1 files changed, 7 insertions, 5 deletions
diff --git a/tox.ini b/tox.ini
index edea05d..65779fe 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.8
+minversion = 3.1.1
 envlist = py38,pypy,pep8,releasenotes
 skipsdist = True
 ignore_basepython_conflict = True
@@ -7,16 +7,16 @@ ignore_basepython_conflict = True
 [testenv]
 basepython = python3
 usedevelop = True
-install_command = pip install {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
-deps = -r{toxinidir}/requirements.txt
+deps =
+       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+       -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
 commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
-deps = hacking>=0.12,<0.13
+deps = hacking>=3.0.1,<3.1.0
 commands = flake8
 
 [testenv:venv]
@@ -42,4 +42,6 @@ commands = sphinx-build -a -E -d releasenotes/build/doctrees -b html releasenote
 
 [flake8]
 show-source = True
+# W503 line break before binary operator
+ignore = W503
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build