diff --git a/test-requirements.txt b/test-requirements.txt
index aba62628..dd4f36d0 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=0.9.2,<0.10
+hacking<0.11,>=0.10.0
 oslotest>=1.2.0  # Apache-2.0
 mock>=1.0
 testtools>=0.9.36,!=1.2.0
diff --git a/tox.ini b/tox.ini
index 4ef1c335..44571ff8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,8 +49,6 @@ deps = {[testenv:py27]deps}
 commands = {posargs}
 
 [flake8]
-# H904 Wrap long lines in parentheses instead of a backslash
-ignore = H904
 builtins = _
 exclude = .venv,.tox,dist,doc,./taskflow/openstack/common,*egg,.git,build,tools