diff --git a/.gitignore b/.gitignore
index 056ce97..0e448db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 *.pyc
 *.egg*
 gertty-env
+.tox
diff --git a/tox.ini b/tox.ini
index 30c179d..9e55945 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,6 +15,7 @@ downloadcache = ~/cache/pip
 
 [testenv:pep8]
 commands = flake8
+deps = flake8
 
 [testenv:cover]
 commands =
@@ -27,6 +28,7 @@ commands = python setup.py build_sphinx
 commands = {posargs}
 
 [flake8]
-ignore = E125,H
+ignore = E122,E123,E126,E127,E128,E129,E221,E225,E226,E231,E251,E261,E262,E265,E301,E302,E303,E711,E712,E721,F401,F403,F821,F841,W391
 show-source = True
 exclude = .venv,.tox,dist,doc,build,*.egg
+max-line-length = 172