diff --git a/requirements.txt b/requirements.txt
index e5ffa4b1f..4f19904e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,8 @@
-six>=1.5.2
-PyYAML
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+six>=1.9.0 # MIT
+PyYAML>=3.10.0 # MIT
+pbr>=1.8 # Apache-2.0
+stevedore>=1.17.1 # Apache-2.0
 python-jenkins>=0.4.8
-pbr>=1.0.0,<2.0
-stevedore>=1.8.0
diff --git a/setup.py b/setup.py
index a5af70f06..782bb21f0 100644
--- a/setup.py
+++ b/setup.py
@@ -1,19 +1,29 @@
-# Copyright 2012 Hewlett-Packard Development Company, L.P.
+# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#      http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
+# In python < 2.7.4, a lazy loading of package `pbr` will break
+# setuptools if some other modules registered functions in `atexit`.
+# solution from: http://bugs.python.org/issue15881#msg170215
+try:
+    import multiprocessing  # noqa
+except ImportError:
+    pass
+
 setuptools.setup(
-    setup_requires=['pbr'],
+    setup_requires=['pbr>=1.8'],
     pbr=True)
diff --git a/test-requirements.txt b/test-requirements.txt
index bbaa4bfa3..af7716030 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,10 +1,14 @@
-hacking>=0.5.6,<=10.1
-coverage>=3.6
-fixtures
-python-subunit
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+hacking<0.13,>=0.12.0 # Apache-2.0
+
+coverage>=4.0 # Apache-2.0
+fixtures>=3.0.0 # Apache-2.0/BSD
+python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.3.1,<1.5.0
-testscenarios
-testtools
-testrepository
+testscenarios>=0.4 # Apache-2.0/BSD
+testtools>=1.4.0 # MIT
+testrepository>=0.0.18 # Apache-2.0/BSD
+mock>=2.0 # BSD
 sphinxcontrib-programoutput
-mock
diff --git a/tox.ini b/tox.ini
index d8bcba376..f29c9950f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,6 +50,6 @@ commands = {posargs}
 [flake8]
 # These are ignored intentionally in openstack-infra projects; please
 # don't submit patches that solely correct them or enable them.
-ignore = E125,H
+ignore = E125,E128,H
 show-source = True
 exclude = .virtualenv,.venv,.tox,dist,doc,build,*.egg,.test