diff --git a/test-requirements.txt b/test-requirements.txt
index 161ebe0..4626f68 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -7,7 +7,7 @@
 # be installed in a specific order.
 #
 # Hacking should appear first in case something else depends on pep8
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
diff --git a/tools/install_venv.py b/tools/install_venv.py
index ae4ecfe..f423d89 100644
--- a/tools/install_venv.py
+++ b/tools/install_venv.py
@@ -67,5 +67,6 @@ def main(argv):
     install.install_dependencies()
     print_help(venv, root)
 
+
 if __name__ == '__main__':
     main(sys.argv)
diff --git a/tox.ini b/tox.ini
index 97de0fb..88526ac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -37,7 +37,8 @@ commands = flake8 {posargs}
 [flake8]
 # F405 TEMPLATES may be undefined, or defined from star imports
 # (because it is not easy to avoid this in openstack_dashboard.test.settings)
-ignore = F405
+# W504 line break after binary operator
+ignore = F405,W504
 exclude = .venv,.git,.tox,dist,*egg,build,node_modules
 max-complexity = 20