diff --git a/tox.ini b/tox.ini
index 4fab1099d7..d5a875efed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,9 +7,10 @@ ignore_basepython_conflict=true
 [testenv]
 basepython = python3
 usedevelop = True
-install_command = pip install -U {opts} -c {toxinidir}/upper-constraints.txt {packages}
+install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
-deps = -r{toxinidir}/requirements.txt
+deps = -c{toxinidir}/upper-constraints.txt
+       -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
   stestr run {posargs}