diff --git a/test-requirements.txt b/test-requirements.txt
index 86da6c85..825ccfb5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 # 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
+hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 oslotest
diff --git a/tox.ini b/tox.ini
index e4152688..4540f72c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,9 +14,9 @@ deps =
   -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
-  stestr run '{posargs}'
+  stestr run {posargs}
 
-[testenv:flake8]
+[testenv:linters]
 commands =
   flake8 {posargs}