path': 'v3',
             'api_version': '3',
             'default_role': 'member',
             'admin_domain_id': 'admindomainid',
@@ -829,6 +861,7 @@ class TestHorizonContexts(CharmTestCase):
             'ks_host': 'foo',
             'ks_port': 5000,
             'ks_protocol': 'http',
+            'ks_endpoint_path': 'v3',
             'api_version': '3',
             'default_role': 'Member',
             'admin_domain_id': 'admindomainid',
@@ -855,6 +888,7 @@ class TestHorizonContexts(CharmTestCase):
             'internal_protocol': 'http',
             'ks_host': 'foo', 'ks_port': 5000,
             'ks_protocol': 'http',
+            'ks_endpoint_path': 'v3',
             'api_version': '3',
             'default_role': 'member',
             'admin_domain_id': 'admindomainid',
@@ -869,7 +903,7 @@ class TestHorizonContexts(CharmTestCase):
         self.relation_get.side_effect = self.test_relation.get
         self.test_relation.set({'service_host': 'foo', 'service_port': 5000,
                                 'internal_host': 'bar', 'internal_port': 5001,
-                                'region': 'regionOne'})
+                                'region': 'regionOne', 'api_version': '2'})
         self.test_config.set('use-internal-endpoints', True)
         self.context_complete.return_value = True
         self.maxDiff = None
@@ -879,6 +913,7 @@ class TestHorizonContexts(CharmTestCase):
                           'internal_host': 'bar', 'internal_port': 5001,
                           'internal_protocol': 'http',
                           'ks_host': 'bar', 'ks_port': 5001,
+                          'ks_endpoint_path': 'v2.0',
                           'ks_protocol': 'http',
                           'api_version': '2',
                           'default_role': 'member'})
@@ -891,7 +926,8 @@ class TestHorizonContexts(CharmTestCase):
         self.related_units.return_value = ['bar', 'baz']
         self.relation_get.side_effect = self.test_relation.get
         self.test_relation.set({'service_host': 'foo', 'service_port': 5000,
-                                'region': 'regionOne regionTwo'})
+                                'region': 'regionOne regionTwo',
+                                'api_version': '2'})
         self.test_config.set('use-internal-endpoints', True)
         self.context_complete.return_value = True
         self.maxDiff = None
@@ -901,6 +937,7 @@ class TestHorizonContexts(CharmTestCase):
                           'internal_host': None, 'internal_port': None,
                           'internal_protocol': 'http',
                           'ks_host': 'foo', 'ks_port': 5000,
+                          'ks_endpoint_path': 'v2.0',
                           'ks_protocol': 'http',
                           'api_version': '2',
                           'default_role': 'member',