diff --git a/lower-constraints.txt b/lower-constraints.txt
index 0dbb17383..7d5a8d7aa 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -1,31 +1,15 @@
 alembic==0.9.8
 amqp==2.2.2
 appdirs==1.4.3
-asn1crypto==0.24.0
 attrs==17.4.0
-automaton==1.14.0
 Babel==2.3.4
-enum34==1.0.4
 bandit==1.1.0
-bcrypt==3.1.4
 cachetools==2.0.1
-castellan==0.16.0
-certifi==2018.1.18
-cffi==1.11.5
-chardet==3.0.4
-cliff==2.11.0
-cmd2==0.8.1
 colorama==0.3.9
 contextlib2==0.5.5
 coverage==4.0
-cryptography==2.1
-cursive==0.2.1
-ddt==1.0.1
 debtcollector==1.19.0
 decorator==3.4.0
-deprecation==2.0
-dogpile.cache==0.6.5
-enum-compat==0.0.2
 eventlet==0.18.2
 extras==1.0.0
 fasteners==0.14.1
@@ -33,26 +17,20 @@ fixtures==3.0.0
 flake8==2.5.5
 future==0.16.0
 futurist==1.6.0
-futures==3.0.0
 gabbi==1.35.0
 gitdb2==2.0.3
 GitPython==2.1.8
 greenlet==0.4.10
 hacking==0.12.0
-idna==2.6
 iso8601==0.1.11
 Jinja2==2.10
-jmespath==0.9.3
-jsonpatch==1.21
-jsonpath-rw-ext==1.1.3
 jsonpath-rw==1.4.0
-jsonpointer==2.0
+jsonpath-rw-ext==1.1.3
 jsonschema==2.6.0
 keystoneauth1==3.9.0
-keystonemiddleware==4.17.0
+keystonemiddleware==4.18.0
 kombu==4.1.0
 linecache2==1.0.0
-lxml==3.4.1
 Mako==1.0.7
 MarkupSafe==1.0
 mccabe==0.2.1
@@ -60,22 +38,12 @@ microversion-parse==0.2.1
 mock==2.0.0
 monotonic==1.4
 mox3==0.20.0
-msgpack==0.5.6
-munch==2.2.0
+msgpack-python==0.5.6
 netaddr==0.7.18
 netifaces==0.10.4
-networkx==1.11
-numpy==1.14.2
-openstacksdk==0.12.0
-os-brick==2.5.0
 os-client-config==1.29.0
 os-service-types==1.2.0
 os-traits==0.4.0
-os-vif==1.7.0
-os-win==3.0.0
-os-xenapi==0.3.3
-osc-lib==1.10.0
-oslo.cache==1.26.0
 oslo.concurrency==3.26.0
 oslo.config==6.1.0
 oslo.context==2.19.2
@@ -85,65 +53,39 @@ oslo.log==3.36.0
 oslo.messaging==6.3.0
 oslo.middleware==3.31.0
 oslo.policy==1.35.0
-oslo.privsep==1.23.0
-oslo.reports==1.18.0
-oslo.rootwrap==5.8.0
 oslo.serialization==2.18.0
 oslo.service==1.24.0
 oslo.upgradecheck==0.1.1
 oslo.utils==3.37.0
 oslo.versionedobjects==1.31.2
-oslo.vmware==2.17.0
-oslotest==3.2.0
-osprofiler==1.4.0
-packaging==17.1
-paramiko==2.0.0
+oslotest==3.4.0
 Paste==2.0.2
-PasteDeploy==1.5.0
+PasteDeploy==1.5.2
 pbr==2.0.0
 pep8==1.5.7
-pika-pool==0.1.3
-pika==0.10.0
 pluggy==0.6.0
 ply==3.11
 prettytable==0.7.1
-psutil==3.2.2
-psycopg2==2.6.2
+psycopg2==2.7
 py==1.5.2
-pyasn1-modules==0.2.1
-pyasn1==0.4.2
 pycadf==2.7.0
-pycparser==2.18
 pyflakes==0.8.1
 pyinotify==0.9.6
 PyMySQL==0.7.6
-PyNaCl==1.2.1
-pyOpenSSL==17.5.0
 pyparsing==2.2.0
-pyperclip==1.6.0
-pypowervm==1.1.15
-pyroute2==0.4.21
 pytest==3.4.2
-python-barbicanclient==4.5.2
-python-cinderclient==3.3.0
 python-dateutil==2.5.3
 python-editor==1.0.3
-python-glanceclient==2.8.0
-python-ironicclient==2.3.0
 python-keystoneclient==3.15.0
 python-mimeparse==1.6.0
-python-neutronclient==6.7.0
 python-subunit==1.2.0
 pytz==2018.3
 PyYAML==3.12
 repoze.lru==0.7
-requests-mock==1.2.0
 requests==2.14.2
 requestsexceptions==1.4.0
-retrying==1.3.3
 rfc3986==0.3.1
 Routes==2.3.1
-simplejson==3.13.2
 six==1.10.0
 smmap2==2.0.3
 SQLAlchemy==1.0.10
@@ -151,24 +93,16 @@ sqlparse==0.2.4
 statsd==3.2.2
 stestr==1.0.0
 stevedore==1.20.0
-setuptools==21.0.0
-suds-jurko==0.6
-taskflow==2.16.0
 Tempita==0.5.2
 tenacity==4.9.0
 testrepository==0.0.20
 testresources==2.0.0
 testscenarios==0.4
 testtools==2.2.0
-tooz==1.58.0
 traceback2==1.4.0
 unittest2==1.1.0
 urllib3==1.22
 vine==1.1.4
-voluptuous==0.11.1
-warlock==1.3.0
 WebOb==1.8.2
-websockify==0.8.0
 wrapt==1.10.11
 wsgi-intercept==1.7.0
-zVMCloudConnector==1.1.1
diff --git a/requirements.txt b/requirements.txt
index b46d39918..e006da98e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
-keystonemiddleware>=4.17.0 # Apache-2.0
+keystonemiddleware>=4.18.0 # Apache-2.0
 Routes>=2.3.1 # MIT
 WebOb>=1.8.2 # MIT
 jsonschema<3.0.0,>=2.6.0 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index 10fe251b7..1b4d1249b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,7 +8,7 @@ fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0.0 # BSD
 psycopg2>=2.6.2 # LGPL/ZPL
 PyMySQL>=0.7.6 # MIT License
-oslotest>=3.2.0 # Apache-2.0
+oslotest>=3.4.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 bandit>=1.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 4b7409a91..9108c529e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -194,7 +194,17 @@ commands =
 
 [testenv:lower-constraints]
 basepython = python3
+# When using pbr and in a git repo, 'setup.py install' does not install
+# packages. 'setup.py develop', used when usedevelop is True, does.
+usedevelop = False
+# Use our own install_command to turn off upper constraints, which conflicts
+# with lower constraints.
+install_command = pip install {opts} {packages}
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
+# Test with both functional and unit tests.
+commands =
+  {[testenv]commands}
+  stestr --test-path=./placement/tests run {posargs}