diff --git a/flake8/checker.py b/flake8/checker.py
index 0a3a86f..fc2da6b 100644
--- a/flake8/checker.py
+++ b/flake8/checker.py
@@ -2,8 +2,6 @@
 import logging
 import os
 
-LOG = logging.getLogger(__name__)
-
 try:
     import multiprocessing
 except ImportError:
@@ -11,6 +9,8 @@ except ImportError:
 
 from flake8 import utils
 
+LOG = logging.getLogger(__name__)
+
 
 class Manager(object):
     """Manage the parallelism and checker instances for each plugin and file.
diff --git a/tox.ini b/tox.ini
index 353cb3b..00d6469 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ deps =
     .
 commands = {posargs}
 
+# Linters
 [testenv:flake8]
 skipsdist = true
 skip_install = true
@@ -30,7 +31,7 @@ skipsdist = true
 skip_install = true
 use_develop = false
 deps =
-    .
+    pyflakes
     pylint
 commands =
     pylint flake8
@@ -45,6 +46,19 @@ deps =
 commands =
     mypy flake8
 
+[testenv:linters]
+basepython = python3
+skipsdist = true
+skip_install = true
+use_develop = false
+deps =
+    {[testenv:flake8]deps}
+    {[testenv:pylint]deps}
+commands =
+    {[testenv:flake8]commands}
+    {[testenv:pylint]commands}
+
+# Documentation
 [testenv:docs]
 deps =
     sphinx>=1.3.0
@@ -67,6 +81,7 @@ deps =
 commands =
     python setup.py check -r -s
 
+# Flake8 Configuration
 [flake8]
 # Ignore some flake8-docstrings errors
 ignore = D203