diff --git a/openstack/compute/v2/keypair.py b/openstack/compute/v2/keypair.py
index 1db894f81..607aed774 100644
--- a/openstack/compute/v2/keypair.py
+++ b/openstack/compute/v2/keypair.py
@@ -52,7 +52,11 @@ class Keypair(resource.Resource):
 
     @classmethod
     def list(cls, session, paginated=False, base_path=None):
-        resp = session.get(cls.base_path,
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        resp = session.get(base_path,
                            headers={"Accept": "application/json"})
         resp = resp.json()
         resp = resp[cls.resources_key]
diff --git a/openstack/compute/v2/server.py b/openstack/compute/v2/server.py
index a9db33f9a..32eeec53f 100644
--- a/openstack/compute/v2/server.py
+++ b/openstack/compute/v2/server.py
@@ -141,7 +141,8 @@ class Server(resource.Resource, metadata.MetadataMixin, resource.TagMixin):
     def _prepare_request(self, requires_id=True, prepend_key=True,
                          base_path=None):
         request = super(Server, self)._prepare_request(requires_id=requires_id,
-                                                       prepend_key=prepend_key)
+                                                       prepend_key=prepend_key,
+                                                       base_path=base_path)
 
         server_body = request.body[self.resource_key]
 
diff --git a/openstack/compute/v2/server_ip.py b/openstack/compute/v2/server_ip.py
index d3b9dd236..710437793 100644
--- a/openstack/compute/v2/server_ip.py
+++ b/openstack/compute/v2/server_ip.py
@@ -34,7 +34,11 @@ class ServerIP(resource.Resource):
     @classmethod
     def list(cls, session, paginated=False, server_id=None,
              network_label=None, base_path=None, **params):
-        url = cls.base_path % {"server_id": server_id}
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        url = base_path % {"server_id": server_id}
 
         if network_label is not None:
             url = utils.urljoin(url, network_label)
diff --git a/openstack/database/v1/user.py b/openstack/database/v1/user.py
index a18f0b898..b9bd4fe14 100644
--- a/openstack/database/v1/user.py
+++ b/openstack/database/v1/user.py
@@ -43,7 +43,10 @@ class User(resource.Resource):
         """
         body = {self.resources_key: self._body.dirty}
 
-        uri = self.base_path % self._uri.attributes
+        if base_path is None:
+            base_path = self.base_path
+
+        uri = base_path % self._uri.attributes
         uri = utils.urljoin(uri, self.id)
 
         return resource._Request(uri, body, None)
diff --git a/openstack/identity/v2/extension.py b/openstack/identity/v2/extension.py
index 5f95a499d..93f71ad95 100644
--- a/openstack/identity/v2/extension.py
+++ b/openstack/identity/v2/extension.py
@@ -44,7 +44,11 @@ class Extension(resource.Resource):
 
     @classmethod
     def list(cls, session, paginated=False, base_path=None, **params):
-        resp = session.get(cls.base_path,
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        resp = session.get(base_path,
                            params=params)
         resp = resp.json()
         for data in resp[cls.resources_key]['values']:
diff --git a/openstack/identity/version.py b/openstack/identity/version.py
index 710328055..ea1575f81 100644
--- a/openstack/identity/version.py
+++ b/openstack/identity/version.py
@@ -28,7 +28,11 @@ class Version(resource.Resource):
 
     @classmethod
     def list(cls, session, paginated=False, base_path=None, **params):
-        resp = session.get(cls.base_path,
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        resp = session.get(base_path,
                            params=params)
         resp = resp.json()
         for data in resp[cls.resources_key]['values']:
diff --git a/openstack/message/v2/message.py b/openstack/message/v2/message.py
index a8818ace8..8b8d59385 100644
--- a/openstack/message/v2/message.py
+++ b/openstack/message/v2/message.py
@@ -75,7 +75,11 @@ class Message(resource.Resource):
         and `X-PROJECT-ID` fields which are required by Zaqar v2 API.
         """
         more_data = True
-        uri = cls.base_path % params
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        uri = base_path % params
         headers = {
             "Client-ID": params.get('client_id', None) or str(uuid.uuid4()),
             "X-PROJECT-ID": params.get('project_id', None
diff --git a/openstack/message/v2/queue.py b/openstack/message/v2/queue.py
index 7b65bb881..7d580e486 100644
--- a/openstack/message/v2/queue.py
+++ b/openstack/message/v2/queue.py
@@ -75,7 +75,11 @@ class Queue(resource.Resource):
         """
         more_data = True
         query_params = cls._query_mapping._transpose(params)
-        uri = cls.base_path % params
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        uri = base_path % params
         headers = {
             "Client-ID": params.get('client_id', None) or str(uuid.uuid4()),
             "X-PROJECT-ID": params.get('project_id', None
diff --git a/openstack/message/v2/subscription.py b/openstack/message/v2/subscription.py
index b3960c0fd..3c6322869 100644
--- a/openstack/message/v2/subscription.py
+++ b/openstack/message/v2/subscription.py
@@ -60,7 +60,8 @@ class Subscription(resource.Resource):
 
     def create(self, session, prepend_key=True, base_path=None):
         request = self._prepare_request(requires_id=False,
-                                        prepend_key=prepend_key)
+                                        prepend_key=prepend_key,
+                                        base_path=base_path)
         headers = {
             "Client-ID": self.client_id or str(uuid.uuid4()),
             "X-PROJECT-ID": self.project_id or session.get_project_id()
@@ -81,7 +82,11 @@ class Subscription(resource.Resource):
         and `X-PROJECT-ID` fields which are required by Zaqar v2 API.
         """
         more_data = True
-        uri = cls.base_path % params
+
+        if base_path is None:
+            base_path = cls.base_path
+
+        uri = base_path % params
         headers = {
             "Client-ID": params.get('client_id', None) or str(uuid.uuid4()),
             "X-PROJECT-ID": params.get('project_id', None