diff --git a/rally/benchmark/context/base.py b/rally/benchmark/context/base.py
index 54520ddad0..8d4134cd5d 100644
--- a/rally/benchmark/context/base.py
+++ b/rally/benchmark/context/base.py
@@ -67,6 +67,9 @@ class Context(object):
 
     def __init__(self, context):
         self.config = context.get("config", {}).get(self.get_name(), {})
+        if hasattr(self, "DEFAULT_CONFIG"):
+            for key, value in self.DEFAULT_CONFIG.items():
+                self.config.setdefault(key, value)
         self.context = context
         self.task = context["task"]
 
diff --git a/rally/benchmark/context/network.py b/rally/benchmark/context/network.py
index b525389f6f..550ebef119 100644
--- a/rally/benchmark/context/network.py
+++ b/rally/benchmark/context/network.py
@@ -43,12 +43,14 @@ class Network(base.Context):
         },
         "additionalProperties": False
     }
-    START_CIDR_DFLT = "10.2.0.0/24"
+
+    DEFAULT_CONFIG = {
+        "start_cidr": "10.2.0.0/24",
+        "networks_per_tenant": 1
+    }
 
     def __init__(self, context):
         super(Network, self).__init__(context)
-        self.config.setdefault("start_cidr", self.START_CIDR_DFLT)
-        self.config.setdefault("networks_per_tenant", 1)
         self.net_wrapper = network_wrapper.wrap(
             osclients.Clients(context["admin"]["endpoint"]),
             self.config)
diff --git a/rally/benchmark/context/servers.py b/rally/benchmark/context/servers.py
index af4dff9789..2471fafc0b 100755
--- a/rally/benchmark/context/servers.py
+++ b/rally/benchmark/context/servers.py
@@ -62,9 +62,9 @@ class ServerGenerator(base.Context):
         "additionalProperties": False
     }
 
-    def __init__(self, context):
-        super(ServerGenerator, self).__init__(context)
-        self.config.setdefault("servers_per_tenant", 5)
+    DEFAULT_CONFIG = {
+        "servers_per_tenant": 5
+    }
 
     @rutils.log_task_wrapper(LOG.info, _("Enter context: `Servers`"))
     def setup(self):
diff --git a/rally/benchmark/context/stacks.py b/rally/benchmark/context/stacks.py
index 1342e4b961..25b9a1c3c7 100644
--- a/rally/benchmark/context/stacks.py
+++ b/rally/benchmark/context/stacks.py
@@ -54,10 +54,10 @@ class StackGenerator(base.Context):
         "additionalProperties": False
     }
 
-    def __init__(self, context):
-        super(StackGenerator, self).__init__(context)
-        self.config.setdefault("stacks_per_tenant", 2)
-        self.config.setdefault("resources_per_stack", 10)
+    DEFAULT_CONFIG = {
+        "stacks_per_tenant": 2,
+        "resources_per_stack": 10
+    }
 
     @staticmethod
     def _prepare_stack_template(res_num):
@@ -87,4 +87,4 @@ class StackGenerator(base.Context):
     @rutils.log_task_wrapper(LOG.info, _("Exit context: `Stacks`"))
     def cleanup(self):
         resource_manager.cleanup(names=["heat.stacks"],
-                                 users=self.context.get("users", []))
\ No newline at end of file
+                                 users=self.context.get("users", []))
diff --git a/rally/benchmark/context/users.py b/rally/benchmark/context/users.py
index 166dc26bc1..a0823fba14 100644
--- a/rally/benchmark/context/users.py
+++ b/rally/benchmark/context/users.py
@@ -84,17 +84,17 @@ class UserGenerator(base.Context):
     PATTERN_TENANT = "ctx_rally_%(task_id)s_tenant_%(iter)i"
     PATTERN_USER = "ctx_rally_%(tenant_id)s_user_%(uid)d"
 
+    DEFAULT_CONFIG = {
+        "tenants": 1,
+        "users_per_tenant": 1,
+        "resource_management_workers":
+            cfg.CONF.users_context.resource_management_workers,
+        "project_domain": cfg.CONF.users_context.project_domain,
+        "user_domain": cfg.CONF.users_context.user_domain
+    }
+
     def __init__(self, context):
         super(UserGenerator, self).__init__(context)
-        self.config.setdefault("tenants", 1)
-        self.config.setdefault("users_per_tenant", 1)
-        self.config.setdefault(
-            "resource_management_workers",
-            cfg.CONF.users_context.resource_management_workers)
-        self.config.setdefault("project_domain",
-                               cfg.CONF.users_context.project_domain)
-        self.config.setdefault("user_domain",
-                               cfg.CONF.users_context.user_domain)
         self.context["users"] = []
         self.context["tenants"] = dict()
         self.endpoint = self.context["admin"]["endpoint"]
diff --git a/rally/benchmark/context/volumes.py b/rally/benchmark/context/volumes.py
index 67840e295c..14af7a16d3 100644
--- a/rally/benchmark/context/volumes.py
+++ b/rally/benchmark/context/volumes.py
@@ -47,9 +47,9 @@ class VolumeGenerator(base.Context):
         "additionalProperties": False
     }
 
-    def __init__(self, context):
-        super(VolumeGenerator, self).__init__(context)
-        self.config.setdefault("volumes_per_tenant", 1)
+    DEFAULT_CONFIG = {
+        "volumes_per_tenant": 1
+    }
 
     @rutils.log_task_wrapper(LOG.info, _("Enter context: `Volumes`"))
     def setup(self):
diff --git a/tests/unit/benchmark/context/test_network.py b/tests/unit/benchmark/context/test_network.py
index d4bb802118..579fb6c093 100644
--- a/tests/unit/benchmark/context/test_network.py
+++ b/tests/unit/benchmark/context/test_network.py
@@ -31,7 +31,7 @@ class NetworkTestCase(test.TestCase):
                             "bar_tenant": {"networks": [{"id": "bar_net"}]}}}
 
     def test_START_CIDR_DFLT(self):
-        netaddr.IPNetwork(network_context.Network.START_CIDR_DFLT)
+        netaddr.IPNetwork(network_context.Network.DEFAULT_CONFIG["start_cidr"])
 
     @mock.patch("rally.osclients.Clients")
     @mock.patch(NET + "wrap", return_value="foo_service")
@@ -40,7 +40,7 @@ class NetworkTestCase(test.TestCase):
         self.assertEqual(context.net_wrapper, "foo_service")
         self.assertEqual(context.config["networks_per_tenant"], 1)
         self.assertEqual(context.config["start_cidr"],
-                         network_context.Network.START_CIDR_DFLT)
+                         network_context.Network.DEFAULT_CONFIG["start_cidr"])
 
         context = network_context.Network(
             self.get_context(start_cidr="foo_cidr", networks_per_tenant=42))