diff --git a/tox.ini b/tox.ini
index ef9add803dc..b064e51db30 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,9 +16,9 @@ setenv = VIRTUAL_ENV={envdir}
          OS_TEST_TIMEOUT=60
          OS_TEST_PATH=./cinder/tests/unit
 usedevelop = True
+install_command=python -m pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
 
-deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-        -r{toxinidir}/test-requirements.txt
+deps = -r{toxinidir}/test-requirements.txt
         -r{toxinidir}/requirements.txt
 
 # By default stestr will set concurrency
@@ -123,7 +123,6 @@ commands = {posargs}
 
 [testenv:docs]
 deps =
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands =
   rm -fr doc/source/contributor/api/
@@ -224,6 +223,7 @@ ignore-path=.tox,*.egg-info,doc/src/api,doc/source/drivers.rst,doc/build,.eggs/*
 extension=.txt,.rst,.inc
 
 [testenv:lower-constraints]
+install_command=python -m pip install {opts} {packages}
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt