diff --git a/HACKING.rst b/HACKING.rst
index e57b670..e920634 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -8,7 +8,8 @@
 Tempest Specific Commandments
 ------------------------------
 
-- [T102] Cannot import OpenStack python clients in tempest/api tests
+- [T102] Cannot import OpenStack python clients in tempest/api &
+         tempest/scenario tests
 - [T104] Scenario tests require a services decorator
 - [T105] Unit tests cannot use setUpClass
 - [T106] vim configuration should not be kept in source files.
diff --git a/tempest/README.rst b/tempest/README.rst
index fb25151..d28c3f9 100644
--- a/tempest/README.rst
+++ b/tempest/README.rst
@@ -55,7 +55,8 @@
 functionality. They are typically a series of steps where complicated
 state requiring multiple services is set up exercised, and torn down.
 
-Scenario tests can and should use the OpenStack python clients.
+Scenario tests should not use the existing python clients for OpenStack,
+but should instead use the tempest implementations of clients.
 
 
 :ref:`stress_field_guide`
diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index 6014cff..29898a9 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -30,18 +30,18 @@
 mutable_default_args = re.compile(r"^\s*def .+\((.+=\{\}|.+=\[\])")
 
 
-def import_no_clients_in_api(physical_line, filename):
-    """Check for client imports from tempest/api tests
+def import_no_clients_in_api_and_scenario_tests(physical_line, filename):
+    """Check for client imports from tempest/api & tempest/scenario tests
 
     T102: Cannot import OpenStack python clients
     """
 
-    if "tempest/api" in filename:
+    if "tempest/api" in filename or "tempest/scenario" in filename:
         res = PYTHON_CLIENT_RE.match(physical_line)
         if res:
             return (physical_line.find(res.group(1)),
                     ("T102: python clients import not allowed"
-                     " in tempest/api/* tests"))
+                     " in tempest/api/* or tempest/scenario/* tests"))
 
 
 def scenario_tests_need_service_tags(physical_line, filename,
@@ -117,7 +117,7 @@
 
 
 def factory(register):
-    register(import_no_clients_in_api)
+    register(import_no_clients_in_api_and_scenario_tests)
     register(scenario_tests_need_service_tags)
     register(no_setup_teardown_class_for_tests)
     register(no_vi_headers)
diff --git a/tempest/scenario/README.rst b/tempest/scenario/README.rst
index 5a287d6..38e0de9 100644
--- a/tempest/scenario/README.rst
+++ b/tempest/scenario/README.rst
@@ -29,9 +29,9 @@
 
 Scope of these tests
 --------------------
-Scenario tests should use the official python client libraries for
-OpenStack, as they provide a more realistic approach in how people
-will interact with the services.
+Scenario tests should always use the Tempest implementation of the
+OpenStack API, as we want to ensure that bugs aren't hidden by the
+official clients.
 
 Tests should be tagged with which services they exercise, as
 determined by which client libraries are used directly by the test.
diff --git a/tempest/tests/test_hacking.py b/tempest/tests/test_hacking.py
index 6857461..fd01887 100644
--- a/tempest/tests/test_hacking.py
+++ b/tempest/tests/test_hacking.py
@@ -69,13 +69,18 @@
         self.assertFalse(checks.no_setup_teardown_class_for_tests(
             "  def tearDownClass(cls):", './tempest/test.py'))
 
-    def test_import_no_clients_in_api(self):
+    def test_import_no_clients_in_api_and_scenario_tests(self):
         for client in checks.PYTHON_CLIENTS:
             string = "import " + client + "client"
-            self.assertTrue(checks.import_no_clients_in_api(
-                string, './tempest/api/fake_test.py'))
-            self.assertFalse(checks.import_no_clients_in_api(
-                string, './tempest/scenario/fake_test.py'))
+            self.assertTrue(
+                checks.import_no_clients_in_api_and_scenario_tests(
+                    string, './tempest/api/fake_test.py'))
+            self.assertTrue(
+                checks.import_no_clients_in_api_and_scenario_tests(
+                    string, './tempest/scenario/fake_test.py'))
+            self.assertFalse(
+                checks.import_no_clients_in_api_and_scenario_tests(
+                    string, './tempest/test.py'))
 
     def test_scenario_tests_need_service_tags(self):
         self.assertFalse(checks.scenario_tests_need_service_tags(